Open redirect: Indeed
Detects emails containing links using Indeed '/r?target=xxxxxx' open redirect where the email has not come from indeed.com
Sublime rule (View on GitHub)
1name: "Open redirect: Indeed"
2description: "Detects emails containing links using Indeed '/r?target=xxxxxx' open redirect where the email has not come from indeed.com"
3references:
4 - "https://www.bleepingcomputer.com/news/security/evilproxy-uses-indeedcom-open-redirect-for-microsoft-365-phishing/"
5type: "rule"
6severity: "medium"
7source: |
8 type.inbound
9 and (
10 (
11 sender.email.domain.root_domain != "indeed.com"
12 and any(body.links, "indeed_open_redirect" in .href_url.rewrite.encoders)
13 )
14 or any(attachments,
15 .file_type == "pdf"
16 and any(file.explode(.),
17 any(.scan.url.urls, "indeed_open_redirect" in .rewrite.encoders)
18 )
19 )
20 )
21
22 // negate highly trusted sender domains unless they fail DMARC authentication
23 and (
24 (
25 sender.email.domain.root_domain in $high_trust_sender_root_domains
26 and not headers.auth_summary.dmarc.pass
27 )
28 or sender.email.domain.root_domain not in $high_trust_sender_root_domains
29 )
30attack_types:
31 - "Credential Phishing"
32 - "Malware/Ransomware"
33tactics_and_techniques:
34 - "Open redirect"
35detection_methods:
36 - "Sender analysis"
37 - "URL analysis"
38id: "98ce5477-49dd-5e60-b778-f8c2fcb283c2"