Ransomware Research
Sun Ransomware
Sun is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: SunCrypt.
Quick Facts
- Ransomware Family
- Sun
- First Seen
- October 1, 2019
- Known Aliases
- SunCrypt
How Sun Ransomware Works
Targeted Files
https://www.bleepingcomputer.com/forums/t/706131/sun-suncrypt-ransomware-sun-decrypt-informationhtml/
File Encryption Patterns
Sun modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..sunRansom Note and Payment Demands
After encrypting files, Sun displays ransom notes demanding payment for file recovery:
DECRYPT_INFORMATION.htmlRansom message:
notes/DECRYPT_INFORMATION.html
Technical Indicators
Associated Executable Files
The following executable files are associated with Sun ransomware:
SYSINFO.EXE
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About This Analysis
This Sun 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 Sun.
Last updated: July 30, 2025