Detection rules › Sigma
System Drawing DLL Load
Detects processes loading "System.Drawing.ni.dll". This could be an indicator of potential Screen Capture.
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
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Collection |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 7: Image loaded |
Rule body
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
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
ImageLoaded|endswith: '\System.Drawing.ni.dll'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
ImageLoaded | ends_with |
| field:"ImageLoaded" kind:ends_with value:"\System.Drawing.ni.dll" |