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New Malware Takes ‘Extended Naps’ To Avoid Detection

New Malware Takes ‘Extended Naps’ To Avoid Detection

It’s a truism that even the bleakest circumstances look a bit brighter after a good nap. Well, that wisdom isn’t lost on malware authors either. A newly discovered Trojan Horse program, dubbed Trojan Nap, is programmed to use extended sleep cycles to fool behavior based anti-malware tools, according to a report from the firm FireEye. In a blog post Tuesday, researchers Abhishek Singh and Ali Islam said the new malware has a function, dubbed SleepEx() that can be used to configure long “naps” that the malware takes after it is installed on a compromised system. The default value, 600,000 milliseconds – or 10 minutes – seems designed to fool automated analysis systems that are programmed to capture a sample of behavior for a set time frame. “By executing a sleep call with a long timeout, Nap can prevent an automated analysis system from capturing its malicious behavior,” FireEye said. Like other […]

You’ve Been Hacked By APT! (The Video)

You’ve Been Hacked By APT! (The Video)

The whole APT – or “Advanced Persistent Threat” – meme has received a lot of attention in the media. This site and others have written about APT-style hacks, such as the recent compromise at The New York Times. But what does an APT hack look like? And what would it mean if you or your employer were in the crosshairs of an APT-type actor? The SANS Institute’s Securing The Human project has put together a nice training video that helps answer some of these questions, and to explain how APT-style attacks work. This is good stuff – explaining the difference between cyber crime and APT, and generic enough that any organization could use it as a training video. SANS says that it will produce one of these a month, and post them on the first of each month. My only criticism here is that, after they do a solid job describing […]

Researchers: Hole In TLS Encryption Could Expose Secure Web Sessions

Researchers: Hole In TLS Encryption Could Expose Secure Web Sessions

Researchers at the University of London are going public with a paper that claims to have found a flaw in the specification for Transport Layer Security (TLS) that could leave supposedly secure Web, IM, VoIP and other online sessions exposed to prying eyes. The researchers, Nadhem Al Fardan and Kenny Patterson of the Information Security Group at Royal Holloway, University of London said that the security hole stem from a flaw in the TLS specification, rather than a bug in how TLS is implemented. The two researchers have developed proof of concept attacks that take advantage of the flaw, and that could be used to recover a complete block of TLS-encrypted plaintext, the researchers said. Al Fardan is a Ph.D student in the Information Security Group. Patterson is a professor of Information Security there. The two have  discovered other, serious holes in TLS before. Notably: the two discovered a critical […]

Friday Night Massacre: Twitter Hacked, Info on 250k Exposed

Friday Night Massacre: Twitter Hacked, Info on 250k Exposed

What better time to drop some really bad and embarrassing news than late on a Friday afternoon, as everyone is heading out the door? So it was with social media giant Twitter, which dropped a bombshell late Friday: revealing that it had been compromised in an “extremely sophisticated” attack that yielded the account credentials for around 250,000 users. A blog post by Twitter Security Team member Bob Lord on Friday said that the company has been investigating the breach all week long, after detecting unusual patterns of account access across its network. After stopping an attack that was in progress, the company’s investigation revealed that the attackers “may have had access to limited user information – usernames, email addresses, session tokens and encrypted/saltedversions of passwords – for approximately 250,000 users,” Lord wrote. Twitter did not discuss the circumstances of the breach, but reiterated guidance from the U.S. Department of Homeland Security for users to disable Java […]

Weekend Security Reads – Our Picks

Weekend Security Reads – Our Picks

This was another eventful news week in the security world – stories about hacks on two, prominent newspapers, and a widespread hole in UPnP, a technology that all of us use, but never pay much attention to. (Always a dangerous combination.) Let’s face it, Friday is a time for decamping from the office, not taking on some weighty new mental project or thought provoking issue. But, come Sunday morning over coffee, you might just be ready to switch your higher cognitive functions on again. If so, here are some Security Ledger picks for good weekend reads: Hacking the Old Gray Lady – Slate.com The top security story this week was the string of revelations about sophisticated, targeted attacks against leading U.S. newspapers, including The New York Times and The Wall Street Journal. The Washington Post may also have been infiltrated, according to a report on Krebsonsecurity.com. The attacks by so-called […]