Ransomware Research
CovidLocker Ransomware
CovidLocker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2021, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CovidLocker
- First Seen
- June 1, 2021
How CovidLocker Ransomware Works
File Encryption Patterns
CovidLocker modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..covid..inprocessRansom Note and Payment Demands
After encrypting files, CovidLocker displays ransom notes demanding payment for file recovery:
How_To_Recover.mhtRansom message:
notes/How_To_Recover.mht
Note locations:
RootDiscsDesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with CovidLocker ransomware:
locker.exe
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About This Analysis
This CovidLocker 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 CovidLocker.
Last updated: July 30, 2025