The mysterious Avatar rootkit, detected by ESET as Win32/Rootkit.Avatar, appears to reflect a heavy investment in code development, with an API and a SDK available, plus an interesting abuse of Yahoo Groups for C&C communications.

Technical analysis of Power Loader, a special bot builder for making downloaders for other malware families and yet another example of specialization and modularity in malware production.

We have just completed fresh analysis of the malicious software known as Win32/Festi. While the "Festi" botnet created with this malware has been in business since the autumn of 2009 we can see that the software is frequently updated, as described in our analysis, and these updates mean Festi continues to be a potent threat

The Flashback trojan has been all over the news lately, but it is not the only Mac malware threat out there at the moment. A few weeks ago, we published a technical analysis of OSX/Lamadai.A, the Mac OS X payload of a multi-platform attack exploiting the Java vulnerability CVE-2011-3544 to infect its victims. OSX/Lamadai.A has

The biggest Mac botnet ever encountered, the OSX/Flashback botnet, is being hit hard. On April 12th, Apple released a third Java update since the Flashback malicious code outbreak. This update includes a new tool called MRT (Malware Removal Tool) which allows Apple to quickly push malware removal code to their user base. The first mission

Earlier this month, researchers from AlienVault and Intego reported a new malware attack targeting Tibetan NGOs (Non-Governmental Organizations). The attack consisted of luring the victim into visiting a malicious website, which then would drop a malicious payload on the target’s computer using Java vulnerability CVE-2011-3544 and execute it. The webserver would serve a platform-specific JAR

Yesterday’s announcement by the US Department of Justice that the operators of file-sharing site Megaupload had been indicted for operating a criminal enterprise that generated over $175 million by trafficking in over half a billion dollars of pirated copyrighted material has sent shockwaves across the Internet.  The accuracy of those figures may be questionable, but

Nearly three years old, the Conficker worm continues to pose a threat to PCs. Aryeh Goretsky wants to know why this is, and what can be done about it.

The TDSS botnet, now in its 4th generation, is seriously sophisticated malware, which is why we've spent so much time writing about it: the revision of the paper The Evolution of TDL: Conquering x64 that will be up on the white papers page shortly runs to 54 pages and includes some highly technical analysis, including the detail on

Recently … our TDL tracker picked up a brand new plugin for TDL4 kad.dll (Win32/Olmarik.AVA) which we haven’t seen earlier … we discovered that it implements a particularly interesting network communication protocol …