General

  • Target
    https://vx-underground.org/?value=android
  • Sample260319-b3ek5sgv3j

Malware Config

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    https://www.win-rar.com/fileadmin/winrar-versions/downloader/versions.xml

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    https://www.win-rar.com/fileadmin/winrar-versions/winrar/winrar-x64-720.exe

Targets

    • BlackGuard

      Infostealer first seen in Late 2021.

    • Blackguard family

    • Renames multiple (86) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Downloads MZ/PE file

    • Modifies Windows Firewall

    • 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

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Checks installed software on the system

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

    • Enumerates connected drives

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v16

Tasks