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Add first_name/last_name concat matching to org_vips body/subject rules #4515

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Add first_name/last_name concat matching to org_vips body/subject rules #4515

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010ce33
Add first_name/last_name concat matching to org_vips body/subject rules
IndiaAce May 20, 2026
1658ad9
Auto-format MQL and add rule IDs
May 20, 2026
13ab6e6
Scope reduction: keep only lastname-firstname concat, add parenthetic…
IndiaAce May 29, 2026
3c7644f
Auto-format MQL and add rule IDs
May 29, 2026
c9ede50
Revert regex stripping, restore firstname-lastname concat
IndiaAce May 29, 2026
2ec7528
Guard org_vips name concat against empty first_name/last_name fields
IndiaAce Jun 8, 2026
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38 changes: 36 additions & 2 deletions detection-rules/fake_thread_suspicious_indicators.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -119,8 +119,42 @@ source: |

// body contains name of VIP
(
any($org_vips, strings.icontains(body.html.inner_text, .display_name))
or any($org_vips, strings.icontains(body.plain.raw, .display_name))
any($org_vips,
.display_name != ""
and strings.icontains(body.html.inner_text, .display_name)
or (
.first_name != ""
and .last_name != ""
and strings.icontains(body.html.inner_text,
strings.concat(.first_name, " ", .last_name)
)
)
or (
.first_name != ""
and .last_name != ""
and strings.icontains(body.html.inner_text,
strings.concat(.last_name, ", ", .first_name)
)
)
)
or any($org_vips,
.display_name != ""
and strings.icontains(body.plain.raw, .display_name)
or (
.first_name != ""
and .last_name != ""
and strings.icontains(body.plain.raw,
strings.concat(.first_name, " ", .last_name)
)
)
or (
.first_name != ""
and .last_name != ""
and strings.icontains(body.plain.raw,
strings.concat(.last_name, ", ", .first_name)
)
)
)
),

// new body domain
Expand Down
65 changes: 61 additions & 4 deletions detection-rules/impersonation_google_groups_suspicious.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -9,10 +9,67 @@ source: |
// subject, sender or reply to contains a VIP
and (
any(headers.reply_to,
any($org_vips, strings.contains(.display_name, ..display_name))
any($org_vips,
(
..display_name != ""
and strings.contains(.display_name, ..display_name)
)
or (
.first_name != ""
and .last_name != ""
and strings.contains(strings.concat(.first_name, " ", .last_name),
..display_name
)
)
or (
.first_name != ""
and .last_name != ""
and strings.contains(strings.concat(.last_name, ", ", .first_name),
..display_name
)
)
)
)
or any($org_vips,
(
.display_name != ""
and strings.contains(subject.subject, .display_name)
)
or (
.first_name != ""
and .last_name != ""
and strings.contains(subject.subject,
strings.concat(.first_name, " ", .last_name)
)
)
or (
.first_name != ""
and .last_name != ""
and strings.contains(subject.subject,
strings.concat(.last_name, ", ", .first_name)
)
)
)
or any($org_vips,
(
.display_name != ""
and strings.contains(sender.display_name, .display_name)
)
or (
.first_name != ""
and .last_name != ""
and strings.contains(sender.display_name,
strings.concat(.first_name, " ", .last_name)
)
)
or (
.first_name != ""
and .last_name != ""
and strings.contains(sender.display_name,
strings.concat(.last_name, ", ", .first_name)
)
)
)
or any($org_vips, strings.contains(subject.subject, .display_name))
or any($org_vips, strings.contains(sender.display_name, .display_name))
)
and any(headers.hops,
any(.fields,
Expand Down Expand Up @@ -53,7 +110,7 @@ source: |
)
),

// reply-to is freemail
// reply-to is freemail
any(headers.reply_to, .email.domain.domain in $free_email_providers),

