- Home
- Detectable Ransomware
- Amnesia
Ransomware Research
Amnesia Ransomware
Amnesia is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Amnesia
- First Seen
- May 1, 2017
How Amnesia Ransomware Works
Targeted Files
Encrypts first 1Mb
File Encryption Patterns
Amnesia modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..amnesia
..@decrypt2017
..[Help244@Ya.RU].LOCKED
..CTB-Locker
..protomolecule@gmx.us
..@decrypt_files2017
..01
..02
..[byd@india.com].SON
..onion
Ransom Note and Payment Demands
After encrypting files, Amnesia displays ransom notes demanding payment for file recovery:
HOW TO RECOVER ENCRYPTED FILES.TXT
Ransom message:
notes/HOW TO RECOVER ENCRYPTED FILES.TXT
Note locations:
EveryFolder
RECOVER-FILES.HTML
Ransom message:
notes/RECOVER-FILES.HTML
Note locations:
EveryFolder
!__П_Р_О_Ч_Т_И__CTB-Locker__ПРОЧТИ__ПРОЧТИ.TXT
Technical Indicators
Associated Executable Files
The following executable files are associated with Amnesia ransomware:
guide.exe
update.exe
Happier.exe
risk0805_d101_cr174.exe
bstarb.exe
Elastio Can Help You
Don't let Amnesia ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This Amnesia 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 Amnesia.
Last updated: July 30, 2025