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


Risk Level 1: Very Low

July 16, 2014
August 30, 2016 11:39:56 AM
Also Known As:
Trojan-Ransom.Win32.Onion [Kaspersky], Win32/Critroni.A [Microsoft], TROJ_CRYPCTB.A [Trend], Trojan.Cryptolocker.G [Symantec]
Systems Affected:
Ransom.CTBLocker is a Trojan horse that encrypts files on the compromised computer and then prompts the user to purchase a password in order to decrypt them.

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

For more information, see our blog:
The dawn of ransomwear: How ransomware could move to wearable devices

Antivirus Protection Dates

  • Initial Rapid Release version July 16, 2014 revision 006
  • Latest Rapid Release version January 15, 2018 revision 020
  • Initial Daily Certified version July 16, 2014 revision 016
  • Latest Daily Certified version January 15, 2018 revision 024
  • Initial Weekly Certified release date July 16, 2014
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Mark Anthony Balanza

Search Threats

Search by name
Example: W32.Beagle.AG@mm
STAR Antimalware Protection Technologies
2016 Internet Security Threat Report, Volume 21
  • Twitter
  • Facebook
  • LinkedIn
  • Google+
  • YouTube