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.*')
33            or regex.icontains(.text, 'w[il]x.?team')
34          )
35      )
36      and any(ml.nlu_classifier(body.current_thread.text).intents,
37              .name == "cred_theft" and .confidence != "low"
38      )
39    )
40  )
41  and not (
42    (
43      sender.email.domain.root_domain in~ (
44        "wix.com",
45        "wixforms.com",
46        "wixemails.com",
47        "wixanswers.com",
48        "wix-groups.com",
49        "ascendbywix.com"
50      )
51      and headers.auth_summary.dmarc.pass
52    )
53  )
54  // negation for messages traversing wix.com
55  and not (
56    any(headers.domains, .root_domain in ("wix.com", "ascendbywix.com"))
57    and headers.auth_summary.spf.pass
58    and headers.auth_summary.dmarc.pass
59  )
60  and not profile.by_sender().solicited
61  // negate highly trusted sender domains unless they fail DMARC authentication
62  and not (
63    sender.email.domain.root_domain in $high_trust_sender_root_domains
64    and coalesce(headers.auth_summary.dmarc.pass, false)
65  )  
66
67attack_types:
68  - "Credential Phishing"
69tactics_and_techniques:
70  - "Impersonation: Brand"
71  - "Lookalike domain"
72  - "Social engineering"
73detection_methods:
74  - "Header analysis"
75  - "Sender analysis"
76id: "45e7b99f-94fc-5ae4-b5c9-ebfb59b04fe9"