Add support for passing the shellcode base address to the module export

Some cleanup and additional notes to the README

Python/ConvertToShellcode.py

@@ -10,10 +10,11 @@ def main():
     parser.add_argument('-f', '--function-name', dest='function_name', help='The function to call after DllMain', default='SayHello')
     parser.add_argument('-u', '--user-data', dest='user_data', help='Data to pass to the target function', default='dave')
     parser.add_argument('-c', '--clear-header', dest='clear_header', action='store_true', help='Clear the PE header on load')
+    parser.add_argument('-b', '--pass-shellcode-base', dest='pass_shellcode_base', action='store_true', help='Pass shellcode base address to exported function')
     parser.add_argument('-i', '--obfuscate-imports', dest='obfuscate_imports', action='store_true', help='Randomize import dependency load order', default=False)
     parser.add_argument('-d', '--import-delay', dest='import_delay', help='Number of seconds to pause between loading imports', type=int, default=0)
     parser.add_argument('-of', '--output-format', dest='output_format', help='Output format of the shellcode (e.g. raw,string)', type=str, default="raw")
-    
+
     arguments = parser.parse_args()
 
     input_dll = arguments.input_dll
@@ -29,13 +30,16 @@ def main():
     if arguments.obfuscate_imports:
         flags = flags | 0x4 | arguments.import_delay << 16
 
+    if arguments.pass_shellcode_base:
+        flags |= 0x8
+
     converted_dll = ConvertToShellcode(dll, HashFunctionName(arguments.function_name), arguments.user_data.encode(), flags)
-    
+
     if arguments.output_format=="raw":
         print('Creating Shellcode: {}'.format(output_bin))
         with open(output_bin, 'wb') as f:
            f.write(converted_dll)
-    
+
     elif arguments.output_format=="string":
         output_bin = input_dll.replace('.dll', '.txt')
         converted_dll_text ="".join([r"\x{}".format(str(format(c,'02x'))) for c in converted_dll])