Ransomware Research
HydraCrypt Ransomware
HydraCrypt is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- HydraCrypt
- First Seen
- February 1, 2016
How HydraCrypt Ransomware Works
Targeted Files
NOSAMPLE Chrysanthemum.jpg -> Chrysanthemum.jpg.hydracrypt_ID_d2vak123
File Encryption Patterns
HydraCrypt modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
./\.hydracrypt_ID_[a-z0-9]{8}\b/Ransom Note and Payment Demands
After encrypting files, HydraCrypt displays ransom notes demanding payment for file recovery:
^README_DECRYPT_HYRDA_ID_[a-z0-9]{8}\.txt\bRansom message:
notes/README_DECRYPT_HYRDA_ID_d2vak123.txt
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About This Analysis
This HydraCrypt 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 HydraCrypt.
Last updated: July 30, 2025