Low Severity

Service abuse: Evernote link

Labels

Description

Detects inbound messages containing a link whose effective destination resolves to evernote.com, where the link text uses document-sharing or e-signature language (e.g., view, open, download, review) and the sender is not from evernote.com. The message body is also classified by an NLU model as exhibiting credential theft or business email compromise intent, indicating abuse of Evernote's legitimate hosting infrastructure to deliver malicious content.

References

No references.

Sublime Security

Created Aug 5th, 2026 • Last updated Aug 5th, 2026

Feed Source

Sublime Core Feed

Source

GitHub

type.inbound
// a link whose effective destination is evernote
and any(body.current_thread.links,
        (
          .href_url.domain.root_domain == "evernote.com"
          or .display_url.domain.root_domain == "evernote.com"
          or any(.href_url.query_params_decoded["domain"],
                 strings.iends_with(., "evernote.com")
          )
        )
        and (
          any(ml.nlu_classifier(.display_text).topics, .name == 'E-Signature')
          or regex.icontains(.display_text,
                             '\b(?:view|open|review|access|download|see|shared?)\b[^\n]{0,30}\b(?:document|doc|file|contract|invoice|statement|agreement|draft|attachment|folder)\b'
          )
        )
)
and any(ml.nlu_classifier(body.current_thread.text).intents,
        .name in ('cred_theft', 'bec') and .confidence != 'low'
)
and not (
  sender.email.domain.root_domain == 'evernote.com'
  and coalesce(headers.auth_summary.dmarc.pass, false)
)

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