New Tool Keeps Censors in the Dark

August 2, 2011
10 Comments

A new approach to overcoming state-level Internet censorship relies, ironically enough, on a technique that security experts have frequently associated with government surveillance.

Current anti-censorship technologies, including the services Tor and Dynaweb, direct connections to restricted websites through a network of encrypted proxy servers, with the aim of hiding who’s visiting such sites from censors. But the censors are constantly searching for and blocking these proxies. A new scheme, called Telex, makes it harder for censors to block communications by disguising traffic destined for restricted sites as traffic meant for popular, uncensored websites. It does this by employing the same method of analyzing packets of data that censors often use.

“To route around state-level Internet censorship, people have relied on proxy servers outside of the country doing the censorship,” says J. Alex Halderman, assistant professor of electrical engineering and computer science at the University of Michigan. “The difficulty there is, you have to communicate to those people where the proxies are, and it’s very hard to do that without also letting the government censors figure out where the proxies are.”

The Telex system has two major components: “stations” at dozens of Internet service providers (ISPs)—the stations connect traffic from inside nations that censor to the rest of the Internet—and the Telex client software program that runs on the computers of people who want to avoid censorship.

This is an excerpt from a piece I wrote that was published today in MIT Technology Review. Read the full story here.

Digital Hit Men for Hire

August 1, 2011
6 Comments

Cyber attacks designed to knock Web sites off line happen every day, yet shopping for a virtual hit man to launch one of these assaults has traditionally been a dicey affair. That’s starting to change: Hackers are openly competing to offer services that can take out a rival online business or to settle a score.

An ad for a DDoS attack service.

There are dozens of underground forums where members advertise their ability to execute debilitating “distributed denial-of-service” or DDoS attacks for a price. DDoS attack services tend to charge the same prices, and the average rate for taking a Web site offline is surprisingly affordable: about $5 to $10 per hour; $40 to $50 per day; $350-$400 a week; and upwards of $1,200 per month.

Of course, it pays to read the fine print before you enter into any contract. Most DDoS services charge varying rates depending on the complexity of the target’s infrastructure, and how much lead time the attack service is given to size up the mark. Still, buying in bulk always helps: One service advertised on several fraud forums offered discounts for regular and wholesale customers.

Continue reading →

Advertisement

Trojan Tricks Victims Into Transferring Funds

July 28, 2011
60 Comments

It’s horrifying enough when a computer crook breaks into your PC, steals your passwords and empties your bank account. Now, a new malware variant uses a devilish scheme to trick people into voluntarily transferring money from their accounts to a cyber thief’s account.

The German Federal Criminal Police (the “Bundeskriminalamt” or BKA for short) recently warned consumers about a new Windows malware strain that waits until the victim logs in to his bank account. The malware then presents the customer with a message stating that a credit has been made to his account by mistake, and that the account has been frozen until the errant payment is transferred back.

When the unwitting user views his account balance, the malware modifies the amounts displayed in his browser; it appears that he has recently received a large transfer into his account. The victim is told to immediately make a transfer to return the funds and unlock his account. The malicious software presents an already filled-in online transfer form — with the account and routing numbers for a bank account the attacker controls.

Continue reading →

Spam & Fake AV: Like Ham & Eggs

July 26, 2011
6 Comments

An explosion of online fraud tools and services online makes it easier than ever for novices to get started in computer crime. At the same time, a growing body of evidence suggests that much of the world’s cybercrime activity may be the work of a core group of miscreants who’ve been at it for many years.

I recently highlighted the financial links among the organizations responsible for promoting fake antivirus products and spam-advertised pharmacies; all were relying on a few banks in Azerbaijan to process credit card payments.

In this segment, I’ll look at the personnel overlap between the fake AV and pharma industries. The data is drawn from two places: a study done by researchers at the University of California, Santa Barbara (UCSB) that examined three of the most popular fake AV affiliate services which pay hackers to foist worthless software on clueless Internet users; and the leaked Glavmed/Spamit affiliate database, which includes the financial and contact information for many of the world’s top spammers and hackers.

