Brand impersonation: DoorDash

 1name: "Brand impersonation: DoorDash"
 2description: "Impersonation of the online food ordering and food delivery platform, DoorDash"
 3type: "rule"
 4severity: "medium"
 5source: |
 6  type.inbound
 7  and (
 8    strings.ilike(sender.display_name, '*doordash*')
 9    or strings.ilevenshtein(sender.display_name, 'doordash') <= 1
10    or strings.ilike(sender.email.domain.domain, '*doordash*')
11  )
12  and (
13    sender.email.domain.root_domain not in~ (
14      'doordash.com',
15      'cdn4dd.com',
16      'doordash.team'
17    )
18    and sender.email.domain.domain not in~ ('ws-doordash.sendbird.com', 'qemailserver.com')
19  )
20  and 0 < length(body.links) < 10
21  and not all(body.links,
22              .href_url.domain.root_domain in (
23                'doordash.com',
24                'cdn4dd.com',
25                'doordash.team'
26              )
27  )
28  and (
29    not profile.by_sender().solicited
30    or profile.by_sender().any_messages_malicious_or_spam
31  )
32  and not profile.by_sender().any_false_positives
33  
34  // negate highly trusted sender domains unless they fail DMARC authentication
35  and (
36    (
37      sender.email.domain.root_domain in $high_trust_sender_root_domains
38      and not headers.auth_summary.dmarc.pass
39    )
40    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
41  )  
42
43attack_types:
44  - "Credential Phishing"
45tactics_and_techniques:
46  - "Impersonation: Brand"
47  - "Social engineering"
48detection_methods:
49  - "Header analysis"
50  - "Sender analysis"
51id: "b0aaaed5-d437-599e-b884-96dddb9980a2"