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Changes to Docusign rule to reduce false positives. #1083

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merged 4 commits into from
Dec 5, 2023
Merged

Changes to Docusign rule to reduce false positives. #1083

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4046836
Update rule so that emails from Docusign with multiple links do not c…
aslefhewqiwbepqwefbpqsciwueh Dec 5, 2023
a7977cc
Add check for docusign sender
aslefhewqiwbepqwefbpqsciwueh Dec 5, 2023
dd5af03
Update detection-rules/credential_phishing_docusign_embedded_image_lu…
aslefhewqiwbepqwefbpqsciwueh Dec 5, 2023
c5eef75
Update detection-rules/credential_phishing_docusign_embedded_image_lu…
aslefhewqiwbepqwefbpqsciwueh Dec 5, 2023
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6 changes: 5 additions & 1 deletion detection-rules/credential_phishing_docusign_embedded_image_lure.yml
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Expand Up @@ -5,7 +5,7 @@ severity: "high"
source: |
type.inbound
and length(attachments) <= 1
and any(body.links,
and all(body.links,
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not strings.ilike(.href_url.domain.root_domain, "docusign.*")
)
and (
Expand Down Expand Up @@ -34,6 +34,10 @@ source: |
and not profile.by_sender().any_false_positives
)
)

//negate sender from Docusign
and not strings.like(sender.email.domain.root_domain, "docusign.com")

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// negate highly trusted sender domains unless they fail DMARC authentication
and
(
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