Ransomware Research
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
- Ransomware Family
- Combo13
- First Seen
- April 1, 2021
- Known Aliases
- Combo13 Wiper
How Combo13 Ransomware Works
Targeted Files
in some cases doesn't crypt files.
File Encryption Patterns
Combo13 modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..combo13Ransom Note and Payment Demands
After encrypting files, Combo13 displays ransom notes demanding payment for file recovery:
FILES ENCRYPTED.TXTRansom message:
notes/FILES ENCRYPTED.TXT
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with Combo13 ransomware:
IS_room_start.exe
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About This Analysis
This Combo13 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 Combo13.
Last updated: July 30, 2025