Ransomware Research

Pendor Ransomware

Pendor is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2017, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Pendor
First Seen
September 1, 2017

How Pendor Ransomware Works

Targeted Files

https://tria.ge/230417-xe8d7shd3v/behavioral1

File Encryption Patterns

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

File extensions added after encryption:

..pnr

Ransom Note and Payment Demands

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

fileREAD_THIS_FILE_1.TXT

Ransom message:

notes/READ_THIS_FILE_1.TXT

Note locations:

Desktop
fileREAD_THIS_FILE_2.TXT

Ransom message:

notes/READ_THIS_FILE_1.TXT

Note locations:

Desktop

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About This Analysis

This Pendor 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 Pendor.

Last updated: July 30, 2025

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