clever

Eavesdropping with your cell phone

business, security / By /

From David S. Bennahum’s “Hope You Like Jamming, Too” (Slate):

…innovative industrial spies, who have several neat new tricks. These days, a boardroom Mata Hari can purchase a specially designed cell phone that will answer incoming calls while appearing to be switched off. In a business meeting, she could casually leave her phone on the table while excusing herself to go to the bathroom. Once she’s gone, she can call the phone she left behind and eavesdrop on what the other side is saying in her absence.

How an email account without passwords can be good for security

business, security / By /

From Robert X. Cringely’s “Stream On“:

Mailinator is ad hoc e-mail for those times when just maybe you don’t want to use your regular e-mail address. Say you are snitching on the boss, buying inflatable people, or want 32 different PayPal accounts. Just tell someone—anyone—that your e-mail address is fatman@mailinator.com or skinnykid@mailinator.com, or clueless@mailinator.com or any other address you like at mailinator.com. But this is no dead-end. When people write to you at that address the message will go through. That’s because Mailinator accepts any message going to that domain and automatically assigns an e-mail account to it. But what about passwords? There are none. Anyone can go to Mailinator and check the mail for clueless or any other name. But with so many names and the idea that Mailinator is only for occasional use, who cares?

The email dead drop

security / By /

From the L.A. Times‘ “Cyberspace Gives Al Qaeda Refuge“:

Simplicity seems to work best. One common method of communicating over the Internet is essentially an e-mail version of the classic dead drop.

Members of a cell are all given the same prearranged username and password for an e-mail account on an Internet service provider, or ISP, such as Hotmail or Yahoo, according to the recent joint report by the Treasury and Justice departments.

One member writes a message, but instead of sending it, he puts it in the ‘draft’ file and then logs off. Someone else can then sign onto the account using the same username and password, read the draft and then delete it.

‘Because the draft was never sent, the ISP does not retain a copy of it and there is no record of it traversing the Internet—it never went anywhere, its recipients came to it,’ the report said.

Laundering a car’s VIN

business, security / By /

From Bruce Schneier’s Crypto-Gram of 15 October 2003:

Precision stripping: criminal steals car, chop shop strips car completely down to chassis, chassis dumped on street, cops tow chassis away, chassis sold at auction, criminal buys chassis, chop shop reattaches parts. Result: legitimate car that can be legally sold used. The VIN has been ‘laundered’.

Jeff Bezos on the differences between gifts and choices

commonplace book / By /

From Jeff Bezos’s “We are What We Choose: Remarks by Jeff Bezos, as delivered to the Class of 2010 Baccalaureate” (Princeton University: 30 May 2010):

What I want to talk to you about today is the difference between gifts and choices. Cleverness is a gift, kindness is a choice. Gifts are easy — they’re given after all. Choices can be hard. You can seduce yourself with your gifts if you’re not careful, and if you do, it’ll probably be to the detriment of your choices.

…

Tomorrow, in a very real sense, your life — the life you author from scratch on your own — begins.

How will you use your gifts? What choices will you make?

Will inertia be your guide, or will you follow your passions?

Will you follow dogma, or will you be original?

Will you choose a life of ease, or a life of service and adventure?

Will you wilt under criticism, or will you follow your convictions?

Will you bluff it out when you’re wrong, or will you apologize?

Will you guard your heart against rejection, or will you act when you fall in love?

Will you play it safe, or will you be a little bit swashbuckling?

When it’s tough, will you give up, or will you be relentless?

Will you be a cynic, or will you be a builder?

Will you be clever at the expense of others, or will you be kind?

I will hazard a prediction. When you are 80 years old, and in a quiet moment of reflection narrating for only yourself the most personal version of your life story, the telling that will be most compact and meaningful will be the series of choices you have made. In the end, we are our choices. Build yourself a great story.

The origin of the word “munge”, “hack”, & others

history, language & literature, technology / By /

From Steven Levy’s Hackers: Heroes of the Computer Revolution (Penguin Books: 2001): 23:

The core members hung out at [MIT’s Tech Model Railroad Club in the late 1950s] for hours; constantly improving The System, arguing about what could be done next, developing a jargon of their own that seemed incomprehensible to outsiders who might chance on these teen-aged fanatics … When a piece of equipment wasn’t working, it was “losing”; when a piece of equipment was ruined, it was “munged” (Mash Until No Good); the two desks in the corner of the room were not called the office, but the “orifice”; one who insisted on studying for courses was a “tool”; garbage was called “cruft”; and a project undertaken or a product built not solely to fulfill some constructive goal, but with some wild pleasure taken in mere involvement, was called a “hack.”

This latter term may have been suggested by ancient MIT lingo– the word “hack” had long been used to describe the elaborate college pranks that MIT students would regularly devise, such as covering the dome that overlooked the campus with reflecting foil. But as the TMRC people used the word, there was serious respect implied. While someone might call a clever connection between relays a “mere hack,” it would be understood that, to qualify as a hack, the feat must be imbued with innovation, style, and technical virtuosity.

Malware forges online bank statements to hide fraud

business, science, security / By /

From Kim Zetter’s “New Malware Re-Writes Online Bank Statements to Cover Fraud” (Wired: 30 September 2009):

New malware being used by cybercrooks does more than let hackers loot a bank account; it hides evidence of a victim’s dwindling balance by rewriting online bank statements on the fly, according to a new report.

