Antichat Hacker Forum Breach Reveals Weak Passwords

June 22, 2011
38 Comments

Ordinary Internet users frequently are scolded for choosing weak, easily-guessed passwords. New research suggests that hackers in the cyber underground are also likely to pick lame passwords for their favorite online forums.

Last month, KrebsOnSecurity was sent a massive database file that the source said was the user database of Antichat.ru, a Russian language hacker forum that has attracted more than 41,000 users since its founding nearly a decade ago. By matching the user names in the database with those listed in the public pages of the forum, I discovered that I’d been given a snapshot of all Antichat user information and private messages prior to June 2010, when Antichat.ru apparently experienced a forum compromise.

I wanted to match the Antichat user names, associated email and ICQ addresses with those of other forums for which I’ve collected user databases. I also wanted to see how many of the passwords were easily crackable. To do this, I enlisted the help of an anti-spam source that has access to some serious hardware and software capable of cracking thousands of passwords per hour.

More than 18,000 of the 41,037 passwords in the database were crackable within a few days. 4,500 passwords were used by five or more individual users.

The most easily-guessed passwords were six characters long or less, and 75 percent of the top 20 most common simple passwords were uncomplicated number strings. More than three percent of Antichat users whose passwords were cracked (567) picked one of the simplest passwords, “123456”; 1.77 percent (322) chose “111111”; Just over 1 percent selected “123123”. Another 196 users opted for “qwerty,” a common meme easily typed from left to right across a keyboard. Sixty-five Antichat users picked a single-character password: “0.”

Although nearly half of the Antichat user passwords were crackable, the passwords aren’t useful for gaining access to Antichat user accounts: Forum administrators have changed the site’s login process to automatically tie the user’s credentials to his or her Internet address. However, the Internet address data tied to each account may be of interest to law enforcement investigators.

Continue reading →

FBI Scrubbed 19,000 PCs Snared By Coreflood Botnet

June 21, 2011
17 Comments

The FBI has scrubbed some 19,000 PCs that were infected with the Coreflood bot malware, the agency told a federal court last week. The effort is part of an ongoing and unprecedented legal campaign to destroy one of the longest-running and most menacing online crime machines ever built.

In April, the Justice Department and the FBI were granted authority to seize control over Coreflood, a criminal botnet that enslaved millions of computers. On April 11, 2011, the U.S. Attorney’s Office for the District of Connecticut was granted authority to seize 29 domain names used to control the daily operations of the botnet, and to redirect traffic destined for the control servers to a substitute server that the FBI controlled. More significantly, the FBI was awarded a temporary restraining order allowing it to send individual PCs infected with Coreflood a command telling the machines to stop the bot software from running.

In a declaration filed with the district court, FBI special agent Kenneth Keller said the bureau has issued approximately 19,000 uninstall commands to infected computers of two dozen identifiable victims in the United States. The FBI said it obtained written consent from all 24 victims, and that none reported any adverse or unintended consequences from the uninstall commands.

Continue reading →

Advertisement

Software Cracks: A Great Way to Infect Your PC

June 20, 2011
49 Comments

I often get emails from people asking if it’s safe to download executable programs from peer-to-peer filesharing networks. I always answer with an emphatic “NO!,” and the warning that pirated software and cracks — programs designed to generate product keys or serial numbers for popular software and games — are almost always bundled with some kind of malware. But I seldom come across more than anecdotal data that backs this up.

Recently, I heard from Alfred Huger, vice president of engineering at Immunet, an anti-virus company recently purchased by Sourcefire. Huger was reaching out to offer feedback on my 3 Rules for Online Safety post. He told me that the rules should have included this warning: Do not download pirated software and cracks from filesharing networks and cracks sites because they are a major source of malware infections.

I replied that people who knowingly engage in this type of risky behavior probably don’t care much about my three rules, and that the advice was meant for people who were interested in learning how to stay safe online. But I was curious about his comment, and asked if he had data to support it. Huger said these types of infections were closely correlated with cases in which Immunet users opted to dispute its malware detection for specific files. Files that are “convicted” by anti-virus programs are considered malicious and are placed in a quarantine area on the user’s system. But if users still want to access the file, or they don’t believe or care that it’s malicious, they can reverse or “roll back” that conviction.

