Open Redirect: eaoko.org

 1name: "Open Redirect: eaoko.org"
 2description: |
 3    Message contains use of the eaoko.org 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 == "eaoko.org"
10          and strings.icontains(.href_url.query_params, 'goto=')
11          and not regex.icontains(.href_url.query_params,
12                                    'url=(?:https?(?:%3a|:))?(?:%2f|\/){2}[^&]*eaoko\.org(?:\&|\/|$|%2f)'
13          )
14  )
15  and not sender.email.domain.root_domain == "eaoko.org"
16  // negate highly trusted sender domains unless they fail DMARC authentication
17  and (
18    (
19      sender.email.domain.root_domain in $high_trust_sender_root_domains
20      and not headers.auth_summary.dmarc.pass
21    )
22    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
23  )  
24attack_types:
25  - "Credential Phishing"
26  - "Malware/Ransomware"
27tactics_and_techniques:
28  - "Open redirect"
29detection_methods:
30  - "Sender analysis"
31  - "URL analysis"
32id: "f8fd9912-7ee2-5f04-8fcb-af635b9990b2"