CobraLocker Ransomware
CobraLocker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2020, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Cobra, CobraLocker NextGen, Cobra_Locker2.0, Cobra_Locker3.0, Cobra_Locker4.0, CobraLocker CryptoToys.
Quick facts
How CobraLocker ransomware works
File encryption patterns
CobraLocker modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, CobraLocker displays ransom notes demanding payment for file recovery:
notes/LegionReadMe.txt
notes/Readme.txt
notes/index.html
notes/note.txt
Technical indicators
Associated executable files
The following executable files are associated with CobraLocker ransomware:
- Ransomware.exe
- IT.exe
- it.exe
- DaVinci.exe
- CoronaDecrypt0r.exe
- CoronaCrypt0r.exe
- BlackMamba2.exe
- BlackMamba2.0.exe
- ransomware.exe
- ransomware.bin
- AmongUs.exe
- AmongUs.bin
- Niros.exe
- LegionLocker3.0.exe
- WannaMad.exe
- LegionLocker3.0
About this analysis
This CobraLocker 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 CobraLocker.
Last updated: December 30, 2025
Elastio detects CobraLocker inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify CobraLocker 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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