Medium Severity
Brand Impersonation: Navan
Description
Impersonation of the expense management provider Navan.
References
No references.
Sublime Security
Created Apr 4th, 2025 • Last updated Apr 4th, 2025
Feed Source
Sublime Core Feed
Source
type.inbound
and (
regex.icontains(sender.display_name, '(?:The\s+)?\bNavan\b(?:\s+Team)?')
or strings.ilike(sender.email.domain.domain, '*Navan*')
)
and (
any(ml.logo_detect(beta.message_screenshot()).brands,
.name == "Navan" and .confidence in ("medium", "high")
)
or (
regex.icontains(subject.subject,
"(?:unrecognized|Unusual|suspicious|unknown) (?:log|sign).?[io]n attempt",
"(?:important|urgent|attention|alert) account|accessed|[new|unrecognized|suspicious] location"
)
or any(ml.nlu_classifier(body.current_thread.text).entities,
.name == "urgency"
)
or any(ml.nlu_classifier(body.current_thread.text).intents,
.name in ("cred_theft", "steal_pii")
)
)
)
and sender.email.domain.root_domain not in~ ('navan.com')
// 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().solicited
or (
profile.by_sender().any_messages_malicious_or_spam
and not profile.by_sender().any_false_positives
)
)
and not profile.by_sender().any_false_positives
Playground
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