New variant of Boonana Trojan (trojan.osx.boonana.b) discovered
SecureMac Release
Related: Boonana Trojan Horse Analysis
Posted: November 4th, 2010
Security Risk: Critical
A new variant of the Boonana malware, first documented and named by SecureMac, has been discovered by ESET. The new variant, trojan.osx.boonana.b, behaves in a very similar manner to the original malware, and is currently being distributed on multiple sites. In addition to the website documented by ESET as currently distributing the malware, SecureMac has identified two more websites that are currently hosting the new malware variant. Rather than the initial site which tricks users into running (and installing) the malware, these servers seem to be hosting update code for the malware. The infected machines contact these servers looking for updates to the malware payload. At the time of analysis (November 2nd, 2010), these servers were live, and distributing malware.
In addition to the malware updates, these servers contain what appear to be keystroke logs from infected machines, including usernames and passwords.
With a quick glance, Boonana may look like a variant of Koobface, which was discovered for Windows back in 2008. However, ESET has also confirmed SecureMac's initial analysis of Boonana as a new unique piece of malware, which does not share a common code-base with the previously discovered Koobface worm. ESET's threat analysis of Boonana can be found at:
http://blog.eset.com/2010/10/31/boonana-threat-analysisAdditionally, Microsoft identifies the malware as Trojan:Java/Boonana, and rates it as a severe threat for both Mac and Windows:
http://www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Trojan%3AJava%2FBoonanaMicrosoft's analysis of the OS X version of Boonana, also with a severe threat level, can be found at:
http://www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Trojan%3AMacOS_X%2FBoonanaAnother security vendor has verified that the Boonana malware is capable of infecting Linux machines, and will proceed to join a botnet once installed. The malware also affects Mac OS X and Microsoft Windows.
SecureMac's free Boonana Trojan Removal Tool can detect and remove the threat for Apple's Mac OS X; manual removal instructions are included in the SecureMac writeups. This free Boonana Trojan Horse Removal Tool (
http://www.securemac.com/boonana/ ) runs on Mac OS X 10.5 and higher - Download from Users may also run MacScan Security and Privacy software (
http://www.securemac.com/ ) for Mac OS X to detect the Boonana Trojan Horse. MacScan runs on Mac OS X 10.2.4 or higher and includes a free 30-day trial. Existing users are encouraged to download the latest malware definitions before scanning.
Any iMac users...so far it supposedly has 'only' affected a few thousand machines, but its still clearly doing the rounds
Up to now I've never had any anti virus software on my Mac but I thinks it's time to install it now.
Securemac is £35 and I think around £20 a year to keep it updated. I use this one ..it's Free ....
http://www.sophos.com/products/free-tools/free-mac-anti-virus/ 
