Open redirect: stats.lib.pdx.edu

 1name: "Open redirect: stats.lib.pdx.edu"
 2description: |
 3    Message contains use of the stats.lib.pdx.edu 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 == "stats.lib.pdx.edu"
10            and strings.icontains(.href_url.path, "/proxy.php")
11            and strings.icontains(.href_url.query_params, 'url=')
12            // negate use of the redirect by stats.lib.pdx.edu
13            and not regex.icontains(.href_url.query_params, 'url=[^&]*stats\.lib\.pdx\.edu')
14    ) 
15  
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: "0fe96183-7eb9-590d-8c77-a1075de5b2ba"