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~ (
19      'ws-doordash.sendbird.com',
20      'qemailserver.com',
21      'sent-via.netsuite.com'
22    )
23  )
24  and 0 < length(body.links) < 10
25  and not all(body.links,
26              .href_url.domain.root_domain in (
27                'doordash.com',
28                'cdn4dd.com',
29                'doordash.team'
30              )
31  )
32  and (
33    not profile.by_sender().solicited
34    or profile.by_sender().any_messages_malicious_or_spam
35  )
36  and not profile.by_sender().any_messages_benign
37  
38  // negate highly trusted sender domains unless they fail DMARC authentication
39  and (
40    (
41      sender.email.domain.root_domain in $high_trust_sender_root_domains
42      and not headers.auth_summary.dmarc.pass
43    )
44    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
45  )  
46attack_types:
47  - "Credential Phishing"
48tactics_and_techniques:
49  - "Impersonation: Brand"
50  - "Social engineering"
51detection_methods:
52  - "Header analysis"
53  - "Sender analysis"
54id: "b0aaaed5-d437-599e-b884-96dddb9980a2"