Ransomware Research

Styx Ransomware

Styx is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on November 1, 2017, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Styx
First Seen
November 1, 2017

How Styx Ransomware Works

Targeted Files

Contains anti-vm, anti-emulation tricks

File Encryption Patterns

Styx modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..styx

Ransom Note and Payment Demands

After encrypting files, Styx displays ransom notes demanding payment for file recovery:

file/^[0-9]{1}_HELP_DECRYPT_FILES([0-9]{1})?\.txt$/

Ransom message:

notes/0_HELP_DECRYPT_FILES2.txt

Note locations:

UserFoldersStartUp
file/^[0-9]{1}_HELP_DECRYPT_FILES([0-9]{1})?\.html$/

Ransom message:

notes/0_HELP_DECRYPT_FILES.html

Note locations:

UserFoldersStartUp

Technical Indicators

Associated Executable Files

The following executable files are associated with Styx ransomware:

  • STX.exe
  • Ransom.exe
  • saturn_aimbot_v1.3-unpacked.exe
  • FacebookHackerTool V4.7.exe
  • Reloder%20Activator.exe
  • STX1.2.exe
  • installer.exe
  • Crack.exe
  • level7.exe
  • Application.exe

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About This Analysis

This Styx 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 Styx.

Last updated: July 30, 2025

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