Ransomware Research

Pres Ransomware

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

Quick Facts

Ransomware Family
Pres
First Seen
April 1, 2025

How Pres Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..pres

Ransom Note and Payment Demands

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

fileinfo.txt

Ransom message:

notes/info.txt

Note locations:

RootDiscsDesktop
fileInfo.hta

Ransom message:

notes/Info.hta

Note locations:

StartUpRoaming

Technical Indicators

Associated Executable Files

The following executable files are associated with Pres ransomware:

  • file.exe

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About This Analysis

This Pres ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like Pres.

Last updated: October 30, 2025

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