Open redirect: predictiveresponse.net

 1name: "Open redirect: predictiveresponse.net"
 2description: |
 3    Message contains use of the predictiveresponse.net 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.root_domain == "predictiveresponse.net"
10          and strings.icontains(.href_url.query_params, 'redirect=')
11          and not regex.icontains(.href_url.query_params,
12                                  'redirect=(?:https?(?:%3a|:))?(?:%2f|\/){2}[^&]*predictiveresponse\.net(?:\&|\/|$)'
13          )
14  )
15  and not sender.email.domain.root_domain == "predictiveresponse.net"
16  // negate use of predictiveresponse infra
17  and not any(headers.domains, .root_domain == "predictiveresponse.net")
18  and not any(headers.hops,
19              any(.fields,
20                  .name == "List-Unsubscribe"
21                  and strings.iends_with(.value, '@predictiveresponse.net>')
22              )
23  )
24  // negate highly trusted sender domains unless they fail DMARC authentication
25  and not (
26    sender.email.domain.root_domain in $high_trust_sender_root_domains
27    and coalesce(headers.auth_summary.dmarc.pass, false)
28  )  
29attack_types:
30  - "Credential Phishing"
31  - "Malware/Ransomware"
32tactics_and_techniques:
33  - "Open redirect"
34detection_methods:
35  - "Sender analysis"
36  - "URL analysis"
37id: "3474bb1b-8840-53b5-9582-3c9baf1b2d63"