mandiant/capa-rules

false negative for screenshot

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#981 opened on Jan 17, 2025

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false negativegood first issuehelp wanted

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Description

nice example - false negative for the more specific branch GetDC/BitBlt/CreateCompatibleDC.

maybe we need to:

  • add DISPLAY* to CreateDC
  • add Gdip routines (GdipCreateBitmapFromScan0, GdipGetImageGraphicsContext, GdipGetDC)

Originally posted by @williballenthin in https://github.com/mandiant/capa/pull/2532#discussion_r1920802278

Contributor guide

Research direction
Investigate the false negative case by examining the referenced pull request discussion, then add the missing API calls (CreateDC with DISPLAY* and Gdip routines) to the relevant rule.
Tech stack
None
Domain
reverse engineering
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Windows API
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
80