Update fake_thread_suspicious_indicators.yml to #3741
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Account for mimecast secure message product which does not include references/in-reply-to header when delivering "inbound" meessages from the web portal to the mimecast customer's mail provider.
zoomequipd
added
the
in-test-rules
zoomequipd
commented
Jan 8, 2026
Comment on lines
-44
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-46
| and ( | ||
| length(headers.references) == 0 | ||
| or headers.in_reply_to is null |
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the removal is intentional, it's duplicate logic from from lines 8
https://github.com/sublime-security/sublime-rules/pull/3741/changes#diff-3d2719ed8517959284825ea9302cd28685516a3eed9fad2018b278615f6c794dL8
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FP reduction, should be good to go |
IndiaAce
approved these changes
Jan 8, 2026
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Description
Account for mimecast secure message product which does not include references/in-reply-to header when delivering "inbound" messages from the web portal to the mimecast customer's mail provider.
Remove duplicate detection logic
Associated hunts
samples that will no longer match this rule (assuming they met the 4 of logic in the rule)