Open redirect: retailrocket.net

 1name: "Open redirect: retailrocket.net"
 2description: |
 3    Message contains use of the retailrocket.net open redirect. This has been exploited in the wild.
 4type: "rule"
 5severity: "medium"
 6source: |
 7  type.inbound
 8  and length(filter(body.links,
 9                    .href_url.domain.root_domain == "retailrocket.net"
10             )
11  ) < 10
12  and any(body.links,
13          .href_url.domain.domain == "clickproxy.retailrocket.net"
14          and strings.icontains(.href_url.query_params, 'url=')
15          and not regex.icontains(.href_url.query_params,
16                                  'url=(?:https?(?:%3a|:))?(?:%2f|\/){2}[^&]*retailrocket\.net(?:\&|\/|$)'
17          )
18  )
19  and not sender.email.domain.root_domain == "retailrocket.net"
20  // negate highly trusted sender domains unless they fail DMARC authentication
21  and not (
22    sender.email.domain.root_domain in $high_trust_sender_root_domains
23    and coalesce(headers.auth_summary.dmarc.pass, false)
24  )  
25attack_types:
26  - "Credential Phishing"
27  - "Malware/Ransomware"
28tactics_and_techniques:
29  - "Open redirect"
30detection_methods:
31  - "Sender analysis"
32  - "URL analysis"
33id: "0e00e7cb-6761-5cc2-befb-76c5725630c1"