The sophisticated hack uses a Trojan horse program installed on the victim’s machine that alters html coding before it’s displayed in the user’s browser, to either erase evidence of a money transfer transaction entirely from a bank statement, or alter the amount of money transfers and balances.

The ruse buys the crooks time before a victim discovers the fraud, though won’t work if a victim uses an uninfected machine to check his or her bank balance.

The novel technique was employed in August by a gang who targeted customers of leading German banks and stole Euro 300,000 in three weeks, according to Yuval Ben-Itzhak, chief technology officer of computer security firm Finjan.

…

The victims’ computers are infected with the Trojan, known as URLZone, after visiting compromised legitimate web sites or rogue sites set up by the hackers.

Once a victim is infected, the malware grabs the consumer’s log in credentials to their bank account, then contacts a control center hosted on a machine in Ukraine for further instructions. The control center tells the Trojan how much money to wire transfer, and where to send it. To avoid tripping a bank’s automated anti-fraud detectors, the malware will withdraw random amounts, and check to make sure the withdrawal doesn’t exceed the victim’s balance.

The money gets transferred to the legitimate accounts of unsuspecting money mules who’ve been recruited online for work-at-home gigs, never suspecting that the money they’re allowing to flow through their account is being laundered. The mule transfers the money to the crook’s chosen account. The cyber gang Finjan tracked used each mule only twice, to avoid fraud pattern detection.

…

The researchers also found statistics in the command tool showing that out of 90,000 visitors to the gang’s rogue and compromised websites, 6,400 were infected with the URLZone trojan. Most of the attacks Finjan observed affected people using Internet Explorer browsers …

Finjan provided law enforcement officials with details about the gang’s activities and says the hosting company for the Ukraine server has since suspended the domain for the command and control center. But Finjan estimates that a gang using the scheme unimpeded could rake in about $7.3 million annually.

Various confidence scams, tricks, & frauds

business, history, law, science, security / By /

From “List of confidence tricks” (Wikipedia: 3 July 2009):

Get-rich-quick schemes

Get-rich-quick schemes are extremely varied. For example, fake franchises, real estate “sure things”, get-rich-quick books, wealth-building seminars, self-help gurus, sure-fire inventions, useless products, chain letters, fortune tellers, quack doctors, miracle pharmaceuticals, Nigerian money scams, charms and talismans are all used to separate the mark from his money. Variations include the pyramid scheme, Ponzi scheme and Matrix sale.

Count Victor Lustig sold the “money-printing machine” which could copy $100 bills. The client, sensing huge profits, would buy the machines for a high price (usually over $30,000). Over the next twelve hours, the machine would produce just two more $100 bills, but after that it produced only blank paper, as its supply of hidden $100 bills would have become exhausted. This type of scheme is also called the “money box” scheme.

…

The wire game, as depicted in the movie The Sting, trades on the promise of insider knowledge to beat a gamble, stock trade or other monetary action. In the wire game, a “mob” composed of dozens of grifters simulates a “wire store”, i.e., a place where results from horse races are received by telegram and posted on a large board, while also being read aloud by an announcer. The griftee is given secret foreknowledge of the race results minutes before the race is broadcast, and is therefore able to place a sure bet at the wire store. In reality, of course, the con artists who set up the wire store are the providers of the inside information, and the mark eventually is led to place a large bet, thinking it to be a sure win. At this point, some mistake is made, which actually makes the bet a loss. …

Salting or to salt the mine are terms for a scam in which gems or gold ore are planted in a mine or on the landscape, duping the greedy mark into purchasing shares in a worthless or non-existent mining company.[2] During the Gold Rush, scammers would load shotguns with gold dust and shoot into the sides of the mine to give the appearance of a rich ore, thus “salting the mine”. …

The Spanish Prisoner scam – and its modern variant, the advance fee fraud or Nigerian scam – take advantage of the victim’s greed. The basic premise involves enlisting the mark to aid in retrieving some stolen money from its hiding place. The victim sometimes believes he can cheat the con artists out of their money, but anyone trying this has already fallen for the essential con by believing that the money is there to steal (see also Black money scam). …

Many conmen employ extra tricks to keep the victim from going to the police. A common ploy of investment scammers is to encourage a mark to use money concealed from tax authorities. The mark cannot go to the authorities without revealing that he or she has committed tax fraud. Many swindles involve a minor element of crime or some other misdeed. The mark is made to think that he or she will gain money by helping fraudsters get huge sums out of a country (the classic Nigerian scam); hence marks cannot go to the police without revealing that they planned to commit a crime themselves.

…

Gold brick scams

Gold brick scams involve selling a tangible item for more than it is worth; named after selling the victim an allegedly golden ingot which turns out to be gold-coated lead.

…

Pig-in-a-poke originated in the late Middle Ages. The con entails a sale of a (suckling) “pig” in a “poke” (bag). The bag ostensibly contains a live healthy little pig, but actually contains a cat (not particularly prized as a source of meat, and at any rate, quite unlikely to grow to be a large hog). If one buys a “pig in a poke” without looking in the bag (a colloquial expression in the English language, meaning “to be a sucker”), the person has bought something of less value than was assumed, and has learned firsthand the lesson caveat emptor.

