Medium Severity

Link: Apple TestFlight from suspicious sender

Description

Detects messages containing Apple TestFlight links from free email providers or suspicious senders with no prior benign communication history.

References

No references.

Sublime Security
Created Oct 17th, 2025 • Last updated Apr 1st, 2026
Source
type.inbound
and any(body.links,
        .href_url.domain.domain in ('testflight.apple.com')
        or (
          .href_url.domain.root_domain == "mimecastprotect.com"
          and any(.href_url.query_params_decoded['domain'],
                  . in ("testflight.apple.com")
          )
        )
)
and not (
  (subject.is_forward or subject.is_reply)
  and (length(headers.references) != 0 or headers.in_reply_to is not null)
  and length(body.previous_threads) > 0
)
and (
  sender.email.domain.domain in $free_email_providers
  or beta.profile.by_reply_to().solicited == false
  or (
    beta.profile.by_reply_to().any_messages_malicious_or_spam
    and not beta.profile.by_reply_to().any_messages_benign
  )
)
MQL Rule Console
DocsLearning Labs

Playground

Test against your own EMLs or sample data.

Share

Post about this on your socials.

Get Started. Today.

Managed or self-managed. No MX changes.

Deploy and integrate a free Sublime instance in minutes.
Get Started