General

  • Target
    https://updatecdn.meeting.qq.com/cos/20260522192917/TMRInstaller_1410000391_3.43.430.511.x64.exe
  • Sample260825-lkfetszcrc

Malware Config

Targets

    • Target
      https://updatecdn.meeting.qq.com/cos/20260522192917/TMRInstaller_1410000391_3.43.430.511.x64.exe
    • Modifies firewall policy service

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Downloads MZ/PE file

    • Disables service(s)

    • 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

    • Checks installed software on the system

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

    • Power Settings

      powercfg controls all configurable power system settings on a Windows system and can be abused to prevent an infected host from locking or shutting down.

    • Writes to the Master Boot Record (MBR)

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

    • Checks system information in the registry

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

MITRE ATT&CK Enterprise v16

Tasks