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Update impersonation_employee_urgent_request.yml #4376

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Update impersonation_employee_urgent_request.yml #4376

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20 changes: 18 additions & 2 deletions detection-rules/impersonation_employee_urgent_request.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,22 @@ source: |
and not strings.istarts_with(subject.subject, "fwd:")
)
)
or (
any(ml.nlu_classifier(body.current_thread.text).entities,
.name == "request"
)
and sender.email.domain.root_domain in $free_email_providers
and any(headers.hops,
any(.fields,
.name == "X-Forefront-Antispam-Report"
and (
strings.icontains(.value, "CAT:PHISH")
or strings.icontains(.value, "CAT:SPOOF")
or strings.icontains(.value, "CAT:HSPM")
)
)
)
)
)
and (
(
Expand All @@ -50,7 +66,7 @@ source: |
)
or (
profile.by_sender().any_messages_malicious_or_spam
and not profile.by_sender().any_false_positives
and not profile.by_sender().any_messages_benign
)
or not headers.auth_summary.dmarc.pass
)
Expand All @@ -72,7 +88,7 @@ source: |
)
or sender.email.domain.root_domain not in $high_trust_sender_root_domains
)
and not profile.by_sender().any_false_positives
and not profile.by_sender().any_messages_benign
attack_types:
- "BEC/Fraud"
tactics_and_techniques:
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