fileREADME_FOR_DECRYPT.txt
notes/README_FOR_DECRYPT.txt
Location: EveryFolder
Ransomware Research
Rustylocker Ransomware
Rustylocker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2025, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Rusty Lockbox.
Quick facts
- Ransomware Family
- Rustylocker
- First Seen
- December 1, 2025
- Known Aliases
- Rusty Lockbox
How Rustylocker ransomware works
File modification behavior
Rustylocker updates file modification timestamps after encryption.
File encryption patterns
Rustylocker modifies encrypted files using specific patterns to mark them as encrypted:
Extensions added after encryption
- .lockbox
Ransom note and payment demands
After encrypting files, Rustylocker displays ransom notes demanding payment for file recovery:
fileREADME.txt
notes/README.txt
Location: RootDiscs
fileREADME.txt
notes/READMEv2.txt
Location: RootDiscs
fileREADME.txt
notes/READMEv3.txt
Location: RootDiscs
Technical indicators
Associated executable files
The following executable files are associated with Rustylocker ransomware:
- enc.exe
- tut19o.exe
About this analysis
This Rustylocker 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 Rustylocker.
Detection coverage
Elastio detects Rustylocker inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify Rustylocker 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.