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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:
..BLOCKED
Ransom Note and Payment Demands
After encrypting files, CrystalCrypt displays ransom notes demanding payment for file recovery:
Ransom message:
notes/note.txt
Note locations:
OnceOnCompletion
CrystalCrypt_Recover_Instructions.txt
Ransom message:
notes/CrystalCrypt_Recover_Instructions.txt
Note locations:
Desktop
Ransom message:
notes/CrystalCrypt_Recover_Instructions.png
Note locations:
Desktop
Elastio Can Help You
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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