Analysis

  • max time kernel
    129s
  • max time network
    130s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    25/05/2024, 16:07

General

  • Target
    file.vbs
  • Size 539B
  • Sample240525-tkmsxaae22
  • SHA256 4a62f4f5444c21f4eea648f052ee094237008f2d4c0d9b01e3c3d8a0faa54e8f
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs
  • Modifies firewall policy service 2 TTPs 36 IoCs
  • Modifies security service 2 TTPs 18 IoCs
  • Manipulates Digital Signatures 1 TTPs 64 IoCs

    Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.

  • Modifies Installed Components in the registry 2 TTPs 52 IoCs
  • Registers new Print Monitor 2 TTPs 12 IoCs
  • Sets file execution options in registry 2 TTPs 42 IoCs
  • Modifies system executable filetype association 2 TTPs 45 IoCs
  • Registers COM server for autorun 1 TTPs 64 IoCs
  • Adds Run key to start application 2 TTPs 8 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 9 IoCs

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

  • Maps connected drives based on registry 3 TTPs 3 IoCs

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

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Checks processor information in registry 2 TTPs 10 IoCs

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

  • Enumerates system info in registry 2 TTPs 64 IoCs
  • Modifies Internet Explorer settings 1 TTPs 64 IoCs
  • Modifies registry class 64 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\file.vbs"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2916
    • C:\Windows\System32\reg.exe
      "C:\Windows\System32\reg.exe" delete HKLM /f
      2⤵
      • Adds autorun key to be loaded by Explorer.exe on startup
      • Modifies firewall policy service
      • Modifies security service
      • Manipulates Digital Signatures
      • Modifies Installed Components in the registry
      • Registers new Print Monitor
      • Sets file execution options in registry
      • Modifies system executable filetype association
      • Registers COM server for autorun
      • Adds Run key to start application
      • Installs/modifies Browser Helper Object
      • Maps connected drives based on registry
      • Checks processor information in registry
      • Enumerates system info in registry
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Modifies registry key
      PID:2160

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads