naksyn-GregsBestFriend/CL

Building with cl.exe

To build GregsBestFriend with cl.exe, follow these steps:

1. Open a Developer Command Prompt for Visual Studio.

2. Navigate to the directory containing GregsBestFriend.cpp.

3. Run the following command to compile GregsBestFriend.cpp into an object file:

cl.exe /TP /O1 /GS- /GL /EHsc /c GregsBestFriend.cpp

4. Run the following command to link the object file and create the executable:

link.exe GregsBestFriend.obj /SUBSYSTEM:CONSOLE /NODEFAULTLIB:msvcrt.lib /MT:libcmt.lib /OUT:GregsBestFriend.exe /OPT:REF /OPT:ICF

5. To add your own shellcode to the code, replace the shellcode array in the shellcode() function with your own shellcode.

Explanation of Compiler Flags

• /TP: Specifies that the source file is a C++ file.
• /O1: Specifies optimization for minimum code size.
• /GS-: Disables buffer security checks.
• /GL: Enables whole program optimization.
• /EHsc: Specifies the type of exception handling model to be used.
• /c: Compiles the source file and creates an object file.

Explanation of Linker Flags

• /SUBSYSTEM:CONSOLE: Specifies that the executable is a console application.
• /NODEFAULTLIB:msvcrt.lib: Prevents linking against the default C runtime library.
• /MT:libcmt.lib: Specifies the C runtime library to be used.
• /OUT:GregsBestFriend.exe: Specifies the output file name.
• /OPT:REF: Eliminates unused function and data code.
• /OPT:ICF: Identifies and eliminates redundant code.