Update credential_theft_cloud_storage_impersonation.yml

detection-rules/credential_theft_cloud_storage_impersonation.yml

@@ -17,7 +17,8 @@ source: |
                       "storage.{0,50}details",
                       "storage.{0,50}quot",
                       "(?:mailbox|cloud|account).{0,50}disabled",
-                      "(?:email|cloud|total).{0,50}storage"
+                      "(?:email|cloud|total).{0,50}storage",
+                      "(?:account|cloud).{0,50}(?:suspended?|at risk)"
   )
   and not strings.ilike(beta.ocr(file.message_screenshot()).text, "*free plan*")
   and (
@@ -31,6 +32,22 @@ source: |
           or .href_url.domain.root_domain == "beehiiv.com"
         )
     )
+    or (
+      (
+        not headers.auth_summary.spf.pass
+        or (
+          headers.return_path.domain.root_domain is not null
+          and headers.return_path.domain.root_domain != sender.email.domain.root_domain
+        )
+      )
+      // negate security training platforms
+      and headers.return_path.domain.root_domain not in~ (
+        "knowbe4.com",
+        "proofpoint.com",
+        "cofense.com",
+        "infosec.com"
+      )
+    )
   )
 
   // and the sender is not from high trust sender root domains