• Sublime Core Feed
Medium Severity

Link: Direct link to riddle.com hosted showcase

Description

Message contains a single link to a Riddle.com hosted showcase which has been observed abused for credential phishing landing

References

No references.

Sublime Security
Created Aug 19th, 2025 • Last updated Jan 12th, 2026
Source
type.inbound
and length(body.links) < 20
and any(body.links, .href_url.domain.root_domain == "riddle.com")
and length(filter(body.links,
                  .href_url.domain.root_domain == "riddle.com"
                  and strings.istarts_with(.href_url.path, '/view/')
           )
) == 1
// 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_email().any_messages_benign
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