Brand impersonation: Dotloop

Impersonation of Dotloop, a real estate transaction management platform.

Sublime rule (View on GitHub)

 1name: "Brand impersonation: Dotloop"
 2description: "Impersonation of Dotloop, a real estate transaction management platform."
 3type: "rule"
 4severity: "medium"
 5source: |
 6  type.inbound
 7  and (
 8    strings.ilike(sender.display_name, '*dotloop*')
 9    or strings.ilike(sender.email.domain.domain, '*dotloop*')
10  )
11  and sender.email.domain.root_domain not in~ ('dotloop.com', 'showingtime.com')
12  and (
13    (
14      profile.by_sender().prevalence in ("new", "outlier")
15      and not profile.by_sender().solicited
16    )
17    or profile.by_sender().any_messages_malicious_or_spam
18  )
19  and not profile.by_sender().any_false_positives
20  
21  // negate highly trusted sender domains unless they fail DMARC authentication
22  and (
23    (
24      sender.email.domain.root_domain in $high_trust_sender_root_domains
25      and (
26        any(distinct(headers.hops, .authentication_results.dmarc is not null),
27            strings.ilike(.authentication_results.dmarc, "*fail")
28        )
29      )
30    )
31    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
32  )  
33attack_types:
34  - "Credential Phishing"
35tactics_and_techniques:
36  - "Impersonation: Brand"
37  - "Social engineering"
38detection_methods:
39  - "Header analysis"
40  - "Sender analysis"
41id: "f997581a-ca08-5b21-8a52-ee0ca78fcea5"
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