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Ransomware Research
Sodinokibi Ransomware
Sodinokibi is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Sodinokibi Doxware, BlueBackground, REvil.
Quick Facts
- Ransomware Family
- Sodinokibi
- First Seen
- April 1, 2019
- Known Aliases
- Sodinokibi DoxwareBlueBackgroundREvil
How Sodinokibi Ransomware Works
Targeted Files
https://app.any.run/tasks/9a9a7109-8497-4e1e-b3d7-b9ab0871ea9e/ Encrypts first 0x100000 bytes; Ex filenames -> 2gi81a0o-readme.txt;fpa6378b9h-readme.txt;hg6u62-readme.txt
File Encryption Patterns
Sodinokibi modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
./\.[a-z0-9]{6,10}$/
Ransom Note and Payment Demands
After encrypting files, Sodinokibi displays ransom notes demanding payment for file recovery:
/^[a-z0-9]{5,10}-readme\.txt$/
Ransom message:
notes/kww38r-readme.txt
Note locations:
EveryFolder
/^[a-z0-9]{5,10}-README\.txt$/
Ransom message:
notes/rxk20-README.txt
Note locations:
EveryFolder
/^[a-z0-9]{5,10}-HOW-TO-DECRYPT\.txt$/
Ransom message:
notes/c7mjpia4-HOW-TO-DECRYPT.txt
Note locations:
EveryFolder
/^[a-z0-9]{5,10}-PLEASE-README-THIS\.txt$/
Ransom message:
notes/6l3l43wj-PLEASE-README-THIS.txt
Note locations:
EveryFolder
/^[a-f0-9]{6}\.info\.txt$/
Ransom message:
notes/e728a6.info.txt
Note locations:
EveryFolder
/^[a-z0-9]{5,10}-read-me-ATTRATTIVO\.txt$/
Ransom message:
notes/0f155qd6j-read-me-ATTRATTIVO.txt
Note locations:
EveryFolder
/^[a-z0-9]{5,10}-HELP-NEED\.txt$/
Ransom message:
notes/e9pf8q6-HELP-NEED.txt
Note locations:
EveryFolder
/^ATTENTION-[a-z0-9]{5,10}-README\.txt$/
Ransom message:
notes/ATTENTION-1n4voi498e-README.txt
Note locations:
EveryFolder
Technical Indicators
Associated Executable Files
The following executable files are associated with Sodinokibi ransomware:
9Maghszwd0GXsSso.exe
sodinokibi.exe
untitled.exe
3WaiFPGQ.exe
ransomware.exe
s.exe
linux.linux
colorui.dll
June document
Elastio Can Help You
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About This Analysis
This Sodinokibi 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 Sodinokibi.
Last updated: July 30, 2025