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Cryptolocker

Classification

Category:

Malware

Type:

Trojan

Aliases:

  • Cryptolocker
  • Trojan.cryptolocker
  • Trojan.downloader.cryptolocker

Summary

Cryptolocker encrypts files on the compromised computer and demands a ransom to provide the decryption key needed to decrypt the files.

Removal

Technical Details

Cryptolocker is ransomware that is spread by both malicious file attachments to email messages and via the Gameover Zeus botnet. When Cryptolocker is run, it encrypts files on the compromised machine and displays a message informing the user that a decryption key must be purchased in order to recover access to the files held at ransom.

For more information, see:

Further analysis

If you believe you have encountered an undetected Cryptolocker sample, please send it to us for analysis via our Submit A Sample (SAS) page.

CTB-Locker

Update: 10 February, 2015: Details of the CTB-Locker ransomware which were originally posted in this description have now been moved to a separate description, Trojan:W32/CTB-Locker, to minimize confusion between these two ransomware families.

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