Ransomware Research
CrystalCrypt Ransomware
CrystalCrypt is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CrystalCrypt
- First Seen
- May 1, 2017
How CrystalCrypt Ransomware Works
Targeted Files
Requires C&C (can be launched with FakeNetNG)
File Encryption Patterns
CrystalCrypt modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..BLOCKEDRansom Note and Payment Demands
After encrypting files, CrystalCrypt displays ransom notes demanding payment for file recovery:
Ransom message:
notes/note.txt
Note locations:
OnceOnCompletionCrystalCrypt_Recover_Instructions.txtRansom message:
notes/CrystalCrypt_Recover_Instructions.txt
Note locations:
DesktopRansom message:
notes/CrystalCrypt_Recover_Instructions.png
Note locations:
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About This Analysis
This CrystalCrypt 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 CrystalCrypt.
Last updated: July 30, 2025