Brand impersonation: Sublime Security
Possible attempt to impersonate Sublime Security executives.
Sublime rule (View on GitHub)
1name: "Brand impersonation: Sublime Security"
2description: |
3 Possible attempt to impersonate Sublime Security executives.
4references:
5 - "https://sandbox.sublimesecurity.com?id=612ff73b-e22d-4176-9e22-2b841b60a237"
6type: "rule"
7severity: "high"
8source: |
9 type.inbound
10 and (
11 sender.display_name in~ ('Sublime Security', 'Josh Kamdjou', 'Joshua Kamdjou', 'Ian Thiel')
12 or strings.ilevenshtein(sender.email.domain.domain, 'sublimesecurity.com') <= 2
13 )
14 and sender.email.domain.domain != 'sublimesecurity.com'
15 and (
16 profile.by_sender().prevalence in ("new", "outlier")
17 or (
18 profile.by_sender().any_messages_malicious_or_spam
19 and not profile.by_sender().any_false_positives
20 )
21 )
22
23 // negate highly trusted sender domains unless they fail DMARC authentication
24 and (
25 (
26 sender.email.domain.root_domain in $high_trust_sender_root_domains
27 and not headers.auth_summary.dmarc.pass
28 )
29 or sender.email.domain.root_domain not in $high_trust_sender_root_domains
30 )
31attack_types:
32 - "Credential Phishing"
33tactics_and_techniques:
34 - "Impersonation: Brand"
35 - "Lookalike domain"
36 - "Social engineering"
37detection_methods:
38 - "Sender analysis"
39id: "949484ed-c774-5f53-b91f-cd02ee6104f9"