Loaded Module Enumeration Via Tasklist.EXE


Description

Detects the enumeration of a specific DLL or EXE being used by a binary via "tasklist.exe". This is often used by attackers in order to find the specific process identifier (PID) that is using the DLL in question. In order to dump the process memory or perform other nefarious actions.

Query · sigma

selection_img:
- Image|endswith: \tasklist.exe
- OriginalFileName: tasklist.exe
selection_flags:
  CommandLine|contains|windash: -m
selection_module:
  CommandLine|contains: rdpcorets.dll
condition: all of selection_*

Known false positives

  • Unknown
Raw source Loaded Module Enumeration Via Tasklist.EXE · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified.
title: Loaded Module Enumeration Via Tasklist.EXE
id: 34275eb8-fa19-436b-b959-3d9ecd53fa1f
status: test
description: |
    Detects the enumeration of a specific DLL or EXE being used by a binary via "tasklist.exe".
    This is often used by attackers in order to find the specific process identifier (PID) that is using the DLL in question.
    In order to dump the process memory or perform other nefarious actions.
references:
    - https://www.n00py.io/2021/05/dumping-plaintext-rdp-credentials-from-svchost-exe/
    - https://pentestlab.blog/tag/svchost/
author: Swachchhanda Shrawan Poudel
date: 2024-02-12
modified: 2024-03-13
tags:
    - attack.t1003
    - attack.credential-access
logsource:
    product: windows
    category: process_creation
detection:
    selection_img:
        - Image|endswith: '\tasklist.exe'
        - OriginalFileName: 'tasklist.exe'
    selection_flags:
        CommandLine|contains|windash: '-m'
    selection_module:
        # Note: add other interesting modules or binaries
        CommandLine|contains: 'rdpcorets.dll'
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium

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