Medium Severity

Link: Flagged bit.ly link

Description

Shortened link is blocked or gated by bit.ly. Indicator of malicious email.

References

No references.

Sublime Security
Created Aug 17th, 2023 • Last updated Sep 23rd, 2026
Source
type.inbound
and any(body.links,
        // contains bit.ly link
        .href_url.domain.root_domain == "bit.ly"
        // link doesn't forward through
        and ml.link_analysis(.).effective_url.domain.domain == "bit.ly"
        // blocked or gated by bit.ly
        and strings.ilike(ml.link_analysis(.).final_dom.display_text,
                          "*link*blocked*",
                          "*flagged*by*"
        )
)

// negate highly trusted sender domains unless they fail DMARC authentication
and not (
  sender.email.domain.root_domain in $high_trust_sender_root_domains
  and coalesce(headers.auth_summary.dmarc.pass, false)
)
and (
  not profile.by_sender().solicited
  or (
    profile.by_sender().any_messages_malicious_or_spam
    and not profile.by_sender().any_messages_benign
  )
)
and not profile.by_sender().any_messages_benign
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