High Severity
VIP impersonation with urgent request (untrusted sender)
Description
Sender is using a display name that matches the display name of someone in your $org_vips list.
Detects potential Business Email Compromise (BEC) attacks by analyzing text within email body from untrusted senders.
References
No references.
Sublime Security
Created Aug 17th, 2023 • Last updated Apr 23rd, 2024
Feed Source
Sublime Core Feed
Source
type.inbound
and any($org_vips, .display_name =~ sender.display_name)
and (
any(ml.nlu_classifier(body.current_thread.text).intents,
.name == "bec" and .confidence in ("medium", "high")
)
or (
any(ml.nlu_classifier(body.current_thread.text).entities,
.name == "urgency"
)
and any(ml.nlu_classifier(body.current_thread.text).entities,
.name == "request"
)
)
)
and (
(
profile.by_sender().prevalence != "common"
and not profile.by_sender().solicited
)
or (
profile.by_sender().any_messages_malicious_or_spam
and not profile.by_sender().any_false_positives
)
)
// 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_false_positives
Playground
Test against your own EMLs or sample data.