Brand impersonation: Wix

 1name: "Brand impersonation: Wix"
 2description: "Detects messages impersonating Wix by using similar display names or domain names, while not originating from legitimate WIX domains or failing DMARC authentication from trusted senders."
 3type: "rule"
 4severity: "medium"
 5source: |
 6  type.inbound
 7  and (
 8    (
 9      regex.icontains(sender.display_name, '^WIX\b')
10      or strings.ilike(sender.email.domain.domain, 'WIX')
11    )
12    or (
13      strings.icontains(sender.display_name, 'wix')
14      and regex.icontains(body.current_thread.text,
15                          "Domain Expir(?:ation|y) Not(?:ice|ification)"
16      )
17      and strings.icontains(body.current_thread.text, "will be deactivated")
18    )
19    // Wix address from footer
20    or 2 of (
21      strings.icontains(body.current_thread.text, 'Wix.com'),
22      strings.icontains(body.current_thread.text, '100 Gansevoort St'),
23      strings.icontains(body.current_thread.text, 'New York, NY 10014')
24    )
25    or (
26      any(ml.nlu_classifier(body.current_thread.text).entities,
27          .name in ("sender", "org") and regex.icontains(.text, '^wix\b')
28      )
29      and any(ml.nlu_classifier(body.current_thread.text).intents,
30              .name == "cred_theft" and .confidence != "low"
31      )
32    )
33  )
34  and not (
35    (
36      sender.email.domain.root_domain in~ (
37        "wix.com",
38        "wixforms.com",
39        "wixemails.com",
40        "wixanswers.com",
41        "wix-groups.com",
42        "ascendbywix.com"
43      )
44      and headers.auth_summary.dmarc.pass
45    )
46  )
47  // negation for messages traversing wix.com
48  and not (
49    any(headers.domains, .root_domain in ("wix.com", "ascendbywix.com"))
50    and headers.auth_summary.spf.pass
51    and headers.auth_summary.dmarc.pass
52  )
53  and not profile.by_sender().solicited
54  // negate highly trusted sender domains unless they fail DMARC authentication
55  and (
56    (
57      sender.email.domain.root_domain in $high_trust_sender_root_domains
58      and not headers.auth_summary.dmarc.pass
59    )
60    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
61  )  
62
63attack_types:
64  - "Credential Phishing"
65tactics_and_techniques:
66  - "Impersonation: Brand"
67  - "Lookalike domain"
68  - "Social engineering"
69detection_methods:
70  - "Header analysis"
71  - "Sender analysis"
72id: "45e7b99f-94fc-5ae4-b5c9-ebfb59b04fe9"