Description

Detects inbound messages where the sender name claims to be Google Authenticator, but the sending domain is not associated with Google or Okta and fails DMARC authentication, indicating a likely impersonation of the two-factor authentication service.

References

No references.

Sublime Security
Created Oct 2nd, 2026 • Last updated Oct 2nd, 2026
Source
type.inbound
and any(ml.nlu_classifier(body.current_thread.text).entities,
        .name == "sender" and strings.icontains(.text, "Google Authenticator")
)
and not (
  sender.email.domain.root_domain in ("google.com", "okta.com")
  and coalesce(headers.auth_summary.dmarc.pass, false)
)
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