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Description

DocuSign shares with new reply-to addresses have been seen in recent attacks.

References

No references.

Sublime Security
Created Oct 1st, 2024 • Last updated Aug 5th, 2025
Source
type.inbound

// message is from docusign actual
and sender.email.domain.root_domain == 'docusign.net'
and (headers.auth_summary.spf.pass or headers.auth_summary.dmarc.pass)

// 
// This rule makes use of a beta feature and is subject to change without notice
// using the beta feature in custom rules is not suggested until it has been formally released
// 

// reply-to email address has never been sent an email by the org
and not beta.profile.by_reply_to().solicited

// new reply-to
and any(headers.reply_to, network.whois(.email.domain).days_old < 30)

// not a completed DocuSign
and not strings.istarts_with(subject.subject, "Completed:")
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