Open redirect: Artisteer

calendar May 23, 2025  ยท
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Message contains use of the Artisteer open redirect, but the sender is not Artisteer. This has been exploited in the wild.

Sublime rule (View on GitHub)

 1name: "Open redirect: Artisteer"
 2description: "Message contains use of the Artisteer open redirect, but the sender is not Artisteer. This has been exploited in the wild."
 3type: "rule"
 4severity: "medium"
 5source: |
 6  type.inbound
 7  and any(body.links,
 8          .href_url.domain.root_domain == 'artisteer.com'
 9          and strings.icontains(.href_url.query_params, 'redirect_url=')
10          and strings.icontains(.href_url.query_params, 'p=affr')
11  )
12  and sender.email.domain.root_domain != 'artisteer.com'
13  
14  // negate highly trusted sender domains unless they fail DMARC authentication
15  and (
16    (
17      sender.email.domain.root_domain in $high_trust_sender_root_domains
18      and not headers.auth_summary.dmarc.pass
19    )
20    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
21  )  
22attack_types:
23  - "Credential Phishing"
24tactics_and_techniques:
25  - "Open redirect"
26detection_methods:
27  - "Sender analysis"
28  - "URL analysis"
29id: "1f65eec3-4162-5f56-b66a-09a54204f80b"
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