Brand impersonation: FedEx

 1name: "Brand impersonation: FedEx"
 2description: |
 3    Impersonation of the shipping provider FedEx.
 4references:
 5  - "https://www.fedex.com/en-us/trust-center/report-fraud/fraudulent-email-examples.html"
 6type: "rule"
 7severity: "low"
 8source: |
 9  type.inbound
10  and (
11    sender.display_name in~ ('fedex', 'fedex shipment', 'fedex tracking updates')
12    or strings.ilevenshtein(sender.display_name, 'fedex') <= 1
13    or regex.icontains(sender.display_name, '^Fed-?ex')
14    or strings.ilike(sender.email.domain.domain, '*fedex*')
15  )
16  // sedex.com is not affiliated with FedEx, but is an apparent FP
17  and sender.email.domain.root_domain not in~ ('fedex.com', 'sedex.com', 'myworkday.com', 'billtrust.com')
18  and (
19    not profile.by_sender().any_false_positives
20    and not profile.by_sender().solicited
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  - "Header analysis"
39  - "Sender analysis"
40id: "94a2b602-2bc1-5ea3-941e-752e3a2235cf"