Zapya Desktop 1.803 - 'ZapyaService.exe' Local Privilege Escalation

# Exploit Title: Zapya Desktop Version ('ZapyaService.exe') Privilege Escalation  
# Date: 2016/9/12
# Exploit Author: Arash Khazaei
# Vendor Homepage: http://www.izapya.com/
# Software Link: http://binaries.izapya.com/Izapya/Windows_PC/ZapyaSetup_1803_en.exe
# Version: 1.803 (Latest)
# Tested on: Windows 7 Professional X86 - Windows 10 Pro X64
# CVE : N/A

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# Description :
# Zapya is a 100% free tool for sharing files across devices like Android, iPhone, iPad, Window’s Phone, PC, and Mac computers in an instant. 
# It’s Easy to use and supports multiple languages. We are already a community of 300 million strong users and growing rapidly.
# When You Install Zapya Desktop , Zapya Will Install A Service Named ZapyaService.exe And It's Placed In Zapya Installation Directory .
# If We Replace The ZapyaService.exe File With A Malicious Executable File It Will Execute As NT/SYSTEM User Privilege.
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# Proof Of Concept :
# 1- Install Zapya Desktop . 
# 2- Generate A Meterpreter Executable Payload .
# 3- Stop Service And Replace It With ZapyaService.exe With Exact Name.
# 4- Listen Handler For Connection And Start Service Again or Open Zapya Desktop , Application Will Attempt To Start Service 
# 5- After Starting Service We Have Reverse Meterpreter Shell With NT/SYSTEM Privilege.

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# Discovered By Arash Khazaei
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