Ransomware Research
S0S Ransomware
S0S is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2026, this ransomware has been actively targeting systems worldwide.
Quick facts
- Ransomware Family
- S0S
- First Seen
- February 1, 2026
How S0S ransomware works
File modification behavior
S0S updates file modification timestamps after encryption.
File encryption patterns
S0S modifies encrypted files using specific patterns to mark them as encrypted:
Extensions added after encryption
- .S0S
Technical indicators
Associated executable files
The following executable files are associated with S0S ransomware:
- svchost.exe
- HelloThere.exe
About this analysis
This S0S 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 S0S.
Detection coverage
Elastio detects S0S inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify S0S across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a hunt against your recovery points to confirm.