Ransomware Research
Bug Ransomware
Bug is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2020, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Bugo.
Quick Facts
- Ransomware Family
- Bug
- First Seen
- April 1, 2020
- Known Aliases
- Bugo
How Bug Ransomware Works
Targeted Files
template for encrypted files -> .[<email_ransom>].bug Encrypts only UserFolders
File Encryption Patterns
Bug modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..bugRansom Note and Payment Demands
After encrypting files, Bug displays ransom notes demanding payment for file recovery:
Read_Bug.htmlRansom message:
notes/Read_Bug.html
Note locations:
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About This Analysis
This Bug 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 Bug.
Last updated: July 30, 2025