Update README.md

Author: Nauman Mustafa

README.md

@@ -1,2 +1,17 @@
-# shellcode-loader
-Shellcode Loader Engine for Windows
+# Shellcode Loader
+Shellcode Loader Engine for Windows. This makes testing and debugging shellcode easier. This is quite simple shellcode loader which simply loads shellcode (binary file) in memory and runs it.
+## Usage
+Start scLoader.exe with commandline and first argument should be path of shellcode to be tested.
+~~~
+scLoader <Path_To_ShellCode>
+~~~
+# Shellcode
+In hacking, a shellcode is a small piece of code used as the payload in the exploitation of a software vulnerability. -[Wikipedia](https://en.wikipedia.org/wiki/Shellcode)
+# Resources
+Shellcodes are pieces of machine code which run can independently. 
+* They are mostly used in Hacking but its applications are not limited to it. 
+* They can be used as functions which perform specific task just like plugin.
+* In managed (.Net) or interpreted environment, they can be used to execute performance critical tasks.
+* They sre generated by JIT Compilers which compile high level languages to machine code when needed.
+
+Normally shellcodes are written in assembly language and then compiles using NASM, but there are techniques which allow shellcode development through C/C++.