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Update link_url_with_recipient_targeting_and_special_characters.yml #3747

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Update link_url_with_recipient_targeting_and_special_characters.yml #3747

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28 changes: 10 additions & 18 deletions detection-rules/link_url_with_recipient_targeting_and_special_characters.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -7,33 +7,25 @@ source: |
and length(recipients.to) == 1
and recipients.to[0].email.domain.valid
and any(body.current_thread.links,
// special char in the path
(
strings.icontains(.href_url.path, '!')
or strings.icontains(.href_url.path, '@')
)
// a single path
and strings.count(.href_url.path, '/') == 2
strings.count(.href_url.path, '/') == 2
// special chars
and (
strings.icontains(.href_url.path, '/$')
or strings.icontains(.href_url.path, '/*')
or strings.icontains(.href_url.url, '/#')
)
// recipient email in url or path
and (
(
strings.icontains(.href_url.path, recipients.to[0].email.email)
or strings.icontains(.href_url.fragment,
recipients.to[0].email.email
)
or any(strings.scan_base64(.href_url.path, ignore_padding=true),
strings.icontains(., recipients.to[0].email.email)
)
or any(strings.scan_base64(.href_url.fragment, ignore_padding=true),
strings.icontains(., recipients.to[0].email.email)
)
strings.icontains(.href_url.path, recipients.to[0].email.email)
or any(strings.scan_base64(.href_url.url,
ignore_padding=true,
format="url"
),
strings.icontains(., recipients.to[0].email.email)
)
)
)

attack_types:
- "Credential Phishing"
tactics_and_techniques:
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