Open redirect: unitedwaynwvt.org

 1name: "Open redirect: unitedwaynwvt.org"
 2description: |
 3    Message contains use of the unitedwaynwvt.org open redirect. This has been exploited in the wild.
 4type: "rule"
 5severity: "medium"
 6source: |
 7  type.inbound
 8  and any(body.links,
 9          .href_url.domain.domain == "ebusiness.unitedwaynwvt.org"
10          and strings.icontains(.href_url.query_params, 'F=')
11          and not regex.icontains(.href_url.query_params,
12                                  'F=https?(?:%3a|:)(?:%2f|\/){2}(?:[^\/]+)?unitedwaynwvt.org(?:\&|\/|$|%2f)'
13          )
14  )
15  and not sender.email.domain.root_domain == "unitedwaynwvt.org"
16  // negate highly trusted sender domains unless they fail DMARC authentication
17  and not (
18    sender.email.domain.root_domain in $high_trust_sender_root_domains
19    and coalesce(headers.auth_summary.dmarc.pass, false)
20  )  
21attack_types:
22  - "Credential Phishing"
23  - "Malware/Ransomware"
24tactics_and_techniques:
25  - "Open redirect"
26detection_methods:
27  - "Sender analysis"
28  - "URL analysis"
29id: "da6eb27a-04c5-5604-bf16-25a74f26d10d"