Cryptolocker virus infection

Hello Experts,

A client of ours has been hit with a cryptolocker virus. The client uses a Domain controller running Server 2003 which we are in the process of upgrading.

They also use drop box & recently this has been compromised.

Attached are the file types which are contained in each subfolder that has been encrypted.

We are currently running Sophos Enterprise 5.2.1 R2. Any advice would be appreciated as we are unable to restore unless we pay the ransom fee.
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Unfortunately there I don't know of any fix for this except to reimage from backup.  Do your client have a solid daily backup in place?

There is no attachment.  Can you repost?  Thanks.
unrealone1Author Commented:
Please find the image attached. We have checked our backup retention period & this runs up to 14 days only. The infection occurred on the 17th of Sept
Sorry, I haven't been able to confirm that anyone is ever successful at decrypting files encrypted by CryptoLocker.  However, you can try this:

Please be aware of the risk of losing the files forever and do it at your own risk.
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Sorry - I know you'd like to find a simple fix... but there's likely not one.  If you were infected with an OLD cryptolocker version then the keys are publicly available... if not, you have to pay.  And then you need to rethink your backups.  Cryptolocker is not a new kind of attack - it's been around over 2 years.

Keep in mind people doing these attacks are constantly learning from their "mistakes" - and making it harder and harder to recover.
andreasSystem AdminCommented:
yes in most cases you only have the 2 choices. restore from backup OR pay the ransom.
But if the attack was comming from ONE of the clients and the client the nexcrypted files on the server, you might have a chance to find some older versions of some files in the volume shadow copy of the server.

As the virus was not running on the server it may not have turned off the shadow copy service there.
If attacker somehow got domain admin then he also can turn off on server. In that case you need to resetup your ENTIRE domain from scratch. DO NO UPGRADE.

Setup a new server and rebuild the clients and then rejoin to the new domain.
If you migrate and rejoin old clients you might put a workstation manipulated by the attacker back to your new domain. The attacker might have changed some workstations in a different way with different backdoors to regain access after the cyrptolocjer clients have been kicked out.

No AV-Tool will detect all threats, especially if they are not FILE based.

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unrealone1Author Commented:
this is a stinker of a virus everyone, make sure AV is up to date and backups are robust.
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