Open Redirect: Bitrix24 URL Path

calendar Mar 18, 2025  ยท
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Message contains use of the Bitrix24 redirect. This has been exploited in the wild for phishing.

Sublime rule (View on GitHub)

 1name: "Open Redirect: Bitrix24 URL Path"
 2description: |
 3    Message contains use of the Bitrix24 redirect. This has been exploited in the wild for phishing.
 4type: "rule"
 5severity: "medium"
 6source: |
 7  type.inbound
 8  and any(body.links,
 9          strings.istarts_with(.href_url.path, '/bitrix/')
10          and strings.iends_with(.href_url.path, '.php')
11          and strings.icontains(.href_url.query_params, 'goto=')
12  )
13  
14  // negate highly trusted sender domains unless they fail DMARC authentication
15  and (
16    (
17      sender.email.domain.root_domain in $high_trust_sender_root_domains
18      and not headers.auth_summary.dmarc.pass
19    )
20    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
21  )  
22attack_types:
23  - "Credential Phishing"
24tactics_and_techniques:
25  - "Open redirect"
26detection_methods:
27  - "Sender analysis"
28  - "URL analysis"
29id: "e3c85e59-74c2-5f8f-b1c2-41d3950f72e0"
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