sublimemediumRule

Brand impersonation: Fastway

Impersonation of Fastway Couriers, a delivery services company in Ireland and South Africa.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598 T1598.003 T1583.001

initial-access

Detection Query

type.inbound
and (
  strings.ilike(sender.display_name, '*fastway*')
  or strings.ilevenshtein(sender.display_name, 'fastway couriers') <= 1
)
and sender.email.domain.root_domain not in~ (
  'fastway.co.za',
  'fastway.com.au',
  'fastway.ie'
)

// negate highly trusted sender domains unless they fail DMARC authentication
and (
  (
    sender.email.domain.root_domain in $high_trust_sender_root_domains
    and not headers.auth_summary.dmarc.pass
  )
  or sender.email.domain.root_domain not in $high_trust_sender_root_domains
)

// and no false positives and not solicited
and (
  not profile.by_sender().any_messages_benign
  and not profile.by_sender().solicited
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Brand impersonation: Fastway"
description: |
  Impersonation of Fastway Couriers, a delivery services company in Ireland and South Africa.
type: "rule"
severity: "medium"
source: |
  type.inbound
  and (
    strings.ilike(sender.display_name, '*fastway*')
    or strings.ilevenshtein(sender.display_name, 'fastway couriers') <= 1
  )
  and sender.email.domain.root_domain not in~ (
    'fastway.co.za',
    'fastway.com.au',
    'fastway.ie'
  )
  
  // negate highly trusted sender domains unless they fail DMARC authentication
  and (
    (
      sender.email.domain.root_domain in $high_trust_sender_root_domains
      and not headers.auth_summary.dmarc.pass
    )
    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
  )
  
  // and no false positives and not solicited
  and (
    not profile.by_sender().any_messages_benign
    and not profile.by_sender().solicited
  )
attack_types:
  - "Credential Phishing"
tactics_and_techniques:
  - "Impersonation: Brand"
  - "Lookalike domain"
  - "Social engineering"
detection_methods:
  - "Sender analysis"
id: "0170dbf2-418f-5e12-a685-7cee3de33f2d"