Sublime Security high experimental mql

Link: QR code with phishing disposition in img or pdf

This rule analyzes image attachments for QR Codes in which LinkAnalysis concludes is phishing. The rule ensures that the URLs do not link to any organizational domains.

View Source

Detection Logic

type.inbound
and length(attachments) < 10
and any(attachments,
        (.file_type in $file_types_images or .file_type == "pdf")
        and any(file.explode(.),
                .scan.qr.type == "url"

                // linkanalysis phishing disposition
                and any([ml.link_analysis(.scan.qr.url)],
                        .credphish.disposition == "phishing"
                )
                and .scan.qr.url.domain.root_domain not in $org_domains
        )
)
and (
  not profile.by_sender_email().solicited
  or not profile.by_sender_email().any_messages_benign
  or (
    profile.by_sender_email().any_messages_malicious_or_spam
    and not profile.by_sender_email().any_messages_benign
  )
  or (
    sender.email.domain.domain in $org_domains
    and not coalesce(headers.auth_summary.dmarc.pass, false)
  )
)

// 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
)

Field Validations

Loading…

Comments (0)

Loading comments...