Ransomware Research
GrodexCrypt Ransomware
GrodexCrypt is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- GrodexCrypt
- First Seen
- May 1, 2017
How GrodexCrypt Ransomware Works
Targeted Files
Transforms folders to files. D2 folder -> Lock.D2 file (Actually deletes folders on the Desktop, encrypts zero-lenght files)
File Encryption Patterns
GrodexCrypt modifies encrypted files using specific patterns to mark them as encrypted:
Prefixes added to encrypted files:
LockRansom Note and Payment Demands
After encrypting files, GrodexCrypt 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 GrodexCrypt ransomware:
windir.exe
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About This Analysis
This GrodexCrypt 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 GrodexCrypt.
Last updated: July 30, 2025