Resubmissions

15/01/2025, 18:16

250115-wwmy6azrbx

15/01/2025, 17:10

250115-vpr4vszrep10

General

  • Target
    Bon.zip
  • Size 49.8MB
  • Sample250115-vpr4vszrep
  • SHA256 755bd7f1fc6e93c3a69a1125dd74735895bdbac9b7cabad0506195a066bdde42
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Targets

    • Target
      BonziBuddy432.exe
    • Size 49.9MB
    • SHA256 f1e859d99072e35f20e172d8458e3ea1baf8ba86c8c9e311a0debcd2acd5d0fc
    • MD5 SHA1 SHA512 SSDEEP
    • Modifies WinLogon for persistence

    • Modifies visibility of file extensions in Explorer

    • Boot or Logon Autostart Execution: Active Setup

      Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Modifies RDP port number used by Windows

    • Sets service image path in registry

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Credentials from Password Stores: Windows Credential Manager

      Suspicious access to Credentials History.

    • Drops startup file

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • Executes dropped EXE

    • Impair Defenses: Safe Mode Boot

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • System Binary Proxy Execution: Rundll32

      Abuse Rundll32 to proxy execution of malicious code.

    • 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.

    • Drops desktop.ini file(s)

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

    • Boot or Logon Autostart Execution: Authentication Package

      Suspicious Windows Authentication Registry Modification.

    • Detected potential entity reuse from brand MICROSOFT.

    • Drops file in System32 directory

    • Sets desktop wallpaper using registry

MITRE ATT&CK Enterprise v15

Tasks