// reply-to is not in $recipient_emails
Expand Down
48 changes: 46 additions & 2 deletions detection-rules/service_abuse_trello_board_invite_vip.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,26 @@ source: |
// org_sld as the start of the board name with the org_vip as the sender
any(html.xpath(body.html, '//h2').nodes,
// org vip
any($org_vips, strings.icontains(..display_text, .display_name))
any($org_vips,
(
.display_name != ""
and strings.icontains(..display_text, .display_name)
)
or (
.first_name != ""
and .last_name != ""
and strings.icontains(..display_text,
strings.concat(.first_name, " ", .last_name)
)
)
or (
.first_name != ""
and .last_name != ""
and strings.icontains(..display_text,
strings.concat(.last_name, ", ", .first_name)
)
)
)
// org sld as the board name
and any($org_slds,
strings.icontains(..display_text,
Expand All @@ -41,7 +60,32 @@ source: |
).nodes,
strings.starts_with(.display_text, 'A note from ')
and strings.iends_with(.display_text, 'From')
and any($org_vips, strings.icontains(..display_text, .display_name))
and any($org_vips,
(
.display_name != ""
and strings.icontains(..display_text, .display_name)
)
or (
.first_name != ""
and .last_name != ""
and strings.icontains(..display_text,
strings.concat(.first_name,
" ",
.last_name
)
)
)
or (
.first_name != ""
and .last_name != ""
and strings.icontains(..display_text,
strings.concat(.last_name,
", ",
.first_name
)
)
)
)
)
)
attack_types:
Expand Down
43 changes: 40 additions & 3 deletions detection-rules/vip_impersonation_charity.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -17,8 +17,46 @@ source: |
.name == "request"
)
and (
any($org_vips, strings.icontains(body.html.inner_text, .display_name))
or any($org_vips, strings.icontains(body.plain.raw, .display_name))
any($org_vips,
(
.display_name != ""
and strings.icontains(body.html.inner_text, .display_name)
)
or (
.first_name != ""
and .last_name != ""
and strings.icontains(body.html.inner_text,
strings.concat(.first_name, " ", .last_name)
)
)
or (
.first_name != ""
and .last_name != ""
and strings.icontains(body.html.inner_text,
strings.concat(.last_name, ", ", .first_name)
)
)
)
or any($org_vips,
(
.display_name != ""
and strings.icontains(body.plain.raw, .display_name)
)
or (
.first_name != ""
and .last_name != ""
and strings.icontains(body.plain.raw,
strings.concat(.first_name, " ", .last_name)
)
)
or (
.first_name != ""
and .last_name != ""
and strings.icontains(body.plain.raw,
strings.concat(.last_name, ", ", .first_name)
)
)
)
)
and (
(
Expand Down Expand Up @@ -57,7 +95,6 @@ source: |
or profile.by_sender().days_known > 30
)
and not profile.by_sender().any_messages_benign

attack_types:
- "BEC/Fraud"
tactics_and_techniques:
Expand Down
71 changes: 63 additions & 8 deletions detection-rules/vip_impersonation_fake_thread.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -5,16 +5,71 @@ severity: "medium"
source: |
type.inbound
and any($org_vips,
strings.icontains(body.html.display_text,
strings.concat("From: ", .display_name, " <")
)
and not strings.icontains(body.html.display_text,
(
(
.display_name != ""
and strings.icontains(body.html.display_text,
strings.concat("From: ", .display_name, " <")
)
)
or (
.first_name != ""
and .last_name != ""
and strings.icontains(body.html.display_text,
strings.concat("From: ",
strings.concat(.first_name,
" ",
.last_name
),
" <"
)
)
)
or (
.first_name != ""
and .last_name != ""
and strings.icontains(body.html.display_text,
strings.concat("From: ",
.display_name,
" <",
.email,
">"
strings.concat(.last_name,
", ",
.first_name
),
" <"
)
)
)
)
and not (
strings.icontains(body.html.display_text,
strings.concat("From: ",
.display_name,
" <",
.email,
">"
)
)
or strings.icontains(body.html.display_text,
strings.concat("From: ",
strings.concat(.first_name,
" ",
.last_name
),
" <",
.email,
">"
)
)
or strings.icontains(body.html.display_text,
strings.concat("From: ",
strings.concat(.last_name,
", ",
.first_name
),
" <",
.email,
">"
)
)
)
)
and any([body.current_thread.text, body.html.display_text, body.plain.raw],
Expand Down
43 changes: 40 additions & 3 deletions detection-rules/vip_impersonation_subject.yml
View file
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,23 @@ severity: "medium"
source: |
type.inbound
and any($org_vips,
strings.contains(subject.subject, .display_name)
(
strings.contains(subject.subject, .display_name)
or (
.first_name != ""
and .last_name != ""
and strings.contains(subject.subject,
strings.concat(.first_name, " ", .last_name)
)
)
or (
.first_name != ""
and .last_name != ""
and strings.contains(subject.subject,
strings.concat(.last_name, ", ", .first_name)
)
)
)
and strings.contains(.display_name, " ")
)
// not being sent to said VIP
Expand All @@ -23,7 +39,29 @@ source: |
and all(recipients.to,
any($org_vips,
.email == ..email.email
and strings.contains(subject.subject, .display_name)
and (
strings.contains(subject.subject, .display_name)
or (
.first_name != ""
and .last_name != ""
and strings.contains(subject.subject,
strings.concat(.first_name,
" ",
.last_name
)
)
)
or (
.first_name != ""
and .last_name != ""
and strings.contains(subject.subject,
strings.concat(.last_name,
", ",
.first_name
)
)
)
)
and strings.contains(.display_name, " ")
)
)
Expand Down Expand Up @@ -77,7 +115,6 @@ source: |
)
or sender.email.domain.root_domain not in $high_trust_sender_root_domains
)

tags:
- "Attack surface reduction"
attack_types:
Expand Down
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