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Server apparently infected with ransom trojan


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#1 Gdinero

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Posted 22 February 2012 - 04:22 PM

I have a server running Windows 2003 SBS with the same infection as the one listed in this post: http://www.bleepingcomputer.com/forums/topic443725.html. Upon booting into Windows, I can see the desktop for a moment before it loads the splash screen asking me to send money for a code to unlock the system. Attempting to open Task Manager using ctrl-alt-del or open the run dialog using win+r works but both dialogs are obscured by the splash screen and there appears to be no way to get around it. Booting in any form of safe mode doesn't work; the system just resets itself a few seconds after choosing safe mode in the boot menu. This may be unrelated to the infection. I've been able to run Autoruns in offline mode (booting into Windows PE) and found the following entry under HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run: C:\ProgramData\local\svchost.exe. In addition to this file, two other files are in this directory: aescrypter.exe and undxkpwvlk.dll. There is another, apparently related file in another directory by itself: C:\decrypt\decrypt.exe. I've tried deleting the startup entry in the registry, renaming the directories and files, and deleting the directories, but nothing works. Upon reboot the files and registry entry are recreated and the system remains locked.

Also, this infection has apparently gone through the hard disk and possibly encrypted most (if not all) documents, images, and other data files it could find. These files now have a .aes extension (i.e. file.ext is now file.ext.aes).

The system was scanned by someone else using Windows Defender Offline, but unfortunately that person failed to record what was detected and cleaned. I ran a scan with Kaspersky Rescue 10 (usb) this morning, and it found no infected files.

Thanks for any help you can provide, and apologies if I didn't follow the proper format or post in the proper forum, as I was unable to run anything from the host OS and it was unclear what to do in this case.

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#2 HelpBot

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Posted 28 February 2012 - 04:25 PM

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#3 HelpBot

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Posted 28 February 2012 - 04:47 PM

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