sublimemediumRule

Brand impersonation: Zoom with deceptive link display

Detects messages mentioning Zoom in the subject or body that contain links appearing to go to zoom.us but actually redirect to different domains.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598 T1204.002 T1486 T1598.003

initial-access

Detection Query

type.inbound
and sender.email.domain.root_domain in $free_email_providers
and any([subject.base, body.current_thread.text], strings.icontains(., "zoom"))
and any(filter(body.current_thread.links,
               strings.icontains(.href_url.url, "zoom.us")
        ),
        .href_url.domain.root_domain not in ("zoom.us", "zoom.com")
        and .display_url.domain.root_domain not in ("zoom.us", "zoom.com")
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Brand impersonation: Zoom with deceptive link display"
description: "Detects messages mentioning Zoom in the subject or body that contain links appearing to go to zoom.us but actually redirect to different domains."
type: "rule"
severity: "medium"
source: |
  type.inbound
  and sender.email.domain.root_domain in $free_email_providers
  and any([subject.base, body.current_thread.text], strings.icontains(., "zoom"))
  and any(filter(body.current_thread.links,
                 strings.icontains(.href_url.url, "zoom.us")
          ),
          .href_url.domain.root_domain not in ("zoom.us", "zoom.com")
          and .display_url.domain.root_domain not in ("zoom.us", "zoom.com")
  )
attack_types:
  - "Credential Phishing"
  - "Malware/Ransomware"
tactics_and_techniques:
  - "Impersonation: Brand"
detection_methods:
  - "Content analysis"
  - "URL analysis"
id: "de5b26b7-24fa-531a-9906-b4391884d133"