• Sublime Core Feed
Medium Severity

Open redirect: buildingengines.com

Description

Detects messages containing buildingengines.com redirect links that use the _redirectTo parameter to redirect users to malicious sites. This has been observed in phishing campaigns.

References

No references.

Sublime Security
Created Mar 18th, 2025 • Last updated Jan 12th, 2026
Source
type.inbound
and any(body.links,
        // Look for buildingengines URLs
        .href_url.domain.domain == "app.buildingengines.com"
        and strings.icontains(.href_url.query_params, '_redirectTo=')
        // Make sure it's not redirecting back to buildingengines.com
        and not regex.icontains(.href_url.query_params,
                                '_redirectTo=(?:https?(?:%3a|:))?(?:%2f|\/){2}[^&]*buildingengines\.com(?:\&|\/|$|%2f)'
        )
)
// Exclude legitimate Building Engines domains as senders
and not sender.email.domain.root_domain == "buildingengines.com"

// negate highly trusted sender domains unless they fail DMARC authentication
and (
  (
    sender.email.domain.root_domain in $high_trust_sender_root_domains
    and not headers.auth_summary.dmarc.pass
  )
  or sender.email.domain.root_domain not in $high_trust_sender_root_domains
)
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