rarstar
- Malware type
- ransomware
- Profile updated
- 2026-07-07 12:51:21
Context
This ransomware encrypts all user’s data on the PC (photos, documents, excel tables, music, videos, etc), adds its specific extension to every file, and creates the HOW_TO_DECYPHER_FILES.txt files in every folder which contains encrypted files.
Detection coverage
- 1 YARA rules
Detection rules
- MALPEDIA_Win_Rarstar_Auto (yara-rule)
Reports & references
- secureworks.com — Bronze Butler Targets Japanese Businesses (report)
- malpedia.caad.fkie.fraunhofer.de — Win.Rarstar (report)