Open redirect: Artisteer

 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  and (
14    not profile.by_sender().solicited
15    or (
16      profile.by_sender().any_messages_malicious_or_spam
17      and not profile.by_sender().any_false_positives
18    )
19  )
20  
21  // negate highly trusted sender domains unless they fail DMARC authentication
22  and (
23    (
24      sender.email.domain.root_domain in $high_trust_sender_root_domains
25      and not headers.auth_summary.dmarc.pass
26    )
27    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
28  )  
29attack_types:
30  - "Credential Phishing"
31tactics_and_techniques:
32  - "Open redirect"
33detection_methods:
34  - "Sender analysis"
35  - "URL analysis"
36id: "1f65eec3-4162-5f56-b66a-09a54204f80b"