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Ransomware Research
FuxSocy Ransomware
FuxSocy is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2019, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- FuxSocy
- First Seen
- October 1, 2019
How FuxSocy Ransomware Works
Targeted Files
ransom note name examples -> KG4YGH_R_E_A_D___T_H_I_S_KG4YGH.txt;IUU2RN_R_E_A_D___T_H_I_S_IUU2RN.txt;6UIPR_R_E_A_D___T_H_I_S_6UIPR.txt Start encryption form 0x708 offset Renames files {10 random chars}.{4 random chars}
File Encryption Patterns
FuxSocy modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
./\.[a-f0-9]{4}\b/
./\.[a-z0-9]{3}_[a-f0-9]{16}\b/
Ransom Note and Payment Demands
After encrypting files, FuxSocy displays ransom notes demanding payment for file recovery:
/^[A-Z0-9]{4,8}_R_E_A_D___T_H_I_S_[A-Z0-9]{4,8}\.txt$/
Ransom message:
notes/IUU2RN_R_E_A_D___T_H_I_S_IUU2RN.txt
Note locations:
EveryFolder
/^[a-f0-9]{16}___READ_THIS___[a-f0-9]{16}\.txt$/
Ransom message:
notes/9ad7001da1cd141b___READ_THIS___9ad7001da1cd141b.txt
Note locations:
EveryFolder
/^[a-f0-9]{4,8}___READ_THIS___[a-f0-9]{4,8}\.txt$/
Ransom message:
notes/0fa2a178___READ_THIS___0fa2a178.txt
Note locations:
EveryFolder
Ransom message:
notes/GENP_R_E_A_D___T_H_I_S_GENP.jpg
Note locations:
Desktop
Ransom message:
notes/9ad7001da1cd141b___READ_THIS___9ad7001da1cd141b.jpg
Note locations:
Desktop
Technical Indicators
Associated Executable Files
The following executable files are associated with FuxSocy ransomware:
MuiUnattend.exe
devicepairingwizard.exe
auditpol.exe
eventcreate.exe
icardagt.exe
edpnotify.exe
RCX1D93.tmp
HdwWiz.EXE
Elastio Can Help You
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About This Analysis
This FuxSocy 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 FuxSocy.
Last updated: July 30, 2025