type.inbound
and (
// few links
0 < length(body.links) < 20
// fewer unique root domain links
and length(distinct(body.links, .href_url.domain.root_domain)) < 10
// sender domain matches no body domains
and all(body.links,
.href_url.domain.root_domain != sender.email.domain.root_domain
// sender email address in body looks like this
or .href_url.url == sender.email.domain.root_domain
)
)
// negate bouncebacks and undeliverables
and not any(attachments,
.content_type in (
"message/global-delivery-status",
"message/delivery-status"
)
)
// suspicious subject or display name
and (
regex.icontains(subject.subject,
"termination.*notice",
"38417",
":completed",
"[il1]{2}mit.*ma[il1]{2} ?bo?x",
"[il][il][il]egai[ -]",
"[li][li][li]ega[li] attempt",
"[ng]-?[io]n .*block",
"[ng]-?[io]n .*cancel",
"[ng]-?[io]n .*deactiv",
"[ng]-?[io]n .*disabl",
"action.*required",
"abandon.*package",
"about.your.account",
"acc(ou)?n?t (is )?on ho[li]d",
"acc(ou)?n?t.*terminat",
"acc(oun)?t.*[il1]{2}mitation",
"access.*limitation",
"account (will be )?block",
"account.*de-?activat",
"account.*locked",
"account.*re-verification",
"account.*security",
"account.*suspension",
"account.has.been",
"account.has.expired",
"account.will.be.blocked",
"account v[il]o[li]at",
"activity.*acc(oun)?t",
"almost.full",
"app[li]e.[il]d",
"authenticate.*account",
"been.*suspend",
"clos.*of.*account.*processed",
"confirm.your.account",
"courier.*able",
"crediential.*notif",
"deactivation.*in.*progress",
"delivery.*attempt.*failed",
"document.received",
"documented.*shared.*with.*you",
"dropbox.*document",
"e-?ma[il1]+ .{010}suspen",
"e-?ma[il1]{1} user",
"e-?ma[il1]{2} acc",
"e-?ma[il1]{2}.*up.?grade",
"e.?ma[il1]{2}.*server",
"e.?ma[il1]{2}.*suspend",
"email.update",
"faxed you",
"fraud(ulent)?.*charge",
"from.helpdesk",
"fu[il1]{2}.*ma[il1]+[ -]?box",
"has.been.*suspended",
"has.been.limited",
"have.locked",
"he[li]p ?desk upgrade",
"heipdesk",
"i[il]iega[il]",
"ii[il]ega[il]",
"incoming e?mail",
"incoming.*fax",
"lock.*security",
"ma[il1]{1}[ -]?box.*quo",
"ma[il1]{2}[ -]?box.*fu[il1]",
"ma[il1]{2}box.*[il1]{2}mit",
"ma[il1]{2}box stor",
"mail on.?hold",
"mail.*box.*migration",
"mail.*de-?activat",
"mail.update.required",
"mails.*pending",
"messages.*pending",
"missed.*shipping.*notification",
"missed.shipment.notification",
"must.update.your.account",
"new [sl][io]g?[nig][ -]?in from",
"new voice ?-?mail",
"notifications.*pending",
"office.*3.*6.*5.*suspend",
"office365",
"on google docs with you",
"online doc",
"password.*compromised",
"periodic maintenance",
"potential(ly)? unauthorized",
"refund not approved",
"report",
"revised.*policy",
"scam",
"scanned.?invoice",
"secured?.update",
"security breach",
"securlty",
"signed.*delivery",
"statement is ready",
"status of your .{314}? ?delivery",
"susp[il1]+c[il1]+ous.*act[il1]+v[il1]+ty",
"suspicious.*sign.*[io]n",
"suspicious.activit",
"temporar(il)?y deactivate",
"temporar[il1]{2}y disab[li]ed",
"temporarily.*lock",
"un-?usua[li].activity",
"unable.*deliver",
"unauthorized.*activit",
"unauthorized.device",
"undelivered message",
"unread.*doc",
"unusual.activity",
"upgrade.*account",
"upgrade.notice",
"urgent message",
"urgent.verification",
"v[il1]o[li1]at[il1]on security",
"va[il1]{1}date.*ma[il1]{2}[ -]?box",
"verification ?-?require",
"verification( )?-?need",
"verify.your?.account",
"web ?-?ma[il1]{2}",
"web[ -]?ma[il1]{2}",
"will.be.suspended",
"your (customer )?account .as",
"your.office.365",
"your.online.access"
)
or any($suspicious_subjects, strings.icontains(subject.subject, .))
or regex.icontains(sender.display_name,
"Admin",
"Administrator",
"Alert",
"Assistant",
"Billing",
"Benefits",
"Bonus",
"CEO",
"CFO",
"CIO",
"CTO",
"Chairman",
"Claim",
"Confirm",
"Critical",
"Customer Service",
"Deal",
"Discount",
"Director",
"Exclusive",
"Executive",
"Fax",
"Free",
"Gift",
"/bHR/b",
"Helpdesk",
"Human Resources",
"Immediate",
"Important",
"Info",
"Information",
"Invoice",
'\bIT\b',
"Legal",
"Lottery",
"Management",
"Manager",
"Member Services",
"Notification",
"Offer",
"Operations",
"Order",
"Partner",
"Payment",
"Payroll",
"President",
"Premium",
"Prize",
"Receipt",
"Refund",
"Registrar",
"Required",
"Reward",
"Sales",
"Secretary",
"Security",
"Service",
"Signature",
"SSA",
"Storage",
"Support",
"Sweepstakes",
"System",
"Tax",
"Tech Support",
"Update",
"Upgrade",
"Urgent",
"Validate",
"Verify",
"VIP",
"Webmaster",
"Winner",
)
or any(body.links,
strings.ends_with(.href_url.url, ".exe")
or .href_url.domain.root_domain in $social_landing_hosts
or .href_url.domain.domain in $free_subdomain_hosts
or .href_url.domain.root_domain in $free_subdomain_hosts
)
)
// link can't be scanned due to Vercel block page
and any(body.links,
strings.icontains(ml.link_analysis(., mode="aggressive").final_dom.display_text,
"Vercel Security Checkpoint"
)
or strings.icontains(ml.link_analysis(., mode="aggressive").final_dom.raw,
'https://vercel.link/security-checkpoint'
)
)
and (
not profile.by_sender_email().solicited
or (
profile.by_sender().any_messages_malicious_or_spam
and not profile.by_sender().any_messages_benign
)
)
// negate highly trusted sender domains unless they fail DMARC authentication
and (
(
sender.email.domain.root_domain in $high_trust_sender_root_domains
and not headers.auth_summary.dmarc.pass
)
or sender.email.domain.root_domain not in $high_trust_sender_root_domains
)
and not profile.by_sender().any_messages_benign
Playground
Test against your own EMLs or sample data.