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Ransomware Research
CryptoMix Ransomware
CryptoMix is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CryptoMix
- First Seen
- April 1, 2016
How CryptoMix Ransomware Works
Targeted Files
https://www.hybrid-analysis.com/sample/142596b9598a76768e497ed807a0e0ac4455048175b313d0f5c9480408943238?environmentId=100 Full extension -> .email[supls@post.com]_id[38f1c63f241f].rdmk
File Encryption Patterns
CryptoMix modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..code
..lesli
..rdmk
..CK
..ZERO
..DG
..MOLE
..MOLE00
..MOLE01
..MOLE02
..MOLE03
..MOLE66
..CNC
Ransom Note and Payment Demands
After encrypting files, CryptoMix displays ransom notes demanding payment for file recovery:
_HELP_INSTRUCTIONS_.TXT
Ransom message:
notes/_HELP_INSTRUCTIONS_.TXT
Note locations:
EveryFolder
INSTRUCTION RESTORE FILE.TXT
Ransom message:
notes/INSTRUCTION RESTORE FILE.TXT
Note locations:
EveryFolder
INSTRUCTION_FOR_HELPING_FILE_RECOVERY.TXT
Ransom message:
notes/INSTRUCTION RESTORE FILE.TXT
Note locations:
EveryFolder
_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 ransomware:
CTARX.exe
AdobeFlashPlayer_5bfd178c5dfcb0db.exe
adobeflashplayer_d460ffbf1c9b74e8.exe
AdobeFlashPlayer_58fc97331c9b74ea.exe
AdobeFlashPlayer_6e166b785dfcb0db.exe
HydraCrypt
myfile.exe
Backup Instruction.exe
353E.tmp
Microsoft Decode Ransomware
radEF352.tmp.exe
MS SecurityFiles.
Spy Security SoftWare_5dfcb0db_9dd17731.exe
Security SoftWare Shield
Microsoft Decryptor Ransomware.exe
build_2017-07-26_18-48.exe
BC1CFBB99D.exe
dumpedzero
Labs.exe
BC1C9B74EA.exe
RacePostings
MS SecurityFiles.exe
a.exe
pluginoffice.exe
mole.exe
Elastio Can Help You
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About This Analysis
This CryptoMix 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.
Last updated: July 30, 2025