Sigma rule: System Drawing DLL Load

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-09163e6de28c, updated 2023-02-22T00:00:00.000Z.

Rule

Title
System Drawing DLL Load
Status
test
Level
low
Author
Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)
Date
2020-05-02
Modified
2023-02-22
File
rules-threat-hunting/windows/image_load/image_load_dll_system_drawing_load.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

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

Log source

product
windows
category
image_load

Detection

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

False positives (as the rule lists them)

  • 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

Tags

  • attack.collection
  • attack.t1113
  • detection.threat-hunting

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-threat-hunting/windows/image_load/image_load_dll_system_drawing_load.yml

Sources and licences

  • SigmaHQ

    "System Drawing DLL Load" by Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-threat-hunting/windows/image_load/image_load_dll_system_drawing_load.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: System Drawing DLL Load",
entity page, dataset version ref-09163e6de28c, updated 2023-02-22T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/666ecfc7-229d-42b8-821e-1a8f8cb7057c (accessed 2026-11-03).
Underlying source: SigmaHQ rule 666ecfc7-229d-42b8-821e-1a8f8cb7057c, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.