Open redirect: qrxtech.com

 1name: "Open redirect: qrxtech.com"
 2description: |
 3    Message contains use of the qrxtech.com 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 == "qrxtech.com"
10          and strings.iends_with(.href_url.path, 'XMLServer.aspx')
11          and strings.icontains(.href_url.query_params, 'HREF=')
12          and strings.icontains(.href_url.query_params, 'FUNC=')
13          and not strings.icontains(.href_url.query_params,
14                                    'HREF=(?:https?(?:%3a|:))?(?:%2f|\/){2}[^&]*qrxtech\.com(?:\&|\/|$)'
15          )
16  )
17  // remove uses that originate from qrxtech.com
18  and not any(headers.domains, .root_domain == "qrxtech.com")
19  // negate highly trusted sender domains unless they fail DMARC authentication
20  and not (
21    sender.email.domain.root_domain in $high_trust_sender_root_domains
22    and coalesce(headers.auth_summary.dmarc.pass, false)
23  )  
24attack_types:
25  - "Credential Phishing"
26  - "Malware/Ransomware"
27tactics_and_techniques:
28  - "Open redirect"
29detection_methods:
30  - "Sender analysis"
31  - "URL analysis"
32id: "b790552a-b115-50f8-b1ed-9fb3731824df"