Jnanabot, a botnet that attacks Mac and Linux

*It's difficult to believe these marauders are entirely serious, since every machine infected announces its owner's suicide. That's not exactly discreet behavior.

http://www.theregister.co.uk/2011/01/19/mac_linux_bot_vulnerabilities/

(...)

"The bot was discovered spreading over Facebook posts that planted the following message on infected users' Facebook pages: “As you are on my friends list I thought I would let you know I have decided to end my life.” An included link leads recipients to a cross-platform JAR, or Java Archive file that can run on Windows, Mac, or Linux. Once the recipient is infected, his Facebook page carries the same dire warning."

(((Nevertheless, it's a remarkably capable and ecumenical piece of malware:)))

"Known as Trojan.Jnanabot, or alternately as OSX/Koobface.A or trojan.osx.boonana.a, the bot made waves in October when researchers discovered its Java-based makeup allowed it to attack Mac and Linux machines, not just Windows PCs as is the case with most malware. Once installed, the trojan components are stored in an invisible folder and use strong encryption to keep communications private.

"The bot can force its host to take instructions through internet relay chat, perform DDoS attacks, and post fraudulent messages to the victim's Facebook account, among other things...."