1. Symantec/
  2. Security Response/
  3. Ransom.CryptoJoker


Risk Level 1: Very Low

January 5, 2016
August 26, 2016 11:55:33 AM
Also Known As:
Trojan.Cryptolocker.AC [Symantec]
Infection Length:
628,606 bytes
Systems Affected:
Ransom.CryptoJoker is a Trojan horse that encrypts files on the compromised computer. It then demands that the user pays a ransom in order to decrypt the files.

Note: Definitions prior to August, 2016 may detect this threat as Trojan.Cryptolocker.AC

For more information, please see the following resources:

Antivirus Protection Dates

  • Initial Rapid Release version January 5, 2016 revision 008
  • Latest Rapid Release version August 25, 2016 revision 022
  • Initial Daily Certified version January 5, 2016 revision 021
  • Latest Daily Certified version August 26, 2016 revision 001
  • Initial Weekly Certified release date January 6, 2016
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Maksim Oleynikov and Takashi Katsuki

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STAR Antimalware Protection Technologies
2016 Internet Security Threat Report, Volume 21
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