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.imatch(strings.replace_confusables(sender.display_name),
10                   'w[i1|]x\b.*'
11      )
12      or strings.ilike(sender.email.domain.domain, 'WIX')
13    )
14    or (
15      strings.icontains(sender.display_name, 'wix')
16      and regex.icontains(body.current_thread.text,
17                          "Domain Expir(?:ation|y) Not(?:ice|ification)"
18      )
19      and strings.icontains(body.current_thread.text, "will be deactivated")
20    )
21    or regex.icontains(sender.display_name, 'w\x{206E}+i\x{206E}+x')
22    // Wix address from footer
23    or 2 of (
24      strings.icontains(body.current_thread.text, 'Wix.com'),
25      strings.icontains(body.current_thread.text, '100 Gansevoort St'),
26      strings.icontains(body.current_thread.text, 'New York, NY 10014')
27    )
28    or (
29      any(ml.nlu_classifier(body.current_thread.text).entities,
30          .name in ("sender", "org")
31          and (
32            regex.imatch(.text, 'wix\b.*') or strings.icontains(.text, 'wix team')
33          )
34      )
35      and any(ml.nlu_classifier(body.current_thread.text).intents,
36              .name == "cred_theft" and .confidence != "low"
37      )
38    )
39  )
40  and not (
41    (
42      sender.email.domain.root_domain in~ (
43        "wix.com",
44        "wixforms.com",
45        "wixemails.com",
46        "wixanswers.com",
47        "wix-groups.com",
48        "ascendbywix.com"
49      )
50      and headers.auth_summary.dmarc.pass
51    )
52  )
53  // negation for messages traversing wix.com
54  and not (
55    any(headers.domains, .root_domain in ("wix.com", "ascendbywix.com"))
56    and headers.auth_summary.spf.pass
57    and headers.auth_summary.dmarc.pass
58  )
59  and not profile.by_sender().solicited
60  // negate highly trusted sender domains unless they fail DMARC authentication
61  and not (
62    sender.email.domain.root_domain in $high_trust_sender_root_domains
63    and coalesce(headers.auth_summary.dmarc.pass, false)
64  )  
65
66attack_types:
67  - "Credential Phishing"
68tactics_and_techniques:
69  - "Impersonation: Brand"
70  - "Lookalike domain"
71  - "Social engineering"
72detection_methods:
73  - "Header analysis"
74  - "Sender analysis"
75id: "45e7b99f-94fc-5ae4-b5c9-ebfb59b04fe9"