Ransomware Research

Crysis XTBL Ransomware

Crysis XTBL 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
Crysis XTBL
First Seen
June 1, 2016

How Crysis XTBL Ransomware Works

Targeted Files

Full extension -> .centurion_legion@aol.com.xtbl

File Encryption Patterns

Crysis XTBL modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..xtbl

Ransom Note and Payment Demands

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

fileHow to decrypt your files.txt
fileDecryption instructions.txt

Ransom message:

notes/Decryption instructions.txt

Note locations:

DesktopStartUp
screenshot

Ransom message:

notes/How-to-decrypt-your-files.jpg

Note locations:

Desktop
screenshot

Ransom message:

notes/Decryption instructions.jpg

Note locations:

Desktop

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About This Analysis

This Crysis XTBL 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 Crysis XTBL.

Last updated: July 30, 2025

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What is Crysis XTBL Ransomware? | Elastio