Open Redirect: magic4media.com

Message contains use of the magic4media.com open redirect. This has been exploited in the wild.

Sublime rule (View on GitHub)

 1name: "Open Redirect: magic4media.com"
 2description: |
 3    Message contains use of the magic4media.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 == "magic4media.com"
10      and strings.icontains(.href_url.query_params, 'r=')
11      and not strings.icontains(.href_url.query_params,
12                                'r=(?:https?(?:%3a|:))?(?:%2f|\/){2}[^&]*magic4media\.com(?:\&|\/|$)'
13      )
14  )
15  // remove uses that originate from magic4media.com
16  and not any(headers.domains, .root_domain == "magic4media.com")
17  // negate highly trusted sender domains unless they fail DMARC authentication
18  and (
19    (
20      sender.email.domain.root_domain in $high_trust_sender_root_domains
21      and not headers.auth_summary.dmarc.pass
22    )
23    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
24  )  
25attack_types:
26  - "Credential Phishing"
27  - "Malware/Ransomware"
28tactics_and_techniques:
29  - "Open redirect"
30detection_methods:
31  - "Sender analysis"
32  - "URL analysis"
33id: "942ebfa5-b119-554e-ac88-e5d91400e51a"
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