Brand impersonation: Twitter

 1name: "Brand impersonation: Twitter"
 2description: |
 3    Impersonation of Twitter
 4references:
 5  - "https://www.techrepublic.com/article/phishing-attack-spoofs-twitter-to-steal-account-credentials/"
 6type: "rule"
 7severity: "medium"
 8source: |
 9  type.inbound
10  and (
11    sender.display_name =~ "twitter"
12    or strings.ilevenshtein(sender.display_name, 'twitter') <= 1
13    or strings.ilike(sender.email.domain.domain, '*twitter*')
14  )
15  and sender.email.domain.domain not in~ ('twitter.com', 'privaterelay.appleid.com', 'stripe.com', 'x.com', 'twitter.discoursemail.com')
16  // negate Hearsay Systems which sends notificaitons from sender domain ending in twitter.com
17  and not (
18    strings.ends_with(sender.email.domain.domain, '.hearsay.twitter.com')
19    and strings.ends_with(headers.message_id, '@hearsaysystems.com>')
20  )
21  and sender.email.email not in $recipient_emails  
22attack_types:
23  - "Credential Phishing"
24tactics_and_techniques:
25  - "Impersonation: Brand"
26  - "Lookalike domain"
27  - "Social engineering"
28detection_methods:
29  - "Sender analysis"
30id: "013c32c2-fa05-5456-9c45-284e008ff6a4"