Ransomware Research
Crypto-Blocker Ransomware
Crypto-Blocker 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
- Crypto-Blocker
- First Seen
- May 1, 2017
How Crypto-Blocker Ransomware Works
Targeted Files
Current sample encrypt %TEMP% folder only
File Encryption Patterns
Crypto-Blocker modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..corruptedRansom Note and Payment Demands
After encrypting files, Crypto-Blocker displays ransom notes demanding payment for file recovery:
Ransom message:
notes/note.txt
Note locations:
OnceOnCompletionTechnical Indicators
Associated Executable Files
The following executable files are associated with Crypto-Blocker ransomware:
Crypto-Blocker.exe
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About This Analysis
This Crypto-Blocker 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 Crypto-Blocker.
Last updated: July 30, 2025