microsoft / microsoft/MHA

Rule: Alert when From and Reply-To are different

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#21 1 comment 0 reactions 0 assignees View on GitHub

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enhancement good first issue
Dominant language
TypeScript
Stars
385
Forks
66
Avg merge
2d 16h
Merged PRs (30d)
18

Description

Not that it's always bad, but it is a hallmark of phishing, so may be worth calling out

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the existing message-header analysis rules and the alert entry point in the TypeScript Outlook add-in. Confirm how From and Reply-To values are exposed, then define the alert behavior for mismatches and verify it with representative messages.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript
Domain
security
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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