…

The Thai gem scam involves layers of con men and helpers who tell a tourist in Bangkok of an opportunity to earn money by buying duty-free jewelry and having it shipped back to the tourist’s home country. The mark is driven around the city in a tuk-tuk operated by one of the con men, who ensures that the mark meets one helper after another, until the mark is persuaded to buy the jewelry from a store also operated by the swindlers. The gems are real but significantly overpriced. This scam has been operating for 20 years in Bangkok, and is said to be protected by Thai police and politicians. A similar scam usually runs in parallel for custom-made suits.

…

Extortion or false-injury tricks

The badger game extortion is often perpetrated on married men. The mark is deliberately coerced into a compromising position, a supposed affair for example, then threatened with public exposure of his acts unless blackmail money is paid.

…

The Melon Drop is a scam in which the scammer will intentionally bump into the mark and drop a package containing (already broken) glass. He will blame the damage on the clumsiness of the mark, and demand money in compensation. This con arose when artists discovered that the Japanese paid large sums of money for watermelons. The scammer would go to a supermarket to buy a cheap watermelon, then bump into a Japanese tourist and set a high price.

…

Gambling tricks

Three-card Monte, ‘Find The Queen’, the “Three-card Trick”, or “Follow The Lady”, is (except for the props) essentially the same as the probably centuries-older shell game or thimblerig. The trickster shows three playing cards to the audience, one of which is a queen (the “lady”), then places the cards face-down, shuffles them around and invites the audience to bet on which one is the queen. At first the audience is skeptical, so the shill places a bet and the scammer allows him to win. In one variation of the game, the shill will (apparently surreptitiously) peek at the lady, ensuring that the mark also sees the card. This is sometimes enough to entice the audience to place bets, but the trickster uses sleight of hand to ensure that they always lose, unless the conman decides to let them win, hoping to lure them into betting much more. The mark loses whenever the dealer chooses to make him lose. This con appears in the Eric Garcia novel Matchstick Men and is featured in the movie Edmond.

A variation on this scam exists in Barcelona, Spain, but with the addition of a pickpocket. The dealer and shill behave in an overtly obvious manner, attracting a larger audience. When the pickpocket succeeds in stealing from a member of the audience, he signals the dealer. The dealer then shouts the word “aqua”, and the three split up. The audience is left believing that “aqua” is a code word indicating the police are coming, and that the performance was a failed scam.

In the Football Picks Scam the scammer sends out tip sheet stating a game will go one way to 100 potential victims and the other way to another 100. The next week, the 100 or so who received the correct answer are divided into two groups and fed another pick. This is repeated until a small population have (apparently) received a series of supernaturally perfect picks, then the final pick is offered for sale. Despite being well-known (it was even described completely on an episode of The Simpsons and used by Derren Brown in “The System”), this scam is run almost continuously in different forms by different operators. The sports picks can also be replaced with securities, or any other random process, in an alternative form. This scam has also been called the inverted pyramid scheme, because of the steadily decreasing population of victims at each stage.

…

Visitors to Las Vegas or other gambling towns often encounter the Barred Winner scam, a form of advance fee fraud performed in person. The artist will approach his mark outside a casino with a stack or bag of high-value casino chips and say that he just won big, but the casino accused him of cheating and threw him out without letting him redeem the chips. The artist asks the mark to go in and cash the chips for him. The artist will often offer a percentage of the winnings to the mark for his trouble. But, when the mark agrees, the artist feigns suspicion and asks the mark to put up something of value “for insurance”. The mark agrees, hands over jewelry, a credit card or their wallet, then goes in to cash the chips. When the mark arrives at the cashier, they are informed the chips are fake. The artist, by this time, is long gone with the mark’s valuables.

False reward tricks

The glim-dropper requires several accomplices, one of whom must be a one-eyed man. One grifter goes into a store and pretends he has lost his glass eye. Everyone looks around, but the eye cannot be found. He declares that he will pay a thousand-dollar reward for the return of his eye, leaving contact information. The next day, an accomplice enters the store and pretends to find the eye. The storekeeper (the intended griftee), thinking of the reward, offers to take it and return it to its owner. The finder insists he will return it himself, and demands the owner’s address. Thinking he will lose all chance of the reward, the storekeeper offers a hundred dollars for the eye. The finder bargains him up to $250, and departs.…

The fiddle game uses the pigeon drop technique. A pair of con men work together, one going into an expensive restaurant in shabby clothes, eating, and claiming to have left his wallet at home, which is nearby. As collateral, the con man leaves his only worldly possession, the violin that provides his livelihood. After he leaves, the second con man swoops in, offers an outrageously large amount (for example $50,000) for such a rare instrument, then looks at his watch and runs off to an appointment, leaving his card for the mark to call him when the fiddle-owner returns. The mark’s greed comes into play when the “poor man” comes back, having gotten the money to pay for his meal and redeem his violin. The mark, thinking he has an offer on the table, then buys the violin from the fiddle player (who “reluctantly” sells it eventually for, say, $5,000). The result is the two conmen are $5,000 richer (less the cost of the violin), and the mark is left with a cheap instrument.

