Medium Severity

Attachment: Google share.google URL shortener in google.<tld>/share.google path form

Labels

Spam

Credential Phishing

Description

Detects inbound messages whose attachments contain links in the form google.<tld>/share.google?q=<code>, which inherits google.<tld> domain reputation to mask an attacker-controlled destination. This google.<tld>/share.google?q= path form is undocumented: Google publishes the share.google shortener feature, but not this on-Google-domain form or its 'q' parameter. ICS calendar attachments are covered by a separate rule.

References

No references.

Sublime Security

Created Sep 14th, 2026 • Last updated Sep 14th, 2026

Feed Source

Sublime Core Feed

Source

GitHub

type.inbound
and any(attachments,
        not (
          .file_type == "ics"
          or .file_extension == "ics"
          or .content_type in ("application/ics", "text/calendar")
        )
        and any(file.explode(.),
                any(.scan.url.urls,
                    .domain.sld == "google"
                    and strings.istarts_with(.path, '/share.google')
                    and 'q' in keys(.query_params_decoded)
                )
        )
)

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