“A roll back to us is a file which we convicted but people disagreed with the conviction and rolled it out of quarantine,” Huger said. “About 90% of the false positive roll backs I see which result in more than 10 convictions  — meaning more than 10 people rolled it back, turn out to be real malware. In almost every case when I can actually track down the user and ask why they rolled it back I am told it was a crack or pirated material of some type. They went looking for it and installed it.

Continue reading →

Court Favors Small Business in eBanking Fraud Case

June 17, 2011
33 Comments

Comerica Bank is liable for more than a half a million dollars stolen in a 2009 cyber heist against a small business, a Michigan court ruled. Experts say the decision is likely to spur additional lawsuits from other victims that have been closely watching the case.

Judge Patrick J. Duggan found that Dallas-based Comerica failed to act “in good faith” in January 2009, when it processed almost 100 wire transfers within a few hours from the account of Experi-Metal Inc. (EMI), a custom metals shop based in Sterling Heights, Mich. The transfers that were not recovered amounted to $560,000.

“A bank dealing fairly with its customer, under these circumstances, would have detected and/or stopped the fraudulent wire activity earlier,” Duggan wrote. Judge Duggan has yet to decide how much Comerica will have to pay.

The problems for Experi-Metal started when company controller Keith Maslowski responded to an e-mail that appeared to be from its bank, Comerica. The message said the bank needed to carry out scheduled maintenance on its banking software, and instructed the EMI employee to log in at a Web site that appeared to be Comerica’s online banking site. Maslowski said the email resembled the annual e-mails Comerica used to send, prompting customers to renew EMI’s digital certificates.

The year before the cyber theft, Comerica had switched from using digital certificates to requiring commercial customers to enter a one-time passcode from a security token. The site linked to in the e-mail asked for that code, and Maslowski complied. Within the span of a few hours, the attackers made 97 wire transfers from EMI’s account to bank accounts in China, Estonia, Finland, Russia and Scotland.

Comerica became aware of the fraudulent transfers four hours after the attack began. Although it took steps to isolate Experi-Metal’s account, the bank also failed to stop more than a dozen additional fraudulent transfers from the company’s account after the bank’s initial response. Experi-Metal sued the bank after it refused to cover any of the losses.

Continue reading →

Microsoft Patches Fix 34 Security Flaws

June 15, 2011
19 Comments

Microsoft on Tuesday released 16 software updates to fix at least 34 security vulnerabilities in its Windows operating systems and other software. More than half of the updates address flaws Microsoft rates “critical,” meaning the bugs can be exploited with little to no user interaction.

For organizations that need to test patches before deploying them, Microsoft said four of the updates deserve priority:

  • MS11-042 (DFS). This bulletin resolves two privately reported issues affecting all versions of Windows.
  • MS11-043 (SMB Client). This bulletin resolves one privately reported issue affecting all versions of SMB Client on Windows.
  • MS11-050 (Internet Explorer). This security bulletin resolves 11 privately reported issues in Internet Explorer.
  • MS11-052 (Windows). This bulletin resolves one privately reported issue in Windows and is also Critical.

Another update, labeled “important,” fixes at least eight security problems in all versions of Microsoft Excel, including Office for Mac.

More information on this week’s updates is available at this summary. Updates are available from Windows Update and via Automatic Updates. You may want to set aside some time for this update package: Among the critical patches is an update for Microsoft’s .NET software, and .NET updates are typically bulky. If you experience problems after applying any of the updates, please leave a note about it in the comments below.

Adobe Ships Security Patches, Auto-Update Feature

June 14, 2011
43 Comments

Adobe today issued more than a dozen security updates for its Acrobat and PDF Reader programs, including a feature update that will install future Reader security updates automatically. In addition, Adobe has shipped yet another version of its Flash Player software to fix a critical security flaw.