…

Other confidence tricks and techniques

…

The Landlord Scam advertises an apartment for rent at an attractive price. The con artist, usually someone who is house-sitting or has a short-term sublet at the unit, takes a deposit and first/last month’s rent from every person who views the suite. When move-in day arrives, the con artist is of course gone, and the apartment belongs to none of the angry people carrying boxes.

…

Change raising is a common short con and involves an offer to change an amount of money with someone, while at the same time taking change or bills back and forth to confuse the person as to how much money is actually being changed. The most common form, “the Short Count”, has been featured prominently in several movies about grifting, notably Nueve Reinas, The Grifters and Paper Moon. A con artist shopping at, say a gas station, is given 80 cents in change because he lacks two dimes to complete the sale (say the sale cost is $19.20 and the con man has a 20 dollar bill). He goes out to his car and returns a short time later, with 20 cents. He returns them, saying that he found the rest of the change to make a dollar, and asking for a bill so he will not have to carry coins. The confused store clerk agrees, exchanging a dollar for the 20 cents the conman returned. In essence, the mark makes change twice.

…

Beijing tea scam is a famous scam in and around Beijing. The artists (usually female and working in pairs) will approach tourists and try to make friends. After chatting, they will suggest a trip to see a tea ceremony, claiming that they have never been to one before. The tourist is never shown a menu, but assumes that this is how things are done in China. After the ceremony, the bill is presented to the tourist, charging upwards of $100 per head. The artists will then hand over their bills, and the tourists are obliged to follow suit.

Crazy anti-terrorism plans that worked

history, law, politics, security / By /

From a Special Operations officer quoted in Tom Ricks’s Inbox (The Washington Post: 5 October 2008):

One of the most interesting operations was the laundry mat [sic]. Having lost many troops and civilians to bombings, the Brits decided they needed to determine who was making the bombs and where they were being manufactured. One bright fellow recommended they operate a laundry and when asked “what the hell he was talking about,” he explained the plan and it was incorporated — to much success.

The plan was simple: Build a laundry and staff it with locals and a few of their own. The laundry would then send out “color coded” special discount tickets, to the effect of “get two loads for the price of one,” etc. The color coding was matched to specific streets and thus when someone brought in their laundry, it was easy to determine the general location from which a city map was coded.

While the laundry was indeed being washed, pressed and dry cleaned, it had one additional cycle — every garment, sheet, glove, pair of pants, was first sent through an analyzer, located in the basement, that checked for bomb-making residue. The analyzer was disguised as just another piece of the laundry equipment; good OPSEC [operational security]. Within a few weeks, multiple positives had shown up, indicating the ingredients of bomb residue, and intelligence had determined which areas of the city were involved. To narrow their target list, [the laundry] simply sent out more specific coupons [numbered] to all houses in the area, and before long they had good addresses. After confirming addresses, authorities with the SAS teams swooped down on the multiple homes and arrested multiple personnel and confiscated numerous assembled bombs, weapons and ingredients. During the entire operation, no one was injured or killed.
ad_icon

By the way, the gentleman also told the story of how [the British] also bugged every new car going into Northern Ireland, and thus knew everything [Sinn Fein leader] Gerry Adams was discussing. They did this because Adams always conducted mobile meetings and always used new cars.

The Israelis have a term for this type of thinking, “Embracing the Meshugganah,” which literally translated means, embrace the craziness, because the crazier the plan, the less likely the adversary will have thought about it, and thus, not have implemented a counter-measure.

How the Storm botnet defeats anti-virus programs

business, security, tech in changing society / By /

From Lisa Vaas’ “Storm Worm Botnet Lobotomizing Anti-Virus Programs” (eWeek: 24 October 2007):

According to an Oct. 22 posting by Sophos analyst Richard Cohen, the Storm botnet – Sophos calls it Dorf, and its also known as Ecard malware – is dropping files that call a routine that gets Windows to tell it every time a new process is started. The malware checks the process file name against an internal list and kills the ones that match – sometimes. But Storm has taken a new twist: It now would rather leave processes running and just patch entry points of loading processes that might pose a threat to it. Then, when processes such as anti-virus programs run, they simply return a value of 0.

…

The strategy means that users wont be alarmed by their anti-virus software not running. Even more ominously, the technique is designed to fool NAC (network access control) systems, which bar insecure clients from registering on a network by checking to see whether a client is running anti-virus software and whether its patched.

…

Its the latest evidence of why Storm is “the scariest and most substantial threat” security researchers have ever seen, he said. Storm is patient, its resilient, its adaptive in that it can defeat anti-virus products in multiple ways (programmatically, it changes its signature every 30 minutes), its invisible because it comes with a rootkit built in and hides at the kernel level, and its clever enough to change every few weeks.

…

Hence the hush-hush nature of research around Storm. Corman said he can tell us that its now accurately pegged at 6 million, but he cant tell us who came up with the figure, or how. Besides retribution, Storms ability to morph means that those who know how to watch it are jealously guarding their techniques. “None of the researchers wanted me to say anything about it,” Corman said. “They’re afraid of retaliation. They fear that if we disclose their unique means of finding information on Storm,” the botnet herder will change tactics yet again and the window into Storm will slam shut.

