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SophosLabs analyzed the sample we received and determined that it is a variant of a well-known remote-access trojan for Windows known as darkComet.
The Mac version is very basic and there appears to be a mix of German and English in the user interface. Its functions include:
* Placing text files on the desktop
* Sending a restart, shutdown or sleep command
* Running arbitrary shell commands
* Placing a full screen window with a message that only allows you to click reboot
* Sending URLs to the client to open a website
* Popping up a fake "Administrator Password" window to phish the target
Here is an excerpt from the default text that is displayed in the full screen window with the reboot button:
"I am a Trojan Horse, so i have infected your Mac Computer. I know, most people think Macs can't be infected, but look, you ARE Infected!SophosLabs has published protection for our customers as OSX/MusMinim-A. Trojans like this are frequently distributed through pirated software downloads, torrent sites, or anywhere you may download an application expecting to need to install it.
I have full controll over your Computer and i can do everything I want, and you can do nothing to prevent it.
So, Im a very new Virus, under Development, so there will be much more functions when im finished."
It could also be dropped by a vulnerability in your browser, plugins and other applications. Patching is an important part of protection on all platforms.
Fortunately our products can detect and remove Trojans like this, and for home use they're free! If you would like to install Sophos Anti-Virus for Mac Home Edition, click on the banner below.
Free Anti-Virus for Mac
Download Sophos Anti-Virus for Mac Home Edition