Intego has discovered a new version of the Imuler Trojan horse, which was first discovered in September 2011. Right now the risk is considered to be low – a sample of this malware was found on the VirusTotal website in a ZIP archive named “your dirty pics.zip.” Inside the ZIP file is an application with an icon making it look like an image.
If the file is run, ===> it installs a backdoor without the need for an admin password. <===
Read more:
http://www.intego.com/mac-security-blog/new-imuler-variant-found-steer-clear-of-your-dirty-pics/
Via Gust MEES