System Drawing DLL Load

Description

Detects processes loading "System.Drawing.ni.dll". This could be an indicator of potential Screen Capture.

Query · sigma

selection:
  ImageLoaded|endswith: \System.Drawing.ni.dll
condition: selection

Known false positives

  • False positives are very common from system and third party applications, activity needs to be investigated. This rule is best correlated with other events to increase the level of suspiciousness
Raw source System Drawing DLL Load · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: System Drawing DLL Load
id: 666ecfc7-229d-42b8-821e-1a8f8cb7057c
status: test
description: Detects processes loading "System.Drawing.ni.dll". This could be an indicator of potential Screen Capture.
references:
    - https://github.com/OTRF/detection-hackathon-apt29/issues/16
    - https://github.com/OTRF/ThreatHunter-Playbook/blob/2d4257f630f4c9770f78d0c1df059f891ffc3fec/docs/evals/apt29/detections/7.A.1_3B4E5808-3C71-406A-B181-17B0CE3178C9.md
author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)
date: 2020-05-02
modified: 2023-02-22
tags:
    - attack.collection
    - attack.t1113
    - detection.threat-hunting
logsource:
    product: windows
    category: image_load
detection:
    selection:
        ImageLoaded|endswith: '\System.Drawing.ni.dll'
    condition: selection
falsepositives:
    - False positives are very common from system and third party applications, activity needs to be investigated. This rule is best correlated with other events to increase the level of suspiciousness
level: low

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