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Resolve FNs for sengrid impersonation #3454

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Merged
merged 2 commits into from
Nov 7, 2025
Merged

Resolve FNs for sengrid impersonation #3454

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f131036
Resolve FNs for sengrid impersonation
IndiaAce Oct 31, 2025
d12c01e
Update brand_impersonation_sendgrid.yml
IndiaAce Oct 31, 2025
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42 changes: 40 additions & 2 deletions detection-rules/brand_impersonation_sendgrid.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,42 @@ source: |
)
)
)
// SendGrid content from non-SendGrid marketing platforms
or (
sender.email.domain.root_domain in (
"selfcast.com",
"mailchimp.com",
"constantcontact.com",
"hubspot.com",
"klaviyo.com",
"mailgun.com"
)
and (
(
(
strings.icontains(body.current_thread.text, "sendgrid")
or strings.icontains(subject.subject, "sendgrid")
)
and 3 of (
strings.icontains(body.current_thread.text, "webhook"),
strings.icontains(body.current_thread.text, "endpoint"),
strings.icontains(body.current_thread.text, "api"),
strings.icontains(body.current_thread.text, "delivery"),
strings.icontains(body.current_thread.text, "event notification")
)
)
and (
// Look for SendGrid-related content with non-SendGrid tracking links
any(body.links,
strings.icontains(.href_url.url, "selfcast.com")
or (
.display_url.url is not null
and strings.icontains(.display_url.url, "sendgrid.com")
)
)
)
)
)
)
and (
// Content analysis using ML/NLU
Expand All @@ -54,7 +90,8 @@ source: |
"Security and Authentication",
"Secure Message",
"Reminders and Notifications",
"Software and App Updates"
"Software and App Updates",
"Customer Service and Support"
)
and .confidence in ("medium", "high")
)
Expand All @@ -63,7 +100,8 @@ source: |
"Security and Authentication",
"Secure Message",
"Reminders and Notifications",
"Software and App Updates"
"Software and App Updates",
"Customer Service and Support"
)
and .confidence in ("medium", "high")
)
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