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Update impersonation_google_drive_file_share.yml #5293

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Merged
D-Bolton merged 1 commit into from
Sep 10, 2026
+12 −3
Merged

Update impersonation_google_drive_file_share.yml #5293

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15 changes: 12 additions & 3 deletions detection-rules/impersonation_google_drive_file_share.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ type: "rule"
severity: "medium"
source: |
type.inbound

// Google Drive body content looks like this
and (
(
Expand Down Expand Up @@ -138,7 +138,7 @@ source: |
strings.icontains(subject.subject, .)
)
)

// contains logic that impersonates Google
and (
any(ml.logo_detect(file.message_screenshot()).brands,
Expand Down Expand Up @@ -232,6 +232,15 @@ source: |
strings.icontains(body.current_thread.text, '1600 Amphitheatre Parkway'),
strings.icontains(body.current_thread.text, 'Mountain View, CA 94043'),
)
or (
html.xpath(body.html, "//span[contains(@style, 'color')]").nodes[0].display_text == 'G'
and html.xpath(body.html, "//span[contains(@style, 'color')]").nodes[1].display_text == 'o'
and html.xpath(body.html, "//span[contains(@style, 'color')]").nodes[2].display_text == 'o'
and html.xpath(body.html, "//span[contains(@style, 'color')]").nodes[3].display_text == 'g'
and html.xpath(body.html, "//span[contains(@style, 'color')]").nodes[4].display_text == 'l'
and html.xpath(body.html, "//span[contains(@style, 'color')]").nodes[5].display_text == 'e'
and html.xpath(body.html, "//span[contains(@style, 'color')]").nodes[6].display_text == 'Drive'
)
)
and not (
// Google Sites has been observed abused
Expand All @@ -255,7 +264,7 @@ source: |
.href_url.domain.root_domain == "google.com"
)
)

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