sublimemediumRule

Brand impersonation: Zoom via HTML styling

Detects messages impersonating Zoom by identifying HTML table cells with specific blue styling (rgb(11,92,255)) containing Zoom branding in header elements.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598 T1598.003

initial-access

Detection Query

type.inbound
and any(html.xpath(body.html, '//tr/td[contains(@style, "rgb(11,92,255)")]/h1').nodes,
        strings.icontains(.display_text, "zoom")
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Raw Content

name: "Brand impersonation: Zoom via HTML styling"
description: "Detects messages impersonating Zoom by identifying HTML table cells with specific blue styling (rgb(11,92,255)) containing Zoom branding in header elements."
type: "rule"
severity: "medium"
source: |
  type.inbound
  and any(html.xpath(body.html, '//tr/td[contains(@style, "rgb(11,92,255)")]/h1').nodes,
          strings.icontains(.display_text, "zoom")
  )
attack_types:
  - "Credential Phishing"
tactics_and_techniques:
  - "Impersonation: Brand"
  - "Social engineering"
detection_methods:
  - "Content analysis"
  - "HTML analysis"
id: "b717920d-5da0-581f-bd72-3d62c568e96f"