add powershell code snippet

windows/keep-secure/code/example.ps1

@@ -0,0 +1,53 @@
+$tenantId = '{Your Tenant ID}’
+$clientId = '{Your Client ID}'
+$clientSecret = '{Your Client Secret}'
+
+$authUrl = "https://login.windows.net/{0}/oauth2/token" -f $tenantId
+
+$tokenPayload = @{
+    "resource"='https://graph.windows.net'
+    "client_id" = $clientId
+    "client_secret" = $clientSecret
+    "grant_type"='client_credentials'}
+
+$response = Invoke-RestMethod $authUrl -Method Post -Body $tokenPayload
+$token = $response.access_token
+
+$headers = @{
+    "Content-Type"="application/json"
+    "Accept"="application/json"
+    "Authorization"="Bearer {0}" -f $token }
+
+$apiBaseUrl = "https://ti.securitycenter.windows.com/V1.0/"
+
+$alertDefinitions =
+    (Invoke-RestMethod ("{0}AlertDefinitions" -f $apiBaseUrl) -Method Get -Headers $headers).value
+
+$alertDefinitionPayload = @{
+    "Name"= "The Alert's Name"
+    "Severity"= "Low"
+    "InternalDescription"= "An internal description of the Alert"
+    "Title"= "The Title"
+
+    "UxDescription"= "Description of the alerts"
+    "RecommendedAction"= "The alert's recommended action"
+    "Category"= "Trojan"
+    "Enabled"= "true"}
+
+$alertDefinition =
+    Invoke-RestMethod ("{0}AlertDefinitions" -f $apiBaseUrl) `
+        -Method Post -Headers $headers -Body ($alertDefinitionPayload | ConvertTo-Json)
+
+$alertDefinitionId = $alertDefinition.Id
+
+$iocPayload = @{
+    "Type"="Sha1"
+    "Value"="dead1111eeaabbccddeeaabbccddee11ffffffff"
+    "DetectionFunction"="Equals"
+    "Enabled"="true"
+    "AlertDefinition@odata.bind"="AlertDefinitions({0})" -f $alertDefinitionId }
+
+
+$ioc =
+    Invoke-RestMethod ("{0}IndicatorsOfCompromise" -f $apiBaseUrl) `
+         -Method Post -Headers $headers -Body ($iocPayload | ConvertTo-Json)