Ransomware Research

GandCrab Ransomware

GandCrab is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2018, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: GDCB.

Quick Facts

Ransomware Family
GandCrab
First Seen
January 1, 2018
Known Aliases
GDCB

How GandCrab Ransomware Works

Targeted Files

Requires C&C for key exchange (can be launched with FakeNetNG)

File Encryption Patterns

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

File extensions added after encryption:

..GDCB

Ransom Note and Payment Demands

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

fileGDCB-DECRYPT.txt

Ransom message:

notes/GDCB-DECRYPT.txt

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with GandCrab ransomware:

  • dfpund.exe
  • akpjpi.exe
  • fiaigk.exe
  • 4.bin
  • myfile.exe
  • 4.exe
  • GandCrab.exe
  • malware.exe
  • culeio.exe
  • grandcrab.exe
  • fokgto.exe
  • 3e2e881ec.exe
  • GandCrab (2).exe
  • Font_update.exe
  • egahfghjfghj.exe
  • stub.exe
  • Ransom.GandCrab
  • base64.bin
  • 2018-02-23.15:00:01
  • nslookup.exe

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About This Analysis

This GandCrab 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 GandCrab.

Last updated: July 30, 2025

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