Ransomware Research
CryptoLuck Ransomware
CryptoLuck is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on November 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CryptoLuck
- First Seen
- November 1, 2016
How CryptoLuck Ransomware Works
Targeted Files
A lot of VM checks (in DLL)
File Encryption Patterns
CryptoLuck modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
./\.[0-9A-F]{8}_luck\b/Ransom Note and Payment Demands
After encrypting files, CryptoLuck displays ransom notes demanding payment for file recovery:
/^@WARNING_FILES_ARE_ENCRYPTED\.[0-9A-F]{8}\.txt\b/Ransom message:
notes/@WARNING_FILES_ARE_ENCRYPTED.055860F2.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with CryptoLuck ransomware:
d399d7eb0e02123a_d48.tmp
Elastio Can Help You
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About This Analysis
This CryptoLuck 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 CryptoLuck.
Last updated: July 30, 2025