General

  • Target
    GMCRY.exe
  • Size 64KB
  • Sample260809-ab4khsz1cs
  • SHA256 a7bbd5ad19a8a722a57c921dcd61de8e639e2cbc03d97134e17f4c796badcab0
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Path
  • C:\Users\Admin\Desktop\README.txt

Ransom Note
  • ============================================ YOUR FILES ARE ENCRYPTED ============================================ All your files have been encrypted with military-grade AES-256 encryption. To decrypt your files, you need the GMCRYDecryptor.exe which should be on your desktop. Run it and enter the decryption key. Contact us to get the decryption key: Telegram: @b8gmk Discord: ccvtrojan DO NOT: - Restart your computer - Delete any .gmcry files - Try to rename or move files If you do not decrypt within 24 hours, your files may be lost. ============================================

Targets

    • Target
      GMCRY.exe
    • Size 64KB
    • SHA256 a7bbd5ad19a8a722a57c921dcd61de8e639e2cbc03d97134e17f4c796badcab0
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Modifies visibility of hidden/system files in Explorer

    • Adds policy Run key to start application

    • Disables RegEdit via registry modification

    • Disables Task Manager via registry modification

    • Disables cmd.exe use via registry modification

    • Event Triggered Execution: Image File Execution Options Injection

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Creates a file in the Startup directory

      A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

    • Executes dropped EXE

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Adds Run key to start application

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Indicator Removal: Clear Persistence

      remove IFEO.

    • Executes a VBScript file via the Windows Script Host.

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v16

Tasks