• Sublime Core Feed
Medium Severity

Open Redirect: labcluster.com

Labels

Credential Phishing
Malware/Ransomware
Open redirect
Sender analysis
URL analysis

Description

Message contains use of the cm.labcluster.com/go.aspx redirect. This has been exploited in the wild for phishing.

References

No references.

Sublime Security
Created Mar 20th, 2025 • Last updated Mar 20th, 2025
Feed Source
Sublime Core Feed
Source
GitHub
type.inbound
and any(body.links,
        .href_url.domain.domain == "cm.labcluster.com"
        and strings.icontains(.href_url.path, '/go.aspx')
        and strings.icontains(.href_url.query_params, 'url=')
        and not regex.icontains(.href_url.query_params,
                              'url=(?:https?(?:%3a|:))?(?:%2f|\/){2}[^&]*labcluster\.com(?:\&|\/|$|%2f)'
        )
)
and not sender.email.domain.root_domain == "labcluster.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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