Ransomware Research
CryptFuck Ransomware
CryptFuck is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CryptFuck
- First Seen
- August 1, 2016
How CryptFuck Ransomware Works
Targeted Files
NOSAMPLE
File Encryption Patterns
CryptFuck modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..URfuckedRansom Note and Payment Demands
After encrypting files, CryptFuck displays ransom notes demanding payment for file recovery:
README_CRYPTFUCK.txtRansom message:
notes/README_CRYPTFUCK.txt
Elastio Can Help You
Don't let CryptFuck ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This CryptFuck ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like CryptFuck.
Last updated: July 30, 2025