General

  • Target
    5cb96def1bfb4ccc9c85a5f4e02bc7a04a4738ca6c881e1966f2f44c07596ed0.exe
  • Size 352KB
  • Sample240517-ct8nasdc49
  • SHA256 5cb96def1bfb4ccc9c85a5f4e02bc7a04a4738ca6c881e1966f2f44c07596ed0
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • gcleaner

C2
  • 185.172.128.90

  • 5.42.64.56

  • 5.42.65.64

Targets

    • Target
      5cb96def1bfb4ccc9c85a5f4e02bc7a04a4738ca6c881e1966f2f44c07596ed0.exe
    • Size 352KB
    • SHA256 5cb96def1bfb4ccc9c85a5f4e02bc7a04a4738ca6c881e1966f2f44c07596ed0
    • MD5 SHA1 SHA512 SSDEEP
    • GCleaner

      GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.

    • Glupteba

      Glupteba is a modular loader written in Golang with various components.

    • Glupteba payload

    • UAC bypass

    • Windows security bypass

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Downloads MZ/PE file

    • Modifies Windows Firewall

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Windows security modification

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Legitimate hosting services abused for malware hosting/C2

    • Manipulates WinMonFS driver.

      Roottkits write to WinMonFS to hide directories/files from being detected.

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks