Sublime Security high experimental mql

Link: Credential theft with invisible Unicode character in page title from unsolicited sender

Detects messages containing credential theft language and links to pages with invisible Unicode characters in the title tag, a technique commonly used to evade detection in fraudulent pages.

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Detection Logic

type.inbound
// single recipient
and length(recipients.to) == 1
// valid recipient domain
and recipients.to[0].email.domain.valid
// between 1 and 14 links in the email
and 0 < length(body.links) < 15
// length of current thread is under 11k
and length(body.current_thread.text) < 11000
// tycoon captchas often have a page title with a specific unicode invisible char
and any(body.links,
        strings.contains(ml.link_analysis(., mode="aggressive").final_dom.raw,
                         "<title>\u{200B}</title>"
        )
        and length(ml.link_analysis(., mode="aggressive").final_dom.raw) < 10000
)
// unsolicited message
and not profile.by_sender().solicited

Field Validations

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