Alco Ransomware
Alco is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2018, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Maoloa-Alco, X_Mister, 4444, 666, 865.
Quick facts
How Alco ransomware works
File encryption patterns
Alco modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, Alco displays ransom notes demanding payment for file recovery:
notes/HOW TO BACK YOUR FILES.txt
notes/HOW_TO_BACK_FILES.txt
Technical indicators
Associated executable files
The following executable files are associated with Alco ransomware:
- GlobeImposter.exe
- test_v.doc
- svhost.exe
- Tiger4444.exe
- Persephone666.exe
- Rabbit4444.exe
- Hades666.exe
- Athena865.exe
- WINLOGON_PROTECTED.EXE
- winlogon.exe
- Hakbdyww7.exe
- cia.exe
- bfsv.exe
- Data Recovery.bin
- Apollon865.exe
- winlogon_protected.exe
About this analysis
This Alco 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 Alco.
Last updated: December 30, 2025
Elastio detects Alco inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify Alco across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a scan against your recovery points to confirm.
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