Ransomware Research

Apos Ransomware

Apos is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2025, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
Apos
First Seen
February 1, 2025

How Apos ransomware works

File modification behavior

Apos updates file modification timestamps after encryption.

File encryption patterns

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

Extensions added after encryption
  • .apos

Ransom note and payment demands

After encrypting files, Apos displays ransom notes demanding payment for file recovery:

fileREAD_ME_3576629047-528501871.txt
notes/READ_ME_3576629047-528501871.txt

Location: EveryFolder

screenshot
notes/CachedImage_1152_864_POS4.jpg

Location: Desktop

Technical indicators

Associated executable files

The following executable files are associated with Apos ransomware:

  • windows_encryptor_3576629047_self_contained_x86.exe

About this analysis

This Apos 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 Apos.

Last updated: May 21, 2026

Detection coverage

Elastio detects Apos inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify Apos 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.