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Update brand_impersonation_robinhood.yml #4319

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Update brand_impersonation_robinhood.yml #4319

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85b66a1
Update brand_impersonation_robinhood.yml
cybher0808 Apr 6, 2026
e215644
Revisions to brand impersonation detection rule
cybher0808 Apr 10, 2026
ee3ea2c
Update brand_impersonation_robinhood.yml
cybher0808 Apr 14, 2026
e09e857
Auto-format MQL and add rule IDs
Apr 14, 2026
017cf4b
Revise brand impersonation detection rules for Robinhood
cybher0808 Apr 14, 2026
fb227a6
Auto-format MQL and add rule IDs
Apr 14, 2026
d9b65cf
Updating format and revising logic
cybher0808 Apr 26, 2026
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26 changes: 22 additions & 4 deletions detection-rules/brand_impersonation_robinhood.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -17,10 +17,16 @@ source: |
)
or strings.icontains(body.current_thread.text, 'The Robinhood Team')
or regex.icontains(body.current_thread.text, '©\s*20[0-9]{2}\s*\s*Robinhood')
or strings.icontains(body.current_thread.text, "(888) 344-3957")
or strings.icontains(body.current_thread.text, "Financial LLC (Member SIPC)")
or strings.icontains(body.current_thread.text,
"Securities, LLC (Member SIPC)"
)
or 2 of (
strings.icontains(body.current_thread.text, "Robinhood"),
regex.icontains(body.current_thread.text, '42 Willow (?:Road|St)'),
strings.icontains(body.current_thread.text, "Menlo Park, CA 97095")
strings.icontains(body.current_thread.text, "Menlo Park, CA 97095"),
regex.icontains(body.current_thread.text, 'Email ID:?')
)
or (
strings.icontains(sender.display_name, 'Robinhood')
Expand All @@ -29,9 +35,15 @@ source: |
regex.icontains(body.current_thread.text, 'Location:?'),
regex.icontains(body.current_thread.text, 'Time:'),
regex.icontains(body.current_thread.text, 'Device:?'),
regex.icontains(body.current_thread.text, 'IP Address:?')
regex.icontains(body.current_thread.text, 'IP Address:?'),
regex.icontains(body.current_thread.text, 'Date:'),
regex.icontains(body.current_thread.text, 'Region:?'),
regex.icontains(body.current_thread.text, 'App:?'),
)
or strings.icontains(body.current_thread.text, "new passkey added")
or strings.icontains(body.current_thread.text,
"Security support phone number:"
)
)
)
or (
Expand Down Expand Up @@ -67,9 +79,16 @@ source: |
)
// negate newsletters and webinars
and not any(ml.nlu_classifier(body.current_thread.text).topics,
.name in ("Newsletters and Digests", "Events and Webinars")
.name in (
"Newsletters and Digests",
"Health and Wellness",
"Events and Webinars"
)
and .confidence == "high"
)
and not any(ml.nlu_classifier(body.current_thread.text).intents,
.name == "benign" and .confidence == "high"
)
and not (
sender.email.domain.root_domain in (
"robinhood.com",
Expand All @@ -80,7 +99,6 @@ source: |
)
and coalesce(headers.auth_summary.dmarc.pass, false)
)

attack_types:
- "Credential Phishing"
tactics_and_techniques:
Expand Down
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