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Add "ICS Phishing" TTP to calendar/ICS rules#4344

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aidenmitchell wants to merge 2 commits intomainfrom
add-ics-phishing-attack-type
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Add "ICS Phishing" TTP to calendar/ICS rules#4344
aidenmitchell wants to merge 2 commits intomainfrom
add-ics-phishing-attack-type

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@aidenmitchell aidenmitchell commented Apr 14, 2026

Summary

  • Adds "ICS Phishing" as a value to tactics_and_techniques across 18 calendar invite / ICS phishing-related detection rules
  • Covers attachment_ics_* rules, HTML smuggling rules delivering ICS files, Google Calendar abuse, and calendar invite callback phishing rules

🤖 Generated with Claude Code

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
@aidenmitchell aidenmitchell requested a review from a team April 14, 2026 18:07
@aidenmitchell aidenmitchell requested a review from a team as a code owner April 14, 2026 18:07
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Shared Samples Sync - Excluded

This PR contains 18 rules, which exceeds the maximum of 10 rules allowed per PR for automatic syncing.

This limit helps ensure the shared-samples environment remains manageable. If you need to test these rules, consider:

  • Splitting the PR into smaller PRs with fewer rules
  • Contacting Detection Operations to request a manual sync

@github-actions github-actions Bot added the test-rules:excluded:bulk_rules Bulk rule update, excluded from test rules label Apr 14, 2026
zoomequipd
zoomequipd previously approved these changes Apr 14, 2026
@zoomequipd zoomequipd dismissed their stale review April 20, 2026 15:29

waiting feedback from product on attack type vs ttp

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
@aidenmitchell aidenmitchell changed the title Add "ICS Phishing" attack type to calendar/ICS rules Add "ICS Phishing" TTP to calendar/ICS rules Apr 22, 2026
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