How con artists use psychology to work

1 Comment / business, science, security / By /

From Paul J. Zak’s “How to Run a Con” (Psychology Today: 13 November 2008):

When I was in high school, I took a job at an ARCO gas station on the outskirts of Santa Barbara, California. At the time, I drove a 1967 Mustang hotrod and thought I might pick up some tips and cheap parts by working around cars after school. You see a lot of interesting things working the night shift in a sketchy neighborhood. I constantly saw people making bad decisions: drunk drivers, gang members, unhappy cops, and con men. In fact, I was the victim of a classic con called “The Pigeon Drop.” If we humans have such big brains, how can we get conned?

Here’s what happened to me. One slow Sunday afternoon, a man comes out of the restroom with a pearl necklace in his hand. “Found it on the bathroom floor” he says. He followed with “Geez, looks nice-I wonder who lost it?” Just then, the gas station’s phone rings and a man asked if anyone found a pearl necklace that he had purchased as a gift for his wife. He offers a $200 reward for the necklace’s return. I tell him that a customer found it. “OK” he says, “I’ll be there in 30 minutes.” I give him the ARCO address and he gives me his phone number. The man who found the necklace hears all this but tells me he is running late for a job interview and cannot wait for the other man to arrive.

Huum, what to do? The man with the necklace said “Why don’t I give you the necklace and we split the reward?” The greed-o-meter goes off in my head, suppressing all rational thought. “Yeah, you give me the necklace to hold and I’ll give you $100” I suggest. He agrees. Since high school kids working at gas stations don’t have $100, I take money out of the cash drawer to complete the transaction.

You can guess the rest. The man with the lost necklace doesn’t come and never answers my many calls. After about an hour, I call the police. The “pearl” necklace was a two dollar fake and the number I was calling went to a pay phone nearby. I had to fess up to my boss and pay back the money with my next paycheck.

Why did this con work? Let’s do some neuroscience. While the primary motivator from my perspective was greed, the pigeon drop cleverly engages THOMAS (The Human Oxytocin Mediated Attachment System). … THOMAS is a powerful brain circuit that releases the neurochemical oxytocin when we are trusted and induces a desire to reciprocate the trust we have been shown–even with strangers.

The key to a con is not that you trust the conman, but that he shows he trusts you. Conmen ply their trade by appearing fragile or needing help, by seeming vulnerable. Because of THOMAS, the human brain makes us feel good when we help others–this is the basis for attachment to family and friends and cooperation with strangers. “I need your help” is a potent stimulus for action.

A botnet with a contingency plan

business, law, security, tech in changing society / By /

From Gregg Keizer’s “Massive botnet returns from the dead, starts spamming” (Computerworld: 26 November 2008):

A big spam-spewing botnet shut down two weeks ago has been resurrected, security researchers said today, and is again under the control of criminals.

The “Srizbi” botnet returned from the dead late Tuesday, said Fengmin Gong, chief security content officer at FireEye Inc., when the infected PCs were able to successfully reconnect with new command-and-control servers, which are now based in Estonia.

Srizbi was knocked out more than two weeks ago when McColo Corp., a hosting company that had been accused of harboring a wide range of criminal activities, was yanked off the Internet by its upstream service providers. With McColo down, PCs infected with Srizbi and other bot Trojan horses were unable to communicate with their command servers, which had been hosted by McColo. As a result, spam levels dropped precipitously.

But as other researchers noted last week, Srizbi had a fallback strategy. In the end, that strategy paid off for the criminals who control the botnet.

According to Gong, when Srizbi bots were unable to connect with the command-and-control servers hosted by McColo, they tried to connect with new servers via domains that were generated on the fly by an internal algorithm. FireEye reverse-engineered Srizbi, rooted out that algorithm and used it to predict, then preemptively register, several hundred of the possible routing domains.

The domain names, said Gong, were generated on a three-day cycle, and for a while, FireEye was able to keep up — and effectively block Srizbi’s handlers from regaining control.

“We have registered a couple hundred domains,” Gong said, “but we made the decision that we cannot afford to spend so much money to keep registering so many [domain] names.”

Once FireEye stopped preempting Srizbi’s makers, the latter swooped in and registered the five domains in the next cycle. Those domains, in turn, pointed Srizbi bots to the new command-and-control servers, which then immediately updated the infected machines to a new version of the malware.

Social engineering a bank robbery

security / By /

From Ernesto Londono and Clarence Williams’s “Md., D.C. Banks Duped By Phony Cash Courier” (The Washington Post: 12 January 2008):

And on Thursday, about 9:30 a.m., a man dressed as an employee of the security company Brink’s walked into a Wachovia branch in downtown Washington and walked out with more than $350,000.

The man had a badge and a gun holster on his belt, said Debbie Weierman, a spokeswoman for the FBI’s Washington field office. He told officials at the bank, at 801 Pennsylvania Ave. NW, that he was filling in for the regular courier.

About 4 p.m., when the real guard showed up, a bank official told him that someone had picked up the cash, D.C. police said. The guard returned to his office and told a supervisor that he did not make the pickup at the bank. The supervisor called a Wachovia manager, who in turn notified authorities. Police were called nearly 11 hours after the heist.

