Sublime Security medium experimental mql

Brand Impersonation: Gemini Trust Company

Detects messages impersonating Gemini Trust Company through analysis of footer content, social media links, and address verification, excluding legitimate communications from authenticated Gemini domains.

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Detection Logic

type.inbound
and (
  // the address in the footer
  (
    regex.icontains(body.current_thread.text,
                    "600 Third Avenue.{1,2}2nd Floor.{1,2}New York, NY"
    )
    and strings.icontains(body.current_thread.text, "Gemini Trust Company")
  )
  // logo detect combined with sender display name 
  // need to be more specific here due to other uses of the word "Gemini"
  or (
    sender.display_name =~ "Gemini"
    and any(ml.logo_detect(file.message_screenshot()).brands,
            .name == "Gemini Trust" and .confidence != "low"
    )
  )
  // copyright footer
  or strings.icontains(body.current_thread.text,
                       '© 2025 Gemini Trust Company, LLC'
  )

  // the social links in the footer
  or (
    length(filter(body.links,
                  strings.icontains(.href_url.url,
                                    'https://www.instagram.com/gemini/'
                  )
                  or strings.icontains(.href_url.url,
                                       'https://www.linkedin.com/company/geminitrust/'
                  )
                  or strings.icontains(.href_url.url,
                                       'https://facebook.com/GeminiTrust'
                  )
                  or strings.icontains(.href_url.url,
                                       'https://twitter.com/Gemini'
                  )
                  or strings.icontains(.href_url.url,
                                       'https://support.gemini.com/hc/en-us/requests/new'
                  )
                  or strings.icontains(.href_url.url,
                                       'https://support.gemini.com/hc/en-us/requests/new'
                  )
           )
    ) >= 4
  )
)
// not forwards/replies
and not (
  length(headers.references) > 0
  and (subject.is_forward or subject.is_reply)
  and length(body.previous_threads) >= 1
)
// not from Gemini actual
and not (
  sender.email.domain.root_domain in (
    "gemini.com",
    "niftygateway.com" // NFT market place owned by Gemini Trust Company
  )
  and headers.auth_summary.dmarc.pass
)

Field Validations

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