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CryptoLocker on Win 2008 R2 Terminal Server


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#1 ticomoose

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Posted 01 October 2013 - 09:44 PM

I have a client with a Win2008 R2 Terminal Server.  Last week Thursday, one of the users got pop ups for ransomware.  My helpdesk didn't think too much of it; the tech ran MBAM and thought he had it cleaned out.  The next day, it was back and affecting additional user profiles. It got escalated to me.  I ran MBAR and HitmanPro, and thought I had rooted it all out.  Unfortunately, we discovered that this was the CryptoLocker trojan; that the user had originally opened an infected email message on 9/18, and that by the time he started getting the ransomware pop ups on 9/26, several network shares were already encrypted. 

 

We've got good backups so i can restore the data back prior to the encryption point, and am in the process of doing so.  I've also run a scan using MBAR and Combofix on every PC and laptop on their network that I can get my hands on - that caveat because our primary contact thinks he's above all this and won't allow us to have our agent software on his machine, and there's one other machine that he doesn't even know who is using it or where it is.  I think I've got all the PCs stable and can vouch for the fact that they are not the source of the encryption; it really did originate with this user on the terminal server.  

 

My problem is this: after all this work, and 5 days into it, I discovered a new EXE in the appdata folder of the user originally infected.  So obviously, I haven't rooted the thing out of the terminal server completely yet.  And combofix won't run on a server.  

 

Can someone help me dig through this server, or shall I just throw in the towel and rebuild it at this point?

 

Laura



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