Cloned trucks used to commit crimes

business, security / By /

From Brian Ross’ “Fake FedEx Trucks; When the Drugs Absolutely Have to Get There” (ABC News: 18 January 2008):

Savvy criminals are using some of the country’s most credible logos, including FedEx, Wal-Mart, DirecTV and the U.S. Border Patrol, to create fake trucks to smuggle drugs, money and illegal aliens across the border, according to a report by the Florida Department of Law Enforcement.

Termed “cloned” vehicles, the report also warns that terrorists could use the same fake trucks to gain access to secure areas with hidden weapons.

The report says criminals have been able to easily obtain the necessary vinyl logo markings and signs for $6,000 or less. Authorities say “cosmetically cloned commercial vehicles are not illegal.”

…

In another case, a truck painted with DirecTV and other markings was pulled over in a routine traffic stop in Mississippi and discovered to be carrying 786 pounds of cocaine.

Police said they became suspicious because the truck carried the markings or DirecTV and several of its rivals. An 800 number on the truck’s rear to report bad driving referred callers to an adult sex chat line.

How the Greek cell phone network was compromised

business, politics, security, tech in changing society / By /

From Vassilis Prevelakis and Diomidis Spinellis’ “The Athens Affair” (IEEE Spectrum: July 2007):

On 9 March 2005, a 38-year-old Greek electrical engineer named Costas Tsalikidis was found hanged in his Athens loft apartment, an apparent suicide. It would prove to be merely the first public news of a scandal that would roil Greece for months.

The next day, the prime minister of Greece was told that his cellphone was being bugged, as were those of the mayor of Athens and at least 100 other high-ranking dignitaries, including an employee of the U.S. embassy.

The victims were customers of Athens-based Vodafone-Panafon, generally known as Vodafone Greece, the country’s largest cellular service provider; Tsalikidis was in charge of network planning at the company.

…

We now know that the illegally implanted software, which was eventually found in a total of four of Vodafone’s Greek switches, created parallel streams of digitized voice for the tapped phone calls. One stream was the ordinary one, between the two calling parties. The other stream, an exact copy, was directed to other cellphones, allowing the tappers to listen in on the conversations on the cellphones, and probably also to record them. The software also routed location and other information about those phone calls to these shadow handsets via automated text messages.

…

The day after Tsalikidis’s body was discovered, CEO Koronias met with the director of the Greek prime minister’s political office. Yiannis Angelou, and the minister of public order, Giorgos Voulgarakis. Koronias told them that rogue software used the lawful wiretapping mechanisms of Vodafone’s digital switches to tap about 100 phones and handed over a list of bugged numbers. Besides the prime minister and his wife, phones belonging to the ministers of national defense, foreign affairs, and justice, the mayor of Athens, and the Greek European Union commissioner were all compromised. Others belonged to members of civil rights organizations, peace activists, and antiglobalization groups; senior staff at the ministries of National Defense, Public Order, Merchant Marine, and Foreign Affairs; the New Democracy ruling party; the Hellenic Navy general staff; and a Greek-American employee at the United States Embassy in Athens.

…

First, consider how a phone call, yours or a prime minister’s, gets completed. Long before you dial a number on your handset, your cellphone has been communicating with nearby cellular base stations. One of those stations, usually the nearest, has agreed to be the intermediary between your phone and the network as a whole. Your telephone handset converts your words into a stream of digital data that is sent to a transceiver at the base station.

The base station’s activities are governed by a base station controller, a special-purpose computer within the station that allocates radio channels and helps coordinate handovers between the transceivers under its control.

This controller in turn communicates with a mobile switching center that takes phone calls and connects them to call recipients within the same switching center, other switching centers within the company, or special exchanges that act as gateways to foreign networks, routing calls to other telephone networks (mobile or landline). The mobile switching centers are particularly important to the Athens affair because they hosted the rogue phone-tapping software, and it is there that the eavesdropping originated. They were the logical choice, because they are at the heart of the network; the intruders needed to take over only a few of them in order to carry out their attack.

Both the base station controllers and the switching centers are built around a large computer, known as a switch, capable of creating a dedicated communications path between a phone within its network and, in principle, any other phone in the world. Switches are holdovers from the 1970s, an era when powerful computers filled rooms and were built around proprietary hardware and software. Though these computers are smaller nowadays, the system’s basic architecture remains largely unchanged.

Like most phone companies, Vodafone Greece uses the same kind of computer for both its mobile switching centers and its base station controllers—Ericsson’s AXE line of switches. A central processor coordinates the switch’s operations and directs the switch to set up a speech or data path from one phone to another and then routes a call through it. Logs of network activity and billing records are stored on disk by a separate unit, called a management processor.

The key to understanding the hack at the heart of the Athens affair is knowing how the Ericsson AXE allows lawful intercepts—what are popularly called “wiretaps.” Though the details differ from country to country, in Greece, as in most places, the process starts when a law enforcement official goes to a court and obtains a warrant, which is then presented to the phone company whose customer is to be tapped.

Nowadays, all wiretaps are carried out at the central office. In AXE exchanges a remote-control equipment subsystem, or RES, carries out the phone tap by monitoring the speech and data streams of switched calls. It is a software subsystem typically used for setting up wiretaps, which only law officers are supposed to have access to. When the wiretapped phone makes a call, the RES copies the conversation into a second data stream and diverts that copy to a phone line used by law enforcement officials.

