Ransomware Research
BIG HEAD Ransomware
BIG HEAD is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2023, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- BIG HEAD
- First Seen
- May 1, 2023
How BIG HEAD Ransomware Works
Targeted Files
Encodes filenames with base64 Variable marker at the end of the files No suffixes
Ransom Note and Payment Demands
After encrypting files, BIG HEAD displays ransom notes demanding payment for file recovery:
/^README_[0-9]{4,8}\.txt$/Ransom message:
notes/README_8887621.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with BIG HEAD ransomware:
1.exe
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About This Analysis
This BIG HEAD 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 BIG HEAD.
Last updated: July 30, 2025