Ransomware Research
SYSDF Ransomware
SYSDF is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2024, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- SYSDF
- First Seen
- February 1, 2024
How SYSDF Ransomware Works
Targeted Files
Full extension -> .id-C63F241F.[Dec24hepl@aol.com].SYSDF
File Encryption Patterns
SYSDF modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..SYSDFRansom Note and Payment Demands
After encrypting files, SYSDF displays ransom notes demanding payment for file recovery:
README!.txtRansom message:
notes/README!.txt
Note locations:
RootDiscsDesktopInfo.htaRansom message:
notes/Info.hta
Note locations:
StartUpTechnical Indicators
Associated Executable Files
The following executable files are associated with SYSDF ransomware:
SYSDEFENDER.EXE
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About This Analysis
This SYSDF 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 SYSDF.
Last updated: July 30, 2025