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Create link_fake_webmail_hosting.yml #5252

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Merged
keaton-sublime merged 3 commits into from
Sep 9, 2026
+25 −0
Merged

Create link_fake_webmail_hosting.yml #5252

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47e420a
Create link_fake_webmail_hosting.yml
keaton-sublime Sep 2, 2026
1caa7aa
Auto-format MQL and add rule IDs
Sep 2, 2026
71b8051
Merge branch 'main' into keaton-sublime.fn.esc-24030.webmail
keaton-sublime Sep 4, 2026
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25 changes: 25 additions & 0 deletions detection-rules/link_fake_webmail_hosting.yml
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name: "Link: Fake webmail hosting"
description: "Detects inbound messages that impersonate a webmail hosting service by including an HTML heading referencing 'Webmail HostingServer' or by using a link whose display text and destination are both set to an email address (support@webmail.com)."
type: "rule"
severity: "medium"
source: |
type.inbound
and (
any(html.xpath(body.html, '//h3').nodes,
.inner_text == "Webmail HostingServer"
)
or (
any(body.links,
.display_url.url == "support@webmail.com"
and .href_url.url == "support@webmail.com"
)
)
)
attack_types:
- "Credential Phishing"
tactics_and_techniques:
- "Social engineering"
detection_methods:
- "HTML analysis"
- "URL analysis"
id: "d8218991-489e-51b4-8be9-991f627ce9a5"
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