UCSB researcher Brett Stone-Gross and I compared the ICQ instant message numbers belonging to affiliates from Glavmed/Spamit with the ICQ numbers used by affiliates of the largest of the fake AV programs measured by his research team. The result? 417 out of 998 affiliates who were registered with the fake AV distribution service — a whopping 42.2 percent — also were registered pharma spammers with Glavmed/Spamit.

Continue reading →

Calif. Co. Sues Bank Over $465k eBanking Heist

July 25, 2011
44 Comments

A California real estate escrow company that lost more than $465,000 in an online banking heist last year is suing its former financial institution, alleging that the bank was negligent and that it failed to live up to the terms of its own online banking contract.

The plight of Redondo Beach, Calif. based Village View Escrow, first publicized by KrebsOnSecurity last summer, began in March 2010. That’s when organized crooks broke into the firm’s computers and bank accounts, and sent 26 consecutive wire transfers to 20 individuals around the world who had no legitimate business with the firm.

Village View’s bank, Professional Business Bank of Pasadena, Calif., relied on third-party service provider NetTeller, which allowed commercial customers to authenticate to the bank’s site with little more than a username and password. Village View’s contract with Professional Bank stated that electronic transfers would only be allowed if they were authorized by two Village View employees, and confirmed by a call from specific Village View phone numbers.

The attack on Village View demonstrates the sophistication of malicious software like the ZeuS Trojan. The thieves disguised a banking Trojan as a UPS shipping receipt, and the company’s owner acknowledged opening the attachment and forwarding it to another employee who also viewed the malware-laced file. Once inside Village View’s systems, the attackers apparently disabled email notifications from the bank.

Nevertheless, Village View’s lawsuit challenges Professional Bank’s claims that its systems used “multi-factor,” and “state-0f-the-art” ebanking systems, and accuses the bank of negligence for not having procedures to help the company recover the fraudulent transfers.

Continue reading →

Comcast Hijacks Firefox Homepage: “We’ll Fix”

July 21, 2011
40 Comments

Comcast says it is revamping the software that new customers need to install to start service with the ISP. The software is unfriendly to Mac users running Firefox: It changes the browser’s homepage to comcast.net, and blocks users from changing it to anything else.

I heard this from a friend who’d just signed up for Comcast’s Xfinity high-speed Internet service and soon discovered some behavior on his Mac that is akin to Windows malware  — something had hijacked his Internet settings. The technician who arrived to turn on the service said that a software package from Comcast was necessary to complete the installation. My friend later discovered that his homepage had been changed to comcast.net, and that Comcast software had modified his Firefox profile so that there was no way to change the homepage setting.

I contacted Comcast; they initially blamed the problem on a bug in Firefox. Mozilla denies this, and says it’s Comcast’s doing.

Continue reading →

Google: Your Computer Appears to Be Infected

July 19, 2011
84 Comments

Google today began warning more than a million Internet users that their computers are infected with a malicious program that hijacks search results and tries to scare users into purchasing fake antivirus software.

Google security engineer Damian Menscher said he discovered the monster network of hacked machines while conducting routine maintenance at a Google data center. Menscher said when Google takes a data center off-line, search traffic directed to that center is temporarily stopped. Unexpectedly, Menscher found that a data center recently taken off-line was still receiving thousands of requests per second.

Screenshot of the image Google is displaying to notify users of infected PCs.

Menscher dug further and discovered the source of the traffic: more than a million Microsoft Windows machines were infected with a strain of malware designed to hijack results when users search for keywords at Google.com and other major search engines. Ironically, the traffic wasn’t search traffic at all: The malware instructed host PCs to periodically ping a specific Google Internet address to check whether the systems were online.

Menscher said the malware apparently arrives on victim desktops as fake antivirus or “scareware” programs that use misleading warnings about security threats to trick people into purchasing worthless security software. He suspects that the fake AV program either ships with or later downloads the search hijacker component.

