Medium Severity

Link: Single character path with credential theft body and self sender behavior or invalid recipient

Description

Message where the sender and recipient are the same or the recipient domain is invalid, contains a link with a single character path and no query parameters or fragments, and includes credential theft language.

References

No references.

Sublime Security
Created Apr 24th, 2026 • Last updated Apr 24th, 2026
Source
type.inbound
// self sender or invaild recipent domain
and length(recipients.to) == 1
and (
  sender.email.email == recipients.to[0].email.email
  or recipients.to[0].email.domain.valid == false
)
// path contains 1 character
and any(body.current_thread.links,
        regex.imatch(.href_url.path, '\/[A-Za-z0-9]')
        and .href_url.query_params is null
        and .href_url.fragment is null
        and .display_url.url is null
)
and any(ml.nlu_classifier(body.current_thread.text).intents,
        .name == "cred_theft" and .confidence != "low"
)
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