Medium Severity
Attachment: Small text file with link containing recipient email address
Description
Attach text file is less than 1000 bytes and contains a recipients email address. Seen in the wild carrying credential phishing links.
References
No references.
Sublime Security
Created May 14th, 2024 • Last updated Oct 23rd, 2024
Feed Source
Sublime Core Feed
Source
type.inbound
and any(attachments,
.content_type in~ ("text/plain", "text")
// negate calendar invites
and not (
.file_extension == "ics"
or .content_type in ("application/ics", "text/calendar")
)
and any(file.explode(.),
.size < 1000
and any(.scan.url.urls,
any(recipients.to,
strings.icontains(..url, .email.email)
and .email.domain.valid
)
)
)
)
and (
not profile.by_sender().solicited
or (
profile.by_sender().any_messages_malicious_or_spam
and not profile.by_sender().any_false_positives
)
)
Playground
Test against your own EMLs or sample data.