Continue reading →

eBanking Theft Costs Town of Eliot, Me. $28k

July 19, 2011
26 Comments

Organized cyber thieves stole more than $28,000 from a small New England town last week. The case once again highlights the mismatch between the sophistication of today’s attackers and the weak security measures protecting many commercial online banking accounts.

On July 11, 2011, I alerted the town controller of Eliot, Maine that its accounts were probably being raided by computer crooks in Eastern Europe. I had heard from a “money mule,” an individual who was recruited through a work-at-home job scam to help the thieves launder money. He had misgivings about a job he had just completed for his employer. The job involved helping to move almost $5,000 from one of his employer’s “clients” to individuals in Ukraine. The receipt his employer emailed to him along with the money transfer said the client was “Town of Eliot, Ma.”

Norma Jean Spinney, the town controller, said she immediately alerted the town’s financial institution, TD Bank, but the bank couldn’t find any unusual transactions. Spinney said that three days later she received a call from TD Bank, notifying the town of a suspicious batch of payroll direct deposits totaling more than $28,000. TD Bank may have had a chance to stop this robbery, but apparently they dropped the ball.

Nevertheless, the town is not likely to see the stolen money again. Unlike consumers, organizations are not protected against online banking losses from cyber fraud. What’s more, a forensic analysis by a local IT firm showed that Spinney’s PC was infected with at least two banking Trojans at the time of the heist.

TD Bank spokeswoman Jennifer Morneau declined to discuss the incident, citing customer confidentiality policies.

Continue reading →

Microsoft Offers $250K Bounty for Rustock Author

July 18, 2011
6 Comments

Microsoft said today that it is offering a $250,000 reward for new information leading to the arrest and conviction of the individual(s) responsible for the Rustock botnet, a now-defunct crime machine that was once responsible for sending 40 percent of all junk email.

The bounty is the software giant’s latest salvo in its war on Rustock; Microsoft secured a major victory in March, when it worked with ISPs and security firms to launch a successful sneak attack against the botnet, knocking out its support infrastructure. Richard Boscovich, senior attorney for Microsoft’s digital crimes unit, said that although spam from Rustock-infected PCs has ceased, there are still hundreds of thousands of infected computers around the world to be cleaned of the botnet malware.

Microsoft's Rustock notice in The Moscow News, June 14

“This reward offer stems from Microsoft’s recognition that the Rustock botnet is responsible for a number of criminal activities and serves to underscore our commitment to tracking down those behind it,” Boscovich wrote in a post on the official Microsoft blog. “While the primary goal for our legal and technical operation has been to stop and disrupt the threat that Rustock has posed for everyone affected by it, we also believe the Rustock bot-herders should be held accountable for their actions.”

Microsoft recently ran advertisements in major newspapers in Moscow and St. Petersburg, as part of a deal the company struck with a U.S. court to help dismantle Rustock; the court granted Microsoft dominion over the Rustock control servers and domains as long as the company made a “good faith” effort to notify the unidentified owners.

Continue reading →

Apple’s i-Patches Fix Critical iOS Flaws

July 18, 2011
4 Comments

Apple has issued a software update that fixes at least three serious security holes in supported versions of its iPhone, iPad, iPod and iPod Touch devices.

The patch targets security weaknesses in the way iOS devices render PDF files. Experts have been warning that attackers could leverage the flaws to install software without warning or permission if users were to merely browse to a malicious site. The update fixes the same vulnerabilities that jailbreakme.com has been using to help people jailbreak Apple’s i-devices.

The Apple update — iOS 4.2.9 or iOS 4.3.4, depending on your device — can be downloaded only from within iTunes. If you are planning to jailbreak your device, visit jailbreakme.com, and then apply the unofficial patch that the Dev-Team released to help jailbreakers protect their phones from further abuse of the vulnerabilities.