Ransomware Research
ReturnBack Ransomware
ReturnBack is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on July 1, 2024, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: ReturnBackCrypt.
Quick Facts
- Ransomware Family
- ReturnBack
- First Seen
- July 1, 2024
- Known Aliases
- ReturnBackCrypt
How ReturnBack Ransomware Works
Targeted Files
https://www.bleepingcomputer.com/forums/t/798733/returnback-ransomware-random-8-9-chars-lgikf865-7rd0iooq9-support-topic/?p=5663350
File Encryption Patterns
ReturnBack modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
./\.[A-Za-z0-9]{8,10}$/Ransom Note and Payment Demands
After encrypting files, ReturnBack displays ransom notes demanding payment for file recovery:
README.txtRansom message:
notes/README.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with ReturnBack ransomware:
Crypt.exe
Elastio Can Help You
Don't let ReturnBack ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This ReturnBack 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 ReturnBack.
Last updated: July 30, 2025