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Crypto Blocker & dllhost.exe overun


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#1 blewsman

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Posted 11 September 2013 - 05:46 PM

Hello and thanks for reading.

 

Yesterday, I was experiencing sluggish behaviour when a screen for "antivirus security pro" popped up. I immediately ran malwarebytes. A half dozen or so issues came up and were cleaned.

 

I rebooted successfully, but performance was still at a crawl. Task mgr showed >dozen entries for dllhost.exe described as COM Surrogate in the processes. They were chewing up >80% of memory and cpu. I tried to end the processes, but they came back immediately.

 

I also noticed two identical processes named [{long random alphanumeric}].exe running. Moments later, the Crypto Blocker screen came up with a timer, saying something about encrypted files.

 

I immediately ran malwarebytes again. It cleaned a few more files and some registry edits. When I rebooted, the Crypto screen was gone and the mysterious processes no longer running in tsk mgr.

 

dllhost.exe issue persisted and I noticed my files (mostly Office files) were corrupted.

 

Additionally, none of my Office programs will load anymore. It seems like they are trying to "reinstall" themselves when I click on their icon (Windows installer > "preparing to install"). The installation  seems to get hung up and gets a "fatal error with shortcut" -> then cancels.

 

I have also run malwarebytes anti-rootkit. It picked up ~6 entries on the first pass. Each subsequent pass picks up a single entry, "cleans it" but issue reappears on next scan.

 

I am happy to provide the mbam/mbar logs if they would be useful.

 

Any suggestions on how to:

  • completely rid my computer of the malware
  • fix the dllhost.exe memory drain
  • launch my MS Office programs

 

Many, many thanks!

 

David



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#2 blewsman

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Posted 11 September 2013 - 08:08 PM

Sorry, meant Crypto Locker..not Blocker.

 

:wink:



#3 Broni

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Posted 12 September 2013 - 08:22 PM

Unfortunately this case is pretty much hopeless.
Removal of the above infection is fairly easy but it won't decrypt encrypted files.
You can read more here: http://www.technibble.com/forums/showthread.php?p=392636 and in posted there links.

If you don't have a proper backup your only choice is to pay up (I wouldn't) or format hard drive and reinstall Windows.


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#4 blewsman

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Posted 12 September 2013 - 10:40 PM

Thanks Broni.

 

I have already deleted the encrypted files and do have a backup.

 

However, my computer is nearly inoperable due to the dllhost.exe memory leak. Is this a known side effect of crilock? Any suggestions on getting my computer back to normal working order?



#5 Broni

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Posted 12 September 2013 - 10:53 PM

Please follow the instructions in THIS GUIDE starting at Step 6. If you cannot complete a step, skip it and continue.

Once the proper logs are created, then make a NEW TOPIC and post it HERE. Please include a description of your computer issues, what you have done to resolve them, and a link to this topic.

If you can produce at least some of the logs, then please create the new topic and explain what happens when you try to create the log(s) that you couldn't get. If you cannot produce any of the logs, then still post the topic and explain that you followed the Prep. Guide, were unable to create the logs, and describe what happens when you try to create the logs.

It would be helpful if you post a note here once you have completed the steps in the guide and have started your topic in malware removal. Good luck and be patient.

If HelpBot replies to your topic, PLEASE follow Step One so it will report your topic to the team members.


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