Sublime Security medium experimental mql

File sharing link from suspicious sender domain

A file sharing link in the body sent from a suspicious sender domain.

View Source

Detection Logic

type.inbound
and any(body.links,
        (
          .href_url.domain.domain in $free_file_hosts
          or .href_url.domain.root_domain in $free_file_hosts
        )
        and not .href_url.domain.domain in $tenant_domains
        // remove free_file_hosts used to host images as links
        and not any($file_types_images,
                    strings.iends_with(..href_url.url, strings.concat('.', .))
        )
)
and sender.email.domain.tld in $suspicious_tlds
and not sender.email.domain.root_domain in ("notion.so", "cribl.cloud")
and (
  not profile.by_sender().solicited
  or (
    profile.by_sender().any_messages_malicious_or_spam
    and not profile.by_sender().any_messages_benign
  )
)

Field Validations

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