Ransomware Research
777 Ransomware
777 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2015, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Legion (Seven Legion).
Quick Facts
- Ransomware Family
- 777
- First Seen
- September 1, 2015
- Known Aliases
- Legion (Seven Legion)
How 777 Ransomware Works
Targeted Files
Checks date (2016)
File Encryption Patterns
777 modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..777..legionRansom Note and Payment Demands
After encrypting files, 777 displays ransom notes demanding payment for file recovery:
read_this_file.txtRansom message:
notes/read_this_file.txt
Note locations:
DesktopRecovery and Decryption Tools
Good news! Decryption tools are available for 777 ransomware:
0
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About This Analysis
This 777 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 777.
Last updated: July 30, 2025