Ransomware Research

Deos Ransomware

Deos 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
Deos
First Seen
May 1, 2017

How Deos ransomware works

File modification behavior

Deos updates file modification timestamps after encryption.

File encryption patterns

Deos modifies encrypted files using specific patterns to mark them as encrypted:

Extensions added after encryption
  • .locked

Ransom note and payment demands

After encrypting files, Deos 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 Deos ransomware:

  • Locker.exe

About this analysis

This Deos 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 Deos.

Last updated: March 14, 2023

Detection coverage

Elastio detects Deos inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify Deos 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.