> Viruses & Risks > Ransom.Cryptolocker.D


Risk Level 1: Very Low

January 24, 2014
August 30, 2016 11:41:33 AM
Also Known As:
Trojan.Cryptolocker.D [Symantec]
Infection Length:
Systems Affected:
Ransom.Cryptolocker.D is a Trojan horse that encrypts files on the compromised computer and then prompts the user to purchase a key in order to decrypt them.

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

For more information, please see the following resources:
Cryptolocker Q&A: Menace of the Year
Cryptolocker: A Thriving Menace

Antivirus Protection Dates

  • Initial Rapid Release version January 24, 2014 revision 002
  • Latest Rapid Release version October 23, 2016 revision 004
  • Initial Daily Certified version January 28, 2014 revision 002
  • Latest Daily Certified version October 23, 2016 revision 018
  • Initial Weekly Certified release date January 29, 2014
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Low
  • Number of Infections: 0 - 49
  • Number of Sites: 0 - 2
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Easy


  • Damage Level: Medium
  • Payload: Demands a ransom to decrypt files on the compromised computer.
  • Modifies Files: Encrypts files on the compromised computer.


  • Distribution Level: Low
Writeup By: Takayoshi Nakayama

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