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Refine regex patterns for spam detection rules #3463

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Refine regex patterns for spam detection rules #3463

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29 changes: 19 additions & 10 deletions detection-rules/spam_website_errors_solicitation.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -9,28 +9,37 @@ source: |
or not profile.by_sender().solicited
)
and 1 of (
// Single thread message groups
// Single thread message groups
(
length(attachments) == 0
and length(body.links) == 0
and length(body.previous_threads) == 0
and 20 < length(body.current_thread.text) < 500
and regex.icontains(body.current_thread.text, "screenshot")
and regex.icontains(body.current_thread.text, '.*(hi|hello|hey)')
and regex.icontains(body.current_thread.text, "screenshot|error list|plan")
and regex.icontains(body.current_thread.text, ".*(hi|hello|hey)")
and regex.icontains(body.current_thread.text, ".*(error|report|issues)")
and regex.icontains(subject.subject, ".*(proposal|cost|report|error|audit|screenshot)")
and regex.icontains(body.current_thread.text, ".*(site|website)")
and regex.icontains(subject.subject,
".*(proposal|cost|report|error|audit|screenshot)"
)
),
// Single thread message groups but with 1 unsubscribe link
// Single thread message groups but with 1 unsubscribe link or link is recipient
(
length(attachments) == 0
and length(body.links) == 1
and regex.icontains(body.html.raw, "mailto:*[++unsubscribe@]")
and (
regex.icontains(body.html.raw, "mailto:*[++unsubscribe@]")
or any(body.links, .href_url.domain.root_domain in~ $org_domains)
)
and length(body.previous_threads) == 0
and 20 < length(body.current_thread.text) < 500
and regex.icontains(body.current_thread.text, "screenshot")
and regex.icontains(body.current_thread.text, '.*(hi|hello|hey)')
and regex.icontains(body.current_thread.text, "screenshot|error list|plan")
and regex.icontains(body.current_thread.text, ".*(hi|hello|hey)")
and regex.icontains(body.current_thread.text, ".*(error|report|issues)")
and regex.icontains(subject.subject, ".*(proposal|cost|report|error|audit|screenshot)")
and regex.icontains(body.current_thread.text, ".*(site|website)")
and regex.icontains(subject.subject,
".*(proposal|cost|report|error|audit|screenshot)"
)
),
// Multiple thread message groups
(
Expand All @@ -41,7 +50,7 @@ source: |
and any(body.previous_threads,
length(.text) < 400
and regex.icontains(.text, '.*(hey|hi|hello)')
and regex.icontains(.text, ".*(error|screenshot|report)")
and regex.icontains(.text, '.*(\berror(?:\s+list)?\b|screenshot|report|plan)')
and strings.count(.text, "?") >= 3
and ml.nlu_classifier(.text).language == "english"
)
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