Sigma Ransomware
Sigma 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
Ransom note and payment demands
After encrypting files, Sigma displays ransom notes demanding payment for file recovery:
notes/ReadMe.txt
Technical indicators
Associated executable files
The following executable files are associated with Sigma ransomware:
- Sigma.exe
- Automated Universal MultiBoot UFD Creation Tool.exe
- svchost.exe
- svchost (2).exe
- GUID.exe.bin
- GUID.exe
- Marquis Resume.doc
- Teofila Resume.doc
- Temple Resume.doc
- Regina Resume.doc
- Garey Resume.doc
- Elwyn Resume.doc
- Belinda Resume.doc
- myfile.exe
- taskwgr.exe
About this analysis
This Sigma ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like Sigma.
Last updated: December 30, 2025
Elastio detects Sigma inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify Sigma across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a scan against your recovery points to confirm.
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