• Sublime Core Feed
High Severity

Link: QR code with phishing disposition in img or pdf

Labels

Credential Phishing
QR code
Social engineering
Content analysis
Computer Vision
QR code analysis
Sender analysis
URL analysis

Description

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.

References

No references.

Sublime Security
Created Dec 6th, 2023 • Last updated Apr 14th, 2025
Feed Source
Sublime Core Feed
Source
GitHub
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().solicited
  or (
    profile.by_sender().any_messages_malicious_or_spam
    and not profile.by_sender().any_messages_benign
  )
  or (
    sender.email.domain.domain in $org_domains
    and not headers.auth_summary.dmarc.pass
  )
)

// 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 (
    // no messages from this sender email have been marked benign
    not profile.by_sender_email().any_messages_benign
    // or it's a spoof of the org_domain
    or (
        sender.email.domain.domain in $org_domains
        and not headers.auth_summary.dmarc.pass
    )
)
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