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 not (
20    sender.email.domain.root_domain in $high_trust_sender_root_domains
21    and coalesce(headers.auth_summary.dmarc.pass, false)
22  )
23  
24  // and no false positives and not solicited
25  and (
26    not profile.by_sender().any_messages_benign
27    and not profile.by_sender().solicited
28  )  
29attack_types:
30  - "Credential Phishing"
31tactics_and_techniques:
32  - "Impersonation: Brand"
33  - "Lookalike domain"
34  - "Social engineering"
35detection_methods:
36  - "Sender analysis"
37id: "0170dbf2-418f-5e12-a685-7cee3de33f2d"