Open Redirect: TikTok

 1name: "Open Redirect: TikTok"
 2description: |
 3    Message contains use of an open redirect on TikTok. 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 == "tiktok.com"
10      and strings.icontains(.href_url.query_params, 'target=')
11      and strings.icontains(.href_url.query_params, 'aid=')
12  )
13  // attempt to remove any FPs sent by TikTok actual
14  and not (
15    sender.email.domain.root_domain in ("tiktok.com")
16    and headers.auth_summary.dmarc.pass
17  )
18  
19  and (
20    not profile.by_sender().solicited
21    or (
22      profile.by_sender().any_messages_malicious_or_spam
23      and not profile.by_sender().any_false_positives
24    )
25  )
26  
27  // negate highly trusted sender domains unless they fail DMARC authentication
28  and (
29    (
30      sender.email.domain.root_domain in $high_trust_sender_root_domains
31      and not headers.auth_summary.dmarc.pass
32    )
33    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
34  )  
35attack_types:
36  - "Credential Phishing"
37  - "Malware/Ransomware"
38tactics_and_techniques:
39  - "Open redirect"
40detection_methods:
41  - "Sender analysis"
42  - "URL analysis"
43id: "d231d135-956c-5e6d-babe-71f847d29d1d"