Ericsson optionally provides an interception management system (IMS), through which lawful call intercepts are set up and managed. When a court order is presented to the phone company, its operators initiate an intercept by filling out a dialog box in the IMS software. The optional IMS in the operator interface and the RES in the exchange each contain a list of wiretaps: wiretap requests in the case of the IMS, actual taps in the RES. Only IMS-initiated wiretaps should be active in the RES, so a wiretap in the RES without a request for a tap in the IMS is a pretty good indicator that an unauthorized tap has occurred. An audit procedure can be used to find any discrepancies between them.

…

It took guile and some serious programming chops to manipulate the lawful call-intercept functions in Vodafone’s mobile switching centers. The intruders’ task was particularly complicated because they needed to install and operate the wiretapping software on the exchanges without being detected by Vodafone or Ericsson system administrators. From time to time the intruders needed access to the rogue software to update the lists of monitored numbers and shadow phones. These activities had to be kept off all logs, while the software itself had to be invisible to the system administrators conducting routine maintenance activities. The intruders achieved all these objectives.

…

The challenge faced by the intruders was to use the RES’s capabilities to duplicate and divert the bits of a call stream without using the dialog-box interface to the IMS, which would create auditable logs of their activities. The intruders pulled this off by installing a series of patches to 29 separate blocks of code, according to Ericsson officials who testified before the Greek parliamentary committee that investigated the wiretaps. This rogue software modified the central processor’s software to directly initiate a wiretap, using the RES’s capabilities. Best of all, for them, the taps were not visible to the operators, because the IMS and its user interface weren’t used.

The full version of the software would have recorded the phone numbers being tapped in an official registry within the exchange. And, as we noted, an audit could then find a discrepancy between the numbers monitored by the exchange and the warrants active in the IMS. But the rogue software bypassed the IMS. Instead, it cleverly stored the bugged numbers in two data areas that were part of the rogue software’s own memory space, which was within the switch’s memory but isolated and not made known to the rest of the switch.

That by itself put the rogue software a long way toward escaping detection. But the perpetrators hid their own tracks in a number of other ways as well. There were a variety of circumstances by which Vodafone technicians could have discovered the alterations to the AXE’s software blocks. For example, they could have taken a listing of all the blocks, which would show all the active processes running within the AXE—similar to the task manager output in Microsoft Windows or the process status (ps) output in Unix. They then would have seen that some processes were active, though they shouldn’t have been. But the rogue software apparently modified the commands that list the active blocks in a way that omitted certain blocks—the ones that related to intercepts—from any such listing.

In addition, the rogue software might have been discovered during a software upgrade or even when Vodafone technicians installed a minor patch. It is standard practice in the telecommunications industry for technicians to verify the existing block contents before performing an upgrade or patch. We don’t know why the rogue software was not detected in this way, but we suspect that the software also modified the operation of the command used to print the checksums—codes that create a kind of signature against which the integrity of the existing blocks can be validated. One way or another, the blocks appeared unaltered to the operators.

Finally, the software included a back door to allow the perpetrators to control it in the future. This, too, was cleverly constructed to avoid detection. A report by the Hellenic Authority for the Information and Communication Security and Privacy (the Greek abbreviation is ADAE) indicates that the rogue software modified the exchange’s command parser—a routine that accepts commands from a person with system administrator status—so that innocuous commands followed by six spaces would deactivate the exchange’s transaction log and the alarm associated with its deactivation, and allow the execution of commands associated with the lawful interception subsystem. In effect, it was a signal to allow operations associated with the wiretaps but leave no trace of them. It also added a new user name and password to the system, which could be used to obtain access to the exchange.

…Security experts have also discovered other rootkits for general-purpose operating systems, such as Linux, Windows, and Solaris, but to our knowledge this is the first time a rootkit has been observed on a special-purpose system, in this case an Ericsson telephone switch.

…

So the investigators painstakingly reconstructed an approximation of the original PLEX source files that the intruders developed. It turned out to be the equivalent of about 6500 lines of code, a surprisingly substantial piece of software.

Craigslist “everything is free!” scams

law, security, tech in changing society / By /

Robert Salisbury

From “Man scammed by Craigslist ad” (The Seattle Times: 24 March 2008):

The ads popped up Saturday afternoon, saying the owner of a Jacksonville home was forced to leave the area suddenly and his belongings, including a horse, were free for the taking, said Jackson County sheriff’s Detective Sgt. Colin Fagan.

But Robert Salisbury had no plans to leave. The independent contractor was at Emigrant Lake when he got a call from a woman who had stopped by his house to claim his horse.

On his way home he stopped a truck loaded down with his work ladders, lawn mower and weed eater.

“I informed them I was the owner, but they refused to give the stuff back,” Salisbury said. “They showed me the Craigslist printout and told me they had the right to do what they did.”

The driver sped away after rebuking Salisbury. On his way home he spotted other cars filled with his belongings.

Once home he was greeted by close to 30 people rummaging through his barn and front porch.

From “Couple held in Craigslist theft case” (The Seattle Times: 1 April 2008):

Police on Monday arrested a Medford couple who allegedly used hoax postings on Craigslist to cover up their own thefts from a rural Jacksonville residence later inundated by Craigslist readers who thought the house’s contents were free pickings for the taking.

