http://www.securelist.com/en/analysis/204792206/Monthly_Malware_Statistics_November_2011Mac OS threats
Windows users are unlikely to find anything unusual about Trojans and worms on websites that are spread by pirate versions of popular software. But for Mac users this is still a bit of a novelty. At the very end of October a new malicious program – subsequently named Backdoor.OSX.Miner – was detected on torrent trackers spreading pirate versions of programs for Mac. This program has a number of malicious functions:
Establishes remote access to an infected computer
Gathers information about browsing history in Safari
Captures screenshots
Steals the wallet.dat file from BitCoin clients
Launches BitCoin miner without user authorization
This piece of malware spreads via a number of torrent trackers, including publicbt.com, openbittorrent.com and thepiratebay.org.