Ransomware Research

Rust Peter's Ransomware

Rust Peter's is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2023, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
Rust Peter's
First Seen
January 1, 2023

How Rust Peter's ransomware works

File encryption patterns

Rust Peter's modifies encrypted files using specific patterns to mark them as encrypted:

Extensions added after encryption
.peter

Ransom note and payment demands

After encrypting files, Rust Peter's displays ransom notes demanding payment for file recovery:

fileencrypt_date.txt
Location: UserProfile

Technical indicators

Associated executable files

The following executable files are associated with Rust Peter's ransomware:

About this analysis

This Rust Peter's 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 Rust Peter's.

Last updated: December 30, 2025

Detection coverage

Elastio detects Rust Peter's inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify Rust Peter's 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.

See How the Hunt Engine WorksRequest a Demo

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