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释放LoadLibrary()加载的DLL #3

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释放LoadLibrary()加载的DLL #3

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abe3ea8
Transcode to UTF-8
39blackwing Nov 7, 2019
b5d5c37
Constant param
39blackwing Nov 7, 2019
1b7b6b2
Automatically free library
39blackwing Nov 7, 2019
1f1559f
Use std::list instead of std::deque
39blackwing Nov 8, 2019
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21 changes: 16 additions & 5 deletions dllhijack.cpp
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Original file line number Diff line number Diff line change
@@ -1,5 +1,15 @@
#include "dllhijack.h"
#include <windows.h>
#include <list>

class HmoduleContainer {
public:
void Push(const HMODULE &handle) { Handles.push_back(handle); };
~HmoduleContainer() { for (auto handle : Handles) FreeLibrary(handle); }

private:
std::list<HMODULE> Handles;
} g_HmoduleContainer;

typedef struct _UNICODE_STRING {
USHORT Length;
Expand Down Expand Up @@ -75,10 +85,10 @@ PEB_LDR_DATA* NtGetPebLdr(void* peb)
}

/*
dllname: ���ٳ�dll��ԭʼ����
OrigDllPath: ���ٳ�dll�����������·��
dllname: 被劫持dll的原始名字
OrigDllPath: 被劫持dll改名后的完整路径
*/
void SuperDllHijack(LPCWSTR dllname, LPWSTR OrigDllPath)
void SuperDllHijack(LPCWSTR dllname, LPCWSTR OrigDllPath)
{
WCHAR wszDllName[100] = { 0 };
void* peb = NtCurrentPeb();
Expand All @@ -93,9 +103,10 @@ void SuperDllHijack(LPCWSTR dllname, LPWSTR OrigDllPath)
memcpy(wszDllName, data->BaseDllName.Buffer, data->BaseDllName.Length);

if (!_wcsicmp(wszDllName, dllname)) {
HMODULE hMod = LoadLibrary(OrigDllPath);
HMODULE hMod = LoadLibraryW(OrigDllPath);
data->DllBase = hMod;
g_HmoduleContainer.Push(hMod);
break;
}
}
}
}
6 changes: 3 additions & 3 deletions dllhijack.h
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
#include <windows.h>

/*
dllname: ���ٳ�dll��ԭʼ����
OrigDllPath: ���ٳ�dll�����������·��
dllname: 被劫持dll的原始名字
OrigDllPath: 被劫持dll改名后的完整路径
*/
void SuperDllHijack(LPCWSTR dllname, LPWSTR OrigDllPath);
void SuperDllHijack(LPCWSTR dllname, LPCWSTR OrigDllPath);