Brand impersonation: FedEx

name: "Brand impersonation: FedEx"
description: |
  Impersonation of the shipping provider FedEx.
references:
  - "https://www.fedex.com/en-us/trust-center/report-fraud/fraudulent-email-examples.html"
type: "rule"
severity: "low"
source: |
  type.inbound
  and (
    sender.display_name in~ ('fedex', 'fedex shipment', 'fedex tracking updates')
    or strings.ilevenshtein(sender.display_name, 'fedex') <= 1
    or regex.icontains(sender.display_name, '^Fed-?ex')
    or strings.ilike(sender.email.domain.domain, '*fedex*')
    or (
      any(ml.logo_detect(file.message_screenshot()).brands, .name == "FedEx")
      and any(ml.nlu_classifier(body.current_thread.text).entities,
              .name == "request" and strings.icontains(.text, "signature")
      )
    )
  )
  and sender.email.domain.root_domain not in~ (
    'fedex.com',
    'cj.com', // CJ is a global affiliate marketing network
    'sedex.com', // sedex.com is not affiliated with FedEx, but is an apparent FP
    'myworkday.com',
    'billtrust.com',
    'flying-cargo.rs', // Serbian arm of Fedex (https://www.fedex.com/en-rs/customer-support.html)
    'confirmit.com', // survey/market research company
    'centercode.com' // survey company
  )
  and (
    not profile.by_sender().any_messages_benign
    and not profile.by_sender().solicited
  )
  
  // 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
  )
attack_types:
  - "Credential Phishing"
tactics_and_techniques:
  - "Impersonation: Brand"
  - "Lookalike domain"
  - "Social engineering"
detection_methods:
  - "Header analysis"
  - "Sender analysis"
id: "94a2b602-2bc1-5ea3-941e-752e3a2235cf"