fileRansomware Lost Files Message.txt
notes/Ransomware Lost Files Message.txt
Location: EveryFolder
Ransomware Research
Lost_Files Ransomware
Lost_Files 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.
Quick facts
- Ransomware Family
- Lost_Files
- First Seen
- September 1, 2019
How Lost_Files ransomware works
File modification behavior
Lost_Files updates file modification timestamps after encryption.
File encryption patterns
Lost_Files modifies encrypted files using specific patterns to mark them as encrypted:
Extensions added after encryption
- .Lost_Files_Encrypt
Ransom note and payment demands
After encrypting files, Lost_Files displays ransom notes demanding payment for file recovery:
message
notes/note.txt
Location: OnceOnCompletion
Technical indicators
Associated executable files
The following executable files are associated with Lost_Files ransomware:
- WSS.zip
- tmp.download
- B3B4JZUH.exe
- Lost_Files.exe
- wss.exe
- Windows Security Scanner.exe
- SecurityUpdater.exe.exe
- B1HFZL.exe
About this analysis
This Lost_Files ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like Lost_Files.
Detection coverage
Elastio detects Lost_Files inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify Lost_Files across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a hunt against your recovery points to confirm.