General

  • Target

    esigned-document_eml.bat

  • Size

    2KB

  • Sample

    250102-q9acbsxkdq

  • MD5

    a0d37228b4ad0ebea6537b99cbcb7ff0

  • SHA1

    cec0438ed7acde6a177bc220df2d4fa94352e539

  • SHA256

    e85d8640a62e0d223fe9892384eecb8bb9e67d4bf2fc020881058506b33bec30

  • SHA512

    a4fda2b2adbe591bbfb44fb0949becf75349f5255f197008727486f15e0cc18fcdbce6c1d3ba16e65a5e32a5d8ffc857cfa75402975eafedf4c11524d4f1f9ea

Malware Config

Targets

    • Target

      esigned-document_eml.bat

    • Size

      2KB

    • MD5

      a0d37228b4ad0ebea6537b99cbcb7ff0

    • SHA1

      cec0438ed7acde6a177bc220df2d4fa94352e539

    • SHA256

      e85d8640a62e0d223fe9892384eecb8bb9e67d4bf2fc020881058506b33bec30

    • SHA512

      a4fda2b2adbe591bbfb44fb0949becf75349f5255f197008727486f15e0cc18fcdbce6c1d3ba16e65a5e32a5d8ffc857cfa75402975eafedf4c11524d4f1f9ea

    • STRRAT

      STRRAT is a remote access tool than can steal credentials and log keystrokes.

    • Strrat family

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Powershell Invoke Web Request.

    • Downloads MZ/PE file

    • 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

    • Loads dropped DLL

    • Adds Run key to start application

    • Enumerates connected drives

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

    • Installs/modifies Browser Helper Object

      BHOs are DLL modules which act as plugins for Internet Explorer.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks