Ransomware Research

Army Signal Ransomware

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

Quick Facts

Ransomware Family
Army Signal
First Seen
May 1, 2017

How Army Signal Ransomware Works

Targeted Files

TTS.vbs on the Desktop

File Encryption Patterns

Army Signal modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..SIGSCH

Ransom Note and Payment Demands

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

fileREADME_SIGSCH.txt

Ransom message:

notes/README_SIGSCH.txt

Note locations:

UserFolders

Technical Indicators

Associated Executable Files

The following executable files are associated with Army Signal ransomware:

  • hidden-tear.exe

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About This Analysis

This Army Signal 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 Army Signal.

Last updated: July 30, 2025