No doubt some will quibble with Adobe’s move toward auto-updating Reader: There is always a contingent in the user community who fear automatic updates will at some point force a faulty patch. But for better or worse, Adobe’s Reader software is the PDF reader software of choice for a majority of Windows computers in use today. Faced with incessant malware attacks against outdated versions of these programs, it seems irresponsible for Adobe to do anything other than offer auto-update capability to to Reader users more aggressively.

Adobe debuted this feature in April 2010, but at that the time Adobe decided to continue to honor whatever update option users had selected (the default has always been “download all updates automatically and notify me when they are ready to be installed”). With this latest update, Adobe will again prompt users to approve an auto-update choice, except this time the option pre-selected will be “Install Updates Automatically.”

Continue reading →

Organization Chart Reveals ChronoPay’s Links to Shady Internet Projects

June 13, 2011
24 Comments

An online criminal enterprise, as tightly structured as any legitimate business corporation, was exposed in 2010. Emails and documents taken from employees of ChronoPay — Russia’s largest online payments processor — were shared with a select group of law enforcement agencies and with KrebsOnSecurity.com. The communications provide the strongest evidence yet that a notorious rogue online pharmacy and other shady enterprises are controlled by ChronoPay executives and employees.

The leaked ChronoPay emails show that in August 2010 co-founder Pavel Vrublevsky authorized a payment of 37,350 Russian Rubles (about $1,200) for a multi-user license of an Intranet service called MegaPlan.  The documents indicate that Vrublevsky used the service to help manage the sprawling projects related to ChronoPay’s “black” operations, including the processing of payments for rogue anti-virus software, violent “rape” porn sites, and knockoff prescription drugs sold through hundreds of Web sites affiliated with a rogue online pharmacy program Rx-Promotion.com.

ChronoPay employees used their MegaPlan accounts to track payment processing issues, order volumes, and advertising partnerships for these black programs. In a move straight out of the Quentin Tarantino film Reservoir Dogs, the employees adopted nicknames like “Mr. Kink,” “Mr. Heppner,” and “Ms. Nati.” However, in a classic failure of operational security, many of these folks had their messages automatically forwarded to their real ChronoPay email accounts.

MegaPlan offers an application that makes it simple for clients to create organizational charts, and the account paid for by ChronoPay includes a chart showing the hierarchy and reporting structure of its dark divisions.

A screen shot of the organization chart from ChronoPay’s MegaPlan Intranet system.

Continue reading →

FBI Investigating Cyber Theft of $139,000 from Pittsford, NY

June 10, 2011
65 Comments

Computer crooks stole at least $139,000 from the town coffers of Pittsford, New York this week. The theft is the latest reminder of the widening gap between the sophistication of organized cyber thieves and the increasingly ineffective security measures employed by many financial institutions across the United States.

The attack began on or around June 1, 2011, when someone logged into the online commercial banking account of the Town of Pittsford, a municipality of 25,000 not far from Rochester, N.Y. The thieves initiated a small batch of automated clearing house (ACH) transfers to several money mules, willing or unwitting individuals in the U.S.A. who had been recruited by the attackers prior to the theft. The mules pulled the money out of their bank accounts in cash and wired it to individuals in Saint Petersburg, Russia and Kiev, Ukraine via transfer services Western Union and Moneygram.

Over the next four business days, the thieves initiated another three fraudulent batch payments to money mules. Some transfers went to money mules who owned businesses, such as a $14,750 payment to Mission Viejo, Calif. based Art Snyder Software. Most money mules were sent payments of less than $5,000.

Pittsford town supervisor William Carpenter said the FBI is investigating the incident, and that many of the details of how the attackers got in remain unclear. He said the FBI told him the thieves most likely stole the town’s online banking password using a banking Trojan. He added that the town has recovered just $4,800 of the stolen funds, the proceeds of a single transfer. I left a message with the FBI field office in New York but haven’t yet heard back.

“We have good firewalls and anti-virus software, and we weren’t at all lax in our security systems,” Carpenter said. “We thought we were pretty secure.”

