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
File Encryption Patterns
Army Signal modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..SIGSCHRansom Note and Payment Demands
After encrypting files, Army Signal displays ransom notes demanding payment for file recovery:
README_SIGSCH.txtRansom message:
notes/README_SIGSCH.txt
Note locations:
UserFoldersTechnical 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: October 30, 2025
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