General

  • Target

    5cb96def1bfb4ccc9c85a5f4e02bc7a04a4738ca6c881e1966f2f44c07596ed0.exe

  • Size

    352KB

  • Sample

    240517-ct8nasdc49

  • MD5

    87e21d5173a8bc915d8747ae208b7024

  • SHA1

    f9a14ab85de9eeba9b7ea332890ff53ed4bec039

  • SHA256

    5cb96def1bfb4ccc9c85a5f4e02bc7a04a4738ca6c881e1966f2f44c07596ed0

  • SHA512

    cca70a522671560c2d7fec9fd70f4d3f4304e79ace5cb2bcea796a7820c486943870cf935e0f9e4f75a5024dfce59d18e93ded2a515e2cba1a89eaa7fade5dc5

  • SSDEEP

    6144:Dc8L+LLwqOJFV4Re+AuqwBkVyv/+Z88f42nxo3fJVZAP51Ibkf:DF+L0qOJsR/Auh2Ve8f42nx+J+51Rf

Malware Config

Extracted

Family

gcleaner

C2

185.172.128.90

5.42.64.56

5.42.65.64

Targets

    • Target

      5cb96def1bfb4ccc9c85a5f4e02bc7a04a4738ca6c881e1966f2f44c07596ed0.exe

    • Size

      352KB

    • MD5

      87e21d5173a8bc915d8747ae208b7024

    • SHA1

      f9a14ab85de9eeba9b7ea332890ff53ed4bec039

    • SHA256

      5cb96def1bfb4ccc9c85a5f4e02bc7a04a4738ca6c881e1966f2f44c07596ed0

    • SHA512

      cca70a522671560c2d7fec9fd70f4d3f4304e79ace5cb2bcea796a7820c486943870cf935e0f9e4f75a5024dfce59d18e93ded2a515e2cba1a89eaa7fade5dc5

    • SSDEEP

      6144:Dc8L+LLwqOJFV4Re+AuqwBkVyv/+Z88f42nxo3fJVZAP51Ibkf:DF+L0qOJsR/Auh2Ve8f42nx+J+51Rf

    • 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