Brand impersonation: Fastway

 1name: "Brand impersonation: Fastway"
 2description: |
 3    Impersonation of Fastway Couriers, a delivery services company in Ireland and South Africa.
 4type: "rule"
 5severity: "medium"
 6source: |
 7  type.inbound
 8  and (
 9    strings.ilike(sender.display_name, '*fastway*')
10    or strings.ilevenshtein(sender.display_name, 'fastway couriers') <= 1
11  )
12  and sender.email.domain.root_domain not in~ (
13    'fastway.co.za',
14    'fastway.com.au',
15    'fastway.ie'
16  )
17  
18  // negate highly trusted sender domains unless they fail DMARC authentication
19  and (
20    (
21      sender.email.domain.root_domain in $high_trust_sender_root_domains
22      and not headers.auth_summary.dmarc.pass
23    )
24    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
25  )
26  
27  // and no false positives and not solicited
28  and (
29    not profile.by_sender().any_messages_benign
30    and not profile.by_sender().solicited
31  )  
32attack_types:
33  - "Credential Phishing"
34tactics_and_techniques:
35  - "Impersonation: Brand"
36  - "Lookalike domain"
37  - "Social engineering"
38detection_methods:
39  - "Sender analysis"
40id: "0170dbf2-418f-5e12-a685-7cee3de33f2d"