Open redirect: bangkoksync.com

 1name: "Open redirect: bangkoksync.com"
 2description: |
 3    Message contains use of the bangkoksync.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 == "bangkoksync.com"
10          and strings.icontains(.href_url.path, '/goto.php')
11          and regex.icontains(.href_url.query_params,
12                              'url=(?:https?|(?:\/|%2f)(?:\/|%2f))'
13          )
14          and any(.href_url.query_params_decoded["url"],
15                  strings.parse_url(.).domain.root_domain != "bangkoksync.com"
16          )
17  )
18  and not sender.email.domain.root_domain == "bangkoksync.com"
19  
20  // negate highly trusted sender domains unless they fail DMARC authentication
21  and not (
22    sender.email.domain.root_domain in $high_trust_sender_root_domains
23    and coalesce(headers.auth_summary.dmarc.pass, false)
24  )  
25attack_types:
26  - "Credential Phishing"
27  - "Malware/Ransomware"
28tactics_and_techniques:
29  - "Open redirect"
30detection_methods:
31  - "Sender analysis"
32  - "URL analysis"
33id: "e1449ccd-566e-5218-8bfe-269afc4182e7"