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Ransomware Research
CryptoMix-Arena Ransomware
CryptoMix-Arena is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Arena.
Quick Facts
- Ransomware Family
- CryptoMix-Arena
- First Seen
- August 1, 2017
- Known Aliases
- Arena
How CryptoMix-Arena Ransomware Works
Targeted Files
Encrypts filenames -> 85044AD80D5C6CBE9BFE3C480DD950EE.arena
File Encryption Patterns
CryptoMix-Arena modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..arena
Ransom Note and Payment Demands
After encrypting files, CryptoMix-Arena displays ransom notes demanding payment for file recovery:
_HELP_INSTRUCTION.TXT
Ransom message:
notes/_HELP_INSTRUCTION.TXT
Note locations:
EveryFolder
Technical Indicators
Associated Executable Files
The following executable files are associated with CryptoMix-Arena ransomware:
BC5DFCB0DB.exe
BC0838B179.exe
myfile.exe
bars2.exe
bars.exe
bars.exe.bin
Elastio Can Help You
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About This Analysis
This CryptoMix-Arena 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 CryptoMix-Arena.
Last updated: July 30, 2025