Ransomware Research

Rush Ransomware

Rush is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2016, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
Rush
First Seen
June 1, 2016

How Rush ransomware works

File encryption patterns

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

Extensions added after encryption
.crashed.c_locked

Ransom note and payment demands

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

fileDECRYPT_FILES.HTML
notes/DECRYPT_FILES.HTML
Location: EveryFolder
fileDECRYPT_YOUR_FILES.HTML
notes/DECRYPT_YOUR_FILES.HTML
Location: EveryFolder

About this analysis

This Rush 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 Rush.

Last updated: December 30, 2025

Detection coverage

Elastio detects Rush inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify Rush 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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What is Rush Ransomware? | Elastio