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Description

Detects callback scams sent through legitimate Zoom infrastructure that impersonate well-known brands like McAfee, Norton, or PayPal. These messages contain purchase or support-related language along with phone numbers, attempting to trick recipients into calling fraudulent support lines.

References

No references.

Sublime Security
Created Aug 5th, 2025 • Last updated Sep 22nd, 2025
Source
type.inbound
and length(attachments) == 0

// Legitimate Zoom sending infratructure
and sender.email.domain.root_domain == 'zoom.us'
and (headers.auth_summary.spf.pass or headers.auth_summary.dmarc.pass)

// Zoom Logo 
and any(ml.logo_detect(file.message_screenshot()).brands, .name == "Zoom")

// Callback Phishing
and regex.icontains(body.current_thread.text,
                    (
                      "mcafee|n[o0]rt[o0]n|geek.{0,5}squad|paypal|ebay|symantec|best buy|lifel[o0]ck"
                    )
)
and 3 of (
  strings.ilike(body.current_thread.text, '*purchase*'),
  strings.ilike(body.current_thread.text, '*payment*'),
  strings.ilike(body.current_thread.text, '*transaction*'),
  strings.ilike(body.current_thread.text, '*subscription*'),
  strings.ilike(body.current_thread.text, '*antivirus*'),
  strings.ilike(body.current_thread.text, '*order*'),
  strings.ilike(body.current_thread.text, '*support*'),
  strings.ilike(body.current_thread.text, '*help line*'),
  strings.ilike(body.current_thread.text, '*receipt*'),
  strings.ilike(body.current_thread.text, '*invoice*'),
  strings.ilike(body.current_thread.text, '*call*'),
  strings.ilike(body.current_thread.text, '*cancel*'),
  strings.ilike(body.current_thread.text, '*renew*'),
  strings.ilike(body.current_thread.text, '*refund*')
)
// phone number regex
and any([body.current_thread.text, subject.subject],
        regex.icontains(.,
                        '\+?([ilo0-9]{1}.)?\(?[ilo0-9]{3}?\)?.[ilo0-9]{3}.?[ilo0-9]{4}',
                        '\+?([ilo0-9]{1,2})?\s?\(?\d{3}\)?[\s\.\-⋅]{0,5}[ilo0-9]{3}[\s\.\-⋅]{0,5}[ilo0-9]{4}'
        )
)
// negation for legitimate AI generated meeting summaries from Zoom 
and not (
  (
    sender.display_name == "Meeting Summary with AI Companion"
    and sender.email.email == "no-reply@zoom.us"
    and headers.auth_summary.dmarc.pass
  )
  or (
    strings.icontains(subject.subject, "Meeting assets")
    and strings.icontains(body.current_thread.text, "Meeting summary")
    and sender.email.email == "no-reply@zoom.us"
    and headers.auth_summary.dmarc.pass
  )
)
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