Sublime Security high experimental mql
Suspicious request for financial information
Email is from a suspicious sender and contains a request for financial information, such as AR reports.
Detection Logic
type.inbound
and length(attachments) <= 1
and length(recipients.to) <= 2
// suspicious sender
and (
(
length(headers.reply_to) > 0
and all(headers.reply_to,
.email.domain.root_domain != sender.email.domain.root_domain
and .email.domain.root_domain not in $org_domains
)
)
or sender.email.domain.root_domain in $free_email_providers
or profile.by_sender().days_known < 3
)
// specific financial language
and (
regex.icontains(subject.subject,
'\b(Aged
| Age?ing) (Payables
| Receivables
| Report)',
'reconcill?iation (report
| statement).*(issued (settlement
| advice)s?)
| billing records?'
)
or (
regex.icontains(body.current_thread.text,
'\b(Aged
| Age?ing) (?:Collection
| Payables
| Receivables
| Report)',
'(latest
| updated
| recent) (\bAR\b
| \b\AP\b
| \bAR\b \& \bAP\b
| accounts?) (?:Aging
| Payables
| Receivables
| Reports)',
'(shared?
| send
| forward
| provide).*remittance (advice
| receipts?
| statements?)'
)
or strings.icontains(body.current_thread.text,
"copy of a current statement"
)
or (
strings.icontains(body.current_thread.text, "please send all past due")
and strings.icontains(body.current_thread.text, "current invoices")
)
)
// suspicious link display text
or (
any(body.links,
regex.icontains(.display_text,
'(Payment
| Remittance
| Settlement
| Transfer) ?Batch',
)
)
)
// suspicious sender display name
or (
regex.icontains(sender.display_name,
'Accounts? (?:Payable (?:Dep(\.
| t\.?
| artment)
| e?Receipt)
| (Co[[:punct:]]?ordinator
| Admin
| Manager
| Payee))'
)
// sender email listed as a recipient or recipients undisclosed/null
and (
(
sender.email.email in map(recipients.to, .email.email)
or (length(recipients.to) == 0 or length(recipients.to) is null)
)
// non-benign nlu intent
or any(ml.nlu_classifier(body.current_thread.text).intents,
.name != "benign"
)
)
)
or (
any(ml.nlu_classifier(body.current_thread.text).intents,
.name == "cred_theft" and .confidence == "high"
)
and any(ml.nlu_classifier(body.current_thread.text).entities,
.name == "financial" and .text =~ "remittance"
)
)
)
// negate resume related/job inquiry outreach
and not (
any(ml.nlu_classifier(body.current_thread.text).topics,
.name == "Professional and Career Development" and .confidence == "high"
)
and any(ml.nlu_classifier(body.current_thread.text).intents,
.name == "benign" and .confidence != "low"
)
)
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 Field Validations
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