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Create self_sender_display_name_email_in_subject.yml#4285

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daniel.fn.ESC-9460.has-sent-you-a-protected-message
Apr 16, 2026
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Create self_sender_display_name_email_in_subject.yml#4285
D-Bolton merged 9 commits intomainfrom
daniel.fn.ESC-9460.has-sent-you-a-protected-message

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@D-Bolton D-Bolton commented Mar 31, 2026

Description

Detects messages where the sender emails themselves with both their email address and display name present in the subject line, while the email address differs from the display name.

Associated samples

Associated hunts

  • Hunt 1
  • Multi-hunts in ESC-9460

@D-Bolton D-Bolton marked this pull request as ready for review March 31, 2026 19:13
@D-Bolton D-Bolton requested a review from a team March 31, 2026 19:13
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@github-actions github-actions bot added the in-test-rules PR is in our testing suite to collect telemetry label Mar 31, 2026
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@D-Bolton D-Bolton added the review-needed Indicates that a PR is waiting for review label Apr 2, 2026
@D-Bolton D-Bolton removed the review-needed Indicates that a PR is waiting for review label Apr 2, 2026
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D-Bolton commented Apr 2, 2026

This rule is ready. @peterdj45 will review mode results on Monday.

@D-Bolton D-Bolton requested a review from peterdj45 April 2, 2026 20:15
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Found some FPs in test rules, primarily messages sent via Hearsay Social (social media marketing platform). Example: https://platform.sublime.security/messages/50471e1a18de024481af14a3b2e7f8c8fe9fff30c14456f355e24c6d3234ae4c

Could maybe negate these via presence of X-HearsaySocial headers? or the message ID, which is hearsaysystems.com. Happy to jam on this if you'd like!

Comment thread detection-rules/self_sender_display_name_email_in_subject.yml Outdated
Co-authored-by: Peter Djordjevic <116412909+peterdj45@users.noreply.github.com>
github-actions bot added a commit that referenced this pull request Apr 9, 2026
github-actions bot added a commit to IndiaAce/sublime-rules that referenced this pull request Apr 9, 2026
github-actions bot added a commit that referenced this pull request Apr 9, 2026
github-actions bot added a commit that referenced this pull request Apr 10, 2026
github-actions bot added a commit that referenced this pull request Apr 10, 2026
…rench copy/paste instructions and suspicious domains
github-actions bot added a commit that referenced this pull request Apr 10, 2026
github-actions bot added a commit that referenced this pull request Apr 10, 2026
github-actions bot added a commit to IndiaAce/sublime-rules that referenced this pull request Apr 10, 2026
github-actions bot added a commit to IndiaAce/sublime-rules that referenced this pull request Apr 10, 2026
…French copy/paste instructions and suspicious domains
@D-Bolton D-Bolton requested a review from peterdj45 April 10, 2026 20:05
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Found some FPs in test rules, primarily messages sent via Hearsay Social (social media marketing platform). Example: https://platform.sublime.security/messages/50471e1a18de024481af14a3b2e7f8c8fe9fff30c14456f355e24c6d3234ae4c

Could maybe negate these via presence of X-HearsaySocial headers? or the message ID, which is hearsaysystems.com. Happy to jam on this if you'd like!

I tightened the rule up more. I have multi-hunts in the ESC. Let me know what you think. Thanks!

@D-Bolton D-Bolton added the review-needed Indicates that a PR is waiting for review label Apr 10, 2026
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LGTM! left you some non-blocking feedback

Comment thread detection-rules/self_sender_french_copypaste_instructions_suspicious_domains.yml Outdated
Comment thread detection-rules/self_sender_french_copypaste_instructions_suspicious_domains.yml Outdated
Comment thread detection-rules/self_sender_french_copypaste_instructions_suspicious_domains.yml Outdated
@peterdj45 peterdj45 removed the review-needed Indicates that a PR is waiting for review label Apr 15, 2026
D-Bolton and others added 3 commits April 15, 2026 08:09
…icious_domains.yml

Co-authored-by: Peter Djordjevic <116412909+peterdj45@users.noreply.github.com>
…icious_domains.yml

Co-authored-by: Peter Djordjevic <116412909+peterdj45@users.noreply.github.com>
…icious_domains.yml

Co-authored-by: Peter Djordjevic <116412909+peterdj45@users.noreply.github.com>
github-actions bot added a commit that referenced this pull request Apr 15, 2026
…structions and suspicious domains (French/Français)
github-actions bot added a commit that referenced this pull request Apr 15, 2026
…h copy/paste instructions and suspicious domains (French/Français)
@D-Bolton D-Bolton added the review-needed Indicates that a PR is waiting for review label Apr 15, 2026
@D-Bolton D-Bolton requested a review from IndiaAce April 15, 2026 14:22
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Approved with non-blocking feedback.

github-actions bot added a commit that referenced this pull request Apr 16, 2026
…h copy/paste instructions and suspicious domains (French/Français)
github-actions bot added a commit that referenced this pull request Apr 16, 2026
…structions and suspicious domains (French/Français)
@D-Bolton D-Bolton added this pull request to the merge queue Apr 16, 2026
Merged via the queue into main with commit 2878155 Apr 16, 2026
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@D-Bolton D-Bolton deleted the daniel.fn.ESC-9460.has-sent-you-a-protected-message branch April 16, 2026 17:39
github-actions bot added a commit that referenced this pull request Apr 16, 2026
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