Open Redirect: pmifunds.com

 1name: "Open Redirect: pmifunds.com"
 2description: |
 3    Message contains use of the pmifunds.com 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 == "trk.pmifunds.com"
10      and strings.icontains(.href_url.query_params, 'l=')
11      // not links where they redirect to pmifunds.com
12      and not regex.icontains(.href_url.query_params, 'l=[^&]*pmifunds\.com')
13  )
14  // remove uses that originate from pmifunds.com
15  and not any(headers.domains, .root_domain == "pmifunds.com")
16  
17  // negate highly trusted sender domains unless they fail DMARC authentication
18  and (
19    (
20      sender.email.domain.root_domain in $high_trust_sender_root_domains
21      and not headers.auth_summary.dmarc.pass
22    )
23    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
24  )  
25attack_types:
26  - "Credential Phishing"
27  - "Malware/Ransomware"
28tactics_and_techniques:
29  - "Open redirect"
30detection_methods:
31  - "Sender analysis"
32  - "URL analysis"
33id: "fdc91036-967e-57c4-b4cc-89a17b4cd742"