Ransomware Research
Blood Ransomware
Blood is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Blood
- First Seen
- December 1, 2017
How Blood Ransomware Works
Targeted Files
Requires C&C to send data Encrypts only test folder on the Desktop
File Encryption Patterns
Blood modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..TEARSRansom Note and Payment Demands
After encrypting files, Blood displays ransom notes demanding payment for file recovery:
READ_ME.txtRansom message:
notes/READ_ME.txt
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with Blood ransomware:
shadow-blood.exe
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About This Analysis
This Blood 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 Blood.
Last updated: July 30, 2025