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GetSymbolicLinkTarget.cpp
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GetSymbolicLinkTarget.cpp
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#include "common.h"
std::wstring GetSymbolicLinkTarget(_In_ std::wstring symLinkName)
{
RAII::Hmodule ntdllModule = LoadLibraryW(L"ntdll.dll");
if (!ntdllModule.GetHmodule())
{
std::cout << "[-] Couldn't open a handle to ntdll! Error: 0x" << std::hex << GetLastError() << std::endl;
return L"";
}
pNtOpenSymbolicLinkObject NtOpenSymbolicLinkObject = (pNtOpenSymbolicLinkObject)GetProcAddress(ntdllModule.GetHmodule(), "NtOpenSymbolicLinkObject");
if (!NtOpenSymbolicLinkObject)
{
std::cout << "[-] Couldn't resolve NtOpenSymbolicLinkObject address! Error: 0x" << std::hex << GetLastError() << std::endl;
return L"";
}
pNtQuerySymbolicLinkObject NtQuerySymbolicLinkObject = (pNtQuerySymbolicLinkObject)GetProcAddress(ntdllModule.GetHmodule(), "NtQuerySymbolicLinkObject");
if (!NtQuerySymbolicLinkObject)
{
std::cout << "[-] Couldn't resolve NtQuerySymbolicLinkObject address! Error: 0x" << std::hex << GetLastError() << std::endl;
return L"";
}
// build OBJECT_ATTRIBUTES structure to reference and then delete the permanent symbolic link to the driver path
UNICODE_STRING symlinkPath;
RtlInitUnicodeString(&symlinkPath, symLinkName.c_str());
OBJECT_ATTRIBUTES symlinkObjAttr{};
InitializeObjectAttributes(&symlinkObjAttr, &symlinkPath, OBJ_KERNEL_HANDLE, NULL, NULL);
HANDLE tempSymLinkHandle;
NTSTATUS status = NtOpenSymbolicLinkObject(&tempSymLinkHandle, GENERIC_READ, &symlinkObjAttr);
RAII::Handle symLinkHandle = tempSymLinkHandle;
UNICODE_STRING LinkTarget{};
wchar_t buffer[MAX_PATH] = { L'\0' };
LinkTarget.Buffer = buffer;
LinkTarget.Length = 0;
LinkTarget.MaximumLength = MAX_PATH;
status = NtQuerySymbolicLinkObject(symLinkHandle.GetHandle(), &LinkTarget, nullptr);
if (!NT_SUCCESS(status))
{
Error(RtlNtStatusToDosError(status));
std::wcout << L"[-] Couldn't get the target of the symbolic link " << symLinkName << std::endl;
return L"";
}
else std::wcout << "[+] Symbolic link target is: " << LinkTarget.Buffer << std::endl;
return LinkTarget.Buffer;
}