Combo13 Ransomware
Combo13 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2021, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Combo13 Wiper.
Quick facts
How Combo13 ransomware works
File encryption patterns
Combo13 modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, Combo13 displays ransom notes demanding payment for file recovery:
notes/FILES ENCRYPTED.TXT
Technical indicators
Associated executable files
The following executable files are associated with Combo13 ransomware:
- IS_room_start.exe
About this analysis
This Combo13 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 Combo13.
Last updated: December 30, 2025
Elastio detects Combo13 inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify Combo13 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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