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 (
21    (
22      sender.email.domain.root_domain in $high_trust_sender_root_domains
23      and not headers.auth_summary.dmarc.pass
24    )
25    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
26  )  
27attack_types:
28  - "Credential Phishing"
29  - "Malware/Ransomware"
30tactics_and_techniques:
31  - "Open redirect"
32detection_methods:
33  - "Sender analysis"
34  - "URL analysis"
35id: "b790552a-b115-50f8-b1ed-9fb3731824df"