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:

file/^[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
file/^[a-f0-9]{16}___READ_THIS___[a-f0-9]{16}\.txt$/

Ransom message:

notes/9ad7001da1cd141b___READ_THIS___9ad7001da1cd141b.txt

Note locations:

EveryFolder
file/^[a-f0-9]{4,8}___READ_THIS___[a-f0-9]{4,8}\.txt$/

Ransom message:

notes/0fa2a178___READ_THIS___0fa2a178.txt

Note locations:

EveryFolder
screenshot

Ransom message:

notes/GENP_R_E_A_D___T_H_I_S_GENP.jpg

Note locations:

Desktop
screenshot

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

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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

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