Sublime Security medium experimental mql

Brand impersonation: Venmo

Impersonation of Venmo

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Detection Logic

type.inbound
and (
  strings.ilike(sender.display_name, '*venmo*')
  or strings.ilevenshtein(sender.display_name, 'venmo') <= 1
)
and sender.email.domain.root_domain not in~ (
  'venmo.com',
  'synchronybank.com',
  'venmocreditsurvey.com',
  'venmo-experience.com',
  'synchrony.com'
)

// and not if the sender.display.name contains "via" and dmarc pass from venmo.com
and not (
  (
    headers.auth_summary.dmarc.pass
    and headers.auth_summary.dmarc.details.from.root_domain == "venmo.com"
  )
  and strings.contains(sender.display_name, "via")
)

// 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 false positives and not solicited
and (
  not profile.by_sender().any_messages_benign
  and not profile.by_sender().solicited
)

Field Validations

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