Amber D. Herbert, 28, and Brandon D. Herbert, 29, were taken into custody on burglary, theft and computer crime charges involving the Craigslist hoax that drew international attention and cost the victim several thousand dollars, authorities said.

…the Herberts told police they took several saddles from the property and sold them over the Internet.

Laurie Raye

From “Tacoma woman’s house emptied after craigslist hoax” (The Seattle Times: 5 April 2007):

Laurie Raye said she had everything stripped from her home after someone placed a fake ad on the San Francisco-based Internet site, a collection of online classifieds.

…

Raye had recently evicted a tenant and cleaned out the rental.

The ad posted last weekend welcomed people to take for free anything they wanted from the home. It has since been pulled from the site, but not before the residence was stripped of light fixtures, the hot water heater and the kitchen sink.

Neighbors said they saw strangers hauling items away, apparently looking for salvage material.

Even the front door and a vinyl window were pilfered, Raye said.

“In the ad, it said come and take what you want. Everything is free,” she said. “Please help yourself to anything on the property.”

From “Woman charged after Craigslist posting resulted in a house stripped” (The Seattle Times: 17 May 2007):

Pierce County prosecutors have filed charges against the niece of a woman whose house was stripped clean after a Craigslist.org posting advertised that everything in the home was free.

Nichole Blackwell, 28, was charged with second-degree burglary, malicious mischief and criminal impersonation for allegedly posting an ad that read, “Moving out … House being demolished. Come and take whatever you want, nothing is off limits,” on the online classifieds Web site, according to charging documents from Pierce County Superior Court.

It wasn’t until six days after the ad was posted that Laurie Raye, owner of the home in the 1200 block of East 64th Street in Tacoma, checked on the house to find it stripped.

Nearly everything that wasn’t bolted down — and some stuff that was — was taken.

People, thinking that they could remove whatever they wanted, grabbed the refrigerator, front door and kitchen sink, among other things, according to the documents.

Police believe Blackwell disliked Raye and was particularly upset because Raye had recently evicted Blackwell’s mother from the house.

Synchronization attacks at fast food drive-through windows

security / By /

From Bruce Schneier’s “Getting Free Food at a Fast-Food Drive-In” (Crypto-Gram: 15 September 2007):

It’s easy. Find a fast-food restaurant with two drive-through windows: one where you order and pay, and the other where you receive your food. This won’t work at the more-common U.S. configuration: a microphone where you order, and a single window where you both pay and receive your food. The video demonstrates the attack at a McDonald’s in — I assume — France.

Wait until there is someone behind you and someone in front of you. Don’t order anything at the first window. Tell the clerk that you forgot your money and didn’t order anything. Then drive to the second window, and take the food that the person behind you ordered.

It’s a clever exploit. Basically, it’s a synchronization attack. By exploiting the limited information flow between the two windows, you can insert yourself into the pay-receive queue.

A wireless router with 2 networks: 1 secure, 1 open

business, technology / By /

From Bruce Schneier’s “My Open Wireless Network” (Crypto-Gram: 15 January 2008):

A company called Fon has an interesting approach to this problem. Fon wireless access points have two wireless networks: a secure one for you, and an open one for everyone else. You can configure your open network in either “Bill” or “Linus” mode: In the former, people pay you to use your network, and you have to pay to use any other Fon wireless network. In Linus mode, anyone can use your network, and you can use any other Fon wireless network for free. It’s a really clever idea.

To solve a problem, you first have to figure out the problem

commonplace book, science, true stories / By /

From Russell L. Ackoff & Daniel Greenberg’s Turning Learning Right Side Up: Putting Education Back on Track (2008):

A classic story illustrates very well the potential cost of placing a problem in a disciplinary box. It involves a multistoried office building in New York. Occupants began complaining about the poor elevator service provided in the building. Waiting times for elevators at peak hours, they said, were excessively long. Several of the tenants threatened to break their leases and move out of the building because of this…

Management authorized a study to determine what would be the best solution. The study revealed that because of the age of the building no engineering solution could be justified economically. The engineers said that management would just have to live with the problem permanently.

The desperate manager called a meeting of his staff, which included a young recently hired graduate in personnel psychology…The young man had not focused on elevator performance but on the fact that people complained about waiting only a few minutes. Why, he asked himself, were they complaining about waiting for only a very short time? He concluded that the complaints were a consequence of boredom. Therefore, he took the problem to be one of giving those waiting something to occupy their time pleasantly. He suggested installing mirrors in the elevator boarding areas so that those waiting could look at each other or themselves without appearing to do so. The manager took up his suggestion. The installation of mirrors was made quickly and at a relatively low cost. The complaints about waiting stopped.

Today, mirrors in elevator lobbies and even on elevators in tall buildings are commonplace.

A cheap, easy way to obfuscate license plates

security / By /

From Victor Bogado da Silva Lins’ letter in Bruce Schneier’s Crypto-Gram (15 May 2004):

You mentioned in your last crypto-gram newsletter about a cover that makes a license plate impossible to read from certain angles. Brazilian people have thought in another low-tech solution for the same “problem”, they simply tie some ribbons to the plate or the car itself; when the car is running (speeding) the ribbons fly and get in front of the plate making it difficult to read the plate.