Brand impersonation: Dashlane

Impersonation of the password management software Dashlane.

Sublime rule (View on GitHub)

 1name: "Brand impersonation: Dashlane"
 2description: "Impersonation of the password management software Dashlane."
 3type: "rule"
 4severity: "medium"
 5source: |
 6  type.inbound
 7  and (
 8    regex.icontains(sender.display_name, '\bDashlane\b')
 9    or strings.ilike(sender.email.domain.domain, '*Dashlane*')
10  )
11  and sender.email.domain.root_domain not in~ ('dashlane.com')
12  and (
13    profile.by_sender().prevalence in ("new", "outlier")
14    or (
15      profile.by_sender().any_messages_malicious_or_spam
16      and not profile.by_sender().any_false_positives
17    )
18  )
19  
20  // negate highly trusted sender domains unless they fail DMARC authentication
21  and (
22    (
23      sender.email.domain.root_domain in $high_trust_sender_root_domains
24      and (
25        any(distinct(headers.hops, .authentication_results.dmarc is not null),
26            strings.ilike(.authentication_results.dmarc, "*fail")
27        )
28      )
29    )
30    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
31  )  
32
33attack_types:
34  - "Credential Phishing"
35tactics_and_techniques:
36  - "Impersonation: Brand"
37  - "Social engineering"
38detection_methods:
39  - "Header analysis"
40  - "Sender analysis"
41id: "9e400937-4e7e-53fe-ad34-8393ab01890e"
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