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