diff --git a/detection-rules/link_zoom_docs_direct.yml b/detection-rules/link_zoom_docs_direct.yml new file mode 100644 index 00000000000..92c0f51d51c --- /dev/null +++ b/detection-rules/link_zoom_docs_direct.yml @@ -0,0 +1,27 @@ +name: "Link: Direct link to Zoom Docs from Non-Zoom Sender" +description: "Message includes a single link to Zoom Docs, with no other links to zoom and originates from a sender outside the Zoom organization " +type: "rule" +severity: "medium" +source: | + type.inbound + // contains a link to zoom docs + and any(body.links, .href_url.domain.domain == "docs.zoom.us") + // is the only link to zoom + and length(filter(body.links, .href_url.domain.root_domain == "zoom.us")) == 1 + // not from zoom.us + and not ( + sender.email.domain.root_domain == "zoom.us" + and headers.auth_summary.dmarc.pass + ) +tags: + - "Attack surface reduction" +attack_types: + - "Credential Phishing" +tactics_and_techniques: + - "Social engineering" + - "Impersonation: Brand" +detection_methods: + - "Header analysis" + - "URL analysis" + - "Sender analysis" +id: "5c6362db-62e0-56c9-b988-ad17a2738a47"