Carpenter said the fraud went undetected for days. He said the town normally does its direct deposit payroll bi-weekly on Wednesdays, and that the first fraudulent transfers happened during a non-payroll week.

Continue reading →

Pay-Per-Install a Major Source of Badness

June 9, 2011
12 Comments

New research suggests that the majority of personal computers infected with malicious software may have arrived at that state thanks to a bustling underground market that matches criminal gangs who pay for malware installs with enterprising hackers looking to sell access to compromised PCs.

One of the PPI programs profiled in the study.

Pay-per-install (PPI) services are advertised on shadowy underground Web forums. Clients submit their malware—a spambot, fake antivirus software, or password-stealing Trojan—to the PPI service, which in turn charges rates from $7 to $180 per thousand successful installations, depending on the requested geographic location of the desired victims.

The PPI services also attract entrepreneurial malware distributors, or “affiliates,” hackers who are tasked with figuring out how to install the malware on victims’ machines. Typical installation schemes involve uploading tainted programs to public file-sharing networks; hacking legitimate websites in order to automatically download the files onto visitors; and quietly running the programs on PCs they have already compromised. Affiliates are credited only for successful installations, via a unique and static affiliate code stitched into the installer programs and communicated back to the PPI service after each install.

In August 2010, researchers at the University of California, Berkeley, and the Madrid Institute for Advanced Studies in Software Development Technologies infiltrated four competing PPI services by surreptitiously hijacking multiple affiliate accounts. They built an automated system to regularly download the installers being pushed by the different PPI services.

The snippet above is the introduction to a story I wrote for MIT Tech Review. Read the whole piece at this link.

Ads for Monocash, a 3-year-old PPI program that distributes the Zlob malware

Court: Passwords + Secret Questions = ‘Reasonable’ eBanking Security

June 8, 2011
126 Comments

A closely-watched court battle over how far commercial banks need to go to protect their customers from cyber theft is nearing an end. Experts said the decision recommended by a magistrate last week — if adopted by a U.S. district court in Maine — will make it more difficult for other victim businesses to challenge the effectiveness of security measures employed by their banks.

In May 2009, Sanford, Maine based Patco Construction Co. filed suit against Ocean Bank, a division of Bridgeport, Conn. based People’s United Bank. Pacto used online banking primarily to make weekly payroll payments. Patco said cyber thieves used the ZeuS trojan to steal its online banking credentials, and then heisted $588,000 in batches of fraudulent automated clearing house (ACH) transfers over a period of seven days.

In the weeks following the incident, Ocean Bank managed to block or claw back $243,406 of the fraudulent transfers, leaving Patco with a net loss of $345,445. Because the available funds in Patco’s account were less than the total fraudulent withdrawals, the bank drew $223,237 on Patco’s line of credit to cover the transfers. Patco ended up paying interest on that amount to avoid defaulting on its loans.

Patco sued to recover its losses, arguing in part that Ocean Bank failed to live up to the terms of its contract when it allowed customers to log in to accounts using little more than a user name and password. On May 27, a magistrate recommended that the court make Patco the loser by denying Pacto’s motion for summary judgment and granting the bank’s motion.

David Navetta, a founding partner of the Information Law Group, said that Patco has about another week to dispute the magistrate’s recommendations, but that it is unlikely that the judge overseeing the case will overturn the magistrate’s findings.

Navetta said the magistrate considered the legal issues and propounded an analysis of what constitutes “commercially reasonable” security.

“Many security law commentators, myself included, have long held that reasonable security does not mean bullet-proof security, and that companies need not be at the cutting edge of security to avoid liability,” Navetta said. “The court explicitly recognizes this concept, and I think that is a good thing.”

But Avivah Litan, a fraud and bank security analyst at Gartner, took strong exception to the way the magistrate arrived at the recommended decision, calling it “an outrage.”

“In my opinion, this is frankly an egregious injustice against small U.S. businesses,” Litan said. “It is also a complete failure of the bank regulatory system in the United States, which should come as no surprise, given the history of the regulators in the 21st century.”

Continue reading →