- Home
- Detectable Ransomware
- Hermes837
Ransomware Research
Hermes837 Ransomware
Hermes837 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Haka, Cobain, Jenkins, Voyager, Hendrix, Dragon.
Quick Facts
- Ransomware Family
- Hermes837
- First Seen
- September 1, 2019
- Known Aliases
- HakaCobainJenkinsVoyagerHendrixDragon
How Hermes837 Ransomware Works
Targeted Files
Encrypts different blocks 0x20000, 0x40000 bytes
File Encryption Patterns
Hermes837 modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..hermes837
..haka
..cobain
..jenkins
..voyager
..hendrix
..dragon
Ransom Note and Payment Demands
After encrypting files, Hermes837 displays ransom notes demanding payment for file recovery:
!!!READ_ME_FIRST!!!.txt
Ransom message:
notes/!!!READ_ME_FIRST!!!.txt
Note locations:
EveryFolder
!!!READ_ME!!!.txt
Ransom message:
notes/!!!READ_ME!!!.txt
Note locations:
EveryFolder
!READ_ME.txt
Ransom message:
notes/!READ_ME.txt
Note locations:
EveryFolder
Technical Indicators
Associated Executable Files
The following executable files are associated with Hermes837 ransomware:
jenkins_en.exe
voyager_en.exe
Elastio Can Help You
Don't let Hermes837 ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This Hermes837 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 Hermes837.
Last updated: July 30, 2025