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    or regex.icontains(sender.display_name, 'w\x{206E}+i\x{206E}+x')
20    // Wix address from footer
21    or 2 of (
22      strings.icontains(body.current_thread.text, 'Wix.com'),
23      strings.icontains(body.current_thread.text, '100 Gansevoort St'),
24      strings.icontains(body.current_thread.text, 'New York, NY 10014')
25    )
26    or (
27      any(ml.nlu_classifier(body.current_thread.text).entities,
28          .name in ("sender", "org") and regex.icontains(.text, '^wix\b')
29      )
30      and any(ml.nlu_classifier(body.current_thread.text).intents,
31              .name == "cred_theft" and .confidence != "low"
32      )
33    )
34  )
35  and not (
36    (
37      sender.email.domain.root_domain in~ (
38        "wix.com",
39        "wixforms.com",
40        "wixemails.com",
41        "wixanswers.com",
42        "wix-groups.com",
43        "ascendbywix.com"
44      )
45      and headers.auth_summary.dmarc.pass
46    )
47  )
48  // negation for messages traversing wix.com
49  and not (
50    any(headers.domains, .root_domain in ("wix.com", "ascendbywix.com"))
51    and headers.auth_summary.spf.pass
52    and headers.auth_summary.dmarc.pass
53  )
54  and not profile.by_sender().solicited
55  // negate highly trusted sender domains unless they fail DMARC authentication
56  and (
57    (
58      sender.email.domain.root_domain in $high_trust_sender_root_domains
59      and not headers.auth_summary.dmarc.pass
60    )
61    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
62  )  
63
64attack_types:
65  - "Credential Phishing"
66tactics_and_techniques:
67  - "Impersonation: Brand"
68  - "Lookalike domain"
69  - "Social engineering"
70detection_methods:
71  - "Header analysis"
72  - "Sender analysis"
73id: "45e7b99f-94fc-5ae4-b5c9-ebfb59b04fe9"