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Shellcoding

Stuff related to shellcoding (shellcodes, tools, examples, tutorials)

Cheatsheet

32 bits ELF

Calling convention

Syscall in EAX

Arguments : EBX, ECX, EDX, ESI, EDI, EBP

Return value in EAX

syscall with int 0x80

64 bits ELF

Calling convention

Syscall in RAX

Arguments : RDI, RSI, RDX, R10, R9, R8

Return value in RAX

syscall with syscall

Calling convention

Tools

dump_shellcode.sh

Dumps a shellcode string from a valid ELF file using objdump

I recommend you creating an alias pointing to the dump_shellcode.sh

shellcode_executor.c

Executes a shellcode in C

Be careful about the fact that the shellcode is 32 or 64 bits.

32 bits shellcode

gcc -m32 shellcode_executor.c -o shellcode_32.elf

64 bits shellcode

gcc shellcode_executor.c -o shellcode_64.elf

shellcode_executor.py

Executes a shellcode in python

Usage :

./shellcode_executor.py

The file must contains the shellcode like this :

\xef\xbe\xad\xde

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