Windows Process Loads System.Drawing.ni.dll

Alerts when a Windows process loads System.Drawing.ni.dll, which may indicate visual data collection activity.

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windows-process-loads-system-drawing-ni-dll-666ecfc7

title: Windows Process Loads System.Drawing.ni.dll
id: 033b6e8f-6327-4672-a278-6d00c1e2acb8
status: test
description: This rule flags Windows processes that load a DLL named System.Drawing.ni.dll. Loading this component can be associated with image or screen capture workflows used to collect visual data. The detection relies on image load telemetry that records when a process maps a DLL file with the specified filename suffix.
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
  - https://github.com/SigmaHQ/sigma/blob/master/rules-threat-hunting/windows/image_load/image_load_dll_system_drawing_load.yml
author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research), Huntrule Team
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
license: DRL-1.1
related:
  - id: 666ecfc7-229d-42b8-821e-1a8f8cb7057c
    type: derived

What it detects

This rule flags Windows processes that load a DLL named System.Drawing.ni.dll. Loading this component can be associated with image or screen capture workflows used to collect visual data. The detection relies on image load telemetry that records when a process maps a DLL file with the specified filename suffix.

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

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.