Ransomware Research
GX40 Ransomware
GX40 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- GX40
- First Seen
- April 1, 2017
How GX40 Ransomware Works
File Encryption Patterns
GX40 modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..encryptedRansom Note and Payment Demands
After encrypting files, GX40 displays ransom notes demanding payment for file recovery:
Ransom message:
notes/note.txt
Note locations:
OnceOnCompletionTechnical Indicators
Associated Executable Files
The following executable files are associated with GX40 ransomware:
GX40.exeGX40 - PayPal Validator.exeGX40_RANSOMWARE_BUILDER.exeRANSOMWARE.exeGX40 RANSOMWARE BUILDER.exeGX40 - Ransomeware Builder.exeGX40_RANSOMWARE_BUILDER (1).exeb73.exeSystem.exeGoogle Chrome.exe
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About This Analysis
This GX40 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 GX40.
Last updated: July 30, 2025