AtomSilo Ransomware
AtomSilo is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2021, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: AtomSlio.
Quick facts
How AtomSilo ransomware works
File encryption patterns
AtomSilo modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, AtomSilo displays ransom notes demanding payment for file recovery:
notes/README-FILE-DESKTOP-NVLERB1-1661424673.hta
Technical indicators
Associated executable files
The following executable files are associated with AtomSilo ransomware:
- ATOMSILO_2.exe
- update.exe
- pri.exe_
About this analysis
This AtomSilo 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 AtomSilo.
Last updated: December 30, 2025
Elastio detects AtomSilo inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify AtomSilo 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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