Open redirect: weblinkconnect.com

 1name: "Open redirect: weblinkconnect.com"
 2description: "Message contains use of the weblinkconnect.com open redirect, but the sender is not weblinkconnect.com. This has been exploited in the wild."
 3type: "rule"
 4severity: "medium"
 5source: |
 6  type.inbound
 7  and any(body.links,
 8          .href_url.domain.domain == 'api-internal.weblinkconnect.com'
 9          and strings.icontains(.href_url.path, "/click")
10          and strings.icontains(.href_url.query_params, "url=")
11  )
12  and sender.email.domain.root_domain != 'weblinkconnect.com'
13  and not any(headers.domains, .root_domain == "weblinkinternational.com")
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  - "Evasion"
26  - "Open redirect"
27detection_methods:
28  - "Sender analysis"
29  - "URL analysis"
30id: "967f7a11-d2f0-51ff-a2c4-02ffcc40ebb2"