Updated DLLirant to the v0.4 version

Visual Studio has been replaced by LLVM to increase the OPSEC (no more visual studio paths visible in the DLL after the build).

Author: Sh0ckFR

DLLirant.py

@@ -44,7 +44,7 @@ def ascii():
 	print('██▪ ██ ██•  ██•  ██ ▀▄ █·▐█ ▀█ •█▌▐█•██  ')
 	print('▐█· ▐█▌██▪  ██▪  ▐█·▐▀▀▄ ▄█▀▀█ ▐█▐▐▌ ▐█.▪')
 	print('██. ██ ▐█▌▐▌▐█▌▐▌▐█▌▐█•█▌▐█ ▪▐▌██▐█▌ ▐█▌·')
-	print('▀▀▀▀▀• .▀▀▀ .▀▀▀ ▀▀▀.▀  ▀ ▀  ▀ ▀▀ █▪ ▀▀▀  v0.3')
+	print('▀▀▀▀▀• .▀▀▀ .▀▀▀ ▀▀▀.▀  ▀ ▀  ▀ ▀▀ █▪ ▀▀▀  v0.4 - Sh0ck (@Sh0ckFR)')
 
 def rreplace(s, old, new):
 	return (s[::-1].replace(old[::-1],new[::-1], 1))[::-1]
@@ -98,8 +98,8 @@ def get_imports_functions(dll_name, imports):
 
 def generate_test_dll(functions = None):
 	exported_functions = []
-	with open('DLLirantDLL\\dllmain-preset.c', 'r') as fin:
-		with open('DLLirantDLL\\dllmain.c', 'w') as fout:
+	with open('DLLirantDLL\\dllmain-preset.cpp', 'r') as fin:
+		with open('DLLirantDLL\\dllmain.cpp', 'w') as fout:
 			if functions is not None:
 				for line in fin:
 					if '##DLL_MAIN##' in line:
@@ -113,7 +113,7 @@ def generate_test_dll(functions = None):
 						else:
 							for func in functions:
 								if len(func) > 0:
-									exported_functions.append(f'__declspec(dllexport) void {func}()' + '{ Main(); }')
+									exported_functions.append(f'extern "C" __declspec(dllexport) void {func}()' + '{ Main(); }')
 							exported_functions = '\n'.join(exported_functions)
 							fout.write(line.replace('##EXPORTED_FUNCTIONS##', exported_functions))
 					else:
@@ -126,13 +126,17 @@ def generate_test_dll(functions = None):
 						fout.write(line.replace('##EXPORTED_FUNCTIONS##', ''))
 					else:
 						fout.write(line)
-	os.system('cd DLLirantDLL && msbuild DLLirantDLL.sln /t:Rebuild /p:Configuration=Release /p:Platform="x64"')
+	os.system('cd DLLirantDLL && clang++ dllmain.cpp -o DLLirantDLL.dll -shared')
+	delete_file('DLLirantDLL\\DLLirantDLL.exp')
+	delete_file('DLLirantDLL\\DLLirantDLL.lib')
+	delete_file('DLLirantDLL\\dllmain.cpp')
 	return exported_functions
 
 def check_dll_hijacking(binary_name, binary_original_directory, dll_name, exported_functions = 'DllMain'):
-	if not os.path.exists(f'DLLirantDLL\\x64\\Release\\DLLirantDLL.dll'):
+	if not os.path.exists('DLLirantDLL\\DLLirantDLL.dll'):
 		return False
-	os.system(f'copy DLLirantDLL\\x64\\Release\\DLLirantDLL.dll output\\{dll_name}')
+	os.system(f'copy DLLirantDLL\\DLLirantDLL.dll output\\{dll_name}')
+	delete_file('DLLirantDLL\\DLLirantDLL.dll')
 	ascii()
 	print('==================================================')
 	print(f'[+] Testing {dll_name}')
@@ -177,8 +181,11 @@ def generate_proxy_dll():
 		exported_functions.append(f'#pragma comment(linker,"/export:{func}={name_dll}.{func},@{entry.ordinal}")')
 	exported_functions = '\n'.join(exported_functions)
 
+	ascii()
 	generate_test_dll(exported_functions)
-	print(f'\n\n[+] Rename the original dll file {name_dll}.dll and copy the compiled dll to the original directory as {original_name}')
+	os.system(f'copy DLLirantDLL\\DLLirantDLL.dll output\\DLLirantProxy.dll')
+	delete_file('DLLirantDLL\\DLLirantDLL.dll')
+	print(f'\n\n[+] Rename the original dll file {name_dll}.dll and copy the compiled dll DLLirantProxy.dll to the original directory as {original_name}')
 
 def main():
 	if ARGS.proxydll:
@@ -191,6 +198,8 @@ def main():
 	# Create or recreate the directory used by the DLLirant DLL specified in dllmain-preset.c file.
 	delete_dir('C:\\DLLirant')
 	create_dir('C:\\DLLirant')
+	delete_dir('output')
+	create_dir('output')
 
 	# Name of the binary specified and his directory.
 	binary_name = os.path.basename(ARGS.file)

DLLirantDLL/DLLirantDLL.sln

@@ -1,10 +1,11 @@
 #include <windows.h>
 #include <stdio.h>
-#include <stdlib.h>
+
+#pragma comment (lib, "User32.lib")
 
 int Main() {
     FILE* fptr;
-    fptr = fopen("C:\\DLLirant\\output.txt", "w");
+    fopen_s(&fptr, "C:\\DLLirant\\output.txt", "w");
     fprintf(fptr, "%s", "It works !\n");
     fclose(fptr);
     MessageBoxW(0, L"DLL Hijack found!", L"DLL Hijack", 0);

DLLirantDLL/DLLirantDLL.vcxproj

@@ -9,20 +9,16 @@ DLLirant is a tool to automatize the DLL Hijacking researches on a specified bin
 
 ## How to install
 
-You need to install Visual Studio Community Edition or superior.
-
-Start `DLLirantDLL.sln` in the directory "DLLirantDLL" to update the Visual Studio version on the project, select "Release x64" in the Visual Studio top menu, select your build tools available in the project properties and close Visual Studio (just one time).
-
-Install pefile from pip:
+* Install LLVM for Windows: https://llvm.org/builds/
+* Do not forget to check the "Add LLVM to the system PATH for current user" during the installation.
+* Install pefile from pip:
 
 ```
 pip3 install pefile
 ```
 
 ## How to use
 
-In a first time you need to start a command line with the tool `x64 Native Tools Command Prompt for VS` (search with the windows touch)
-
 Use the `cd` command to your DLLirant directory and to test a binary:
 
 ```