337 lines
16 KiB
Python
337 lines
16 KiB
Python
from sys import exit
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from nxc.connection import dcom_FirewallChecker
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from impacket.dcerpc.v5 import rrp
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from impacket.examples.secretsdump import RemoteOperations
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from impacket.dcerpc.v5.dcomrt import DCOMConnection
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from impacket.dcerpc.v5.dcom import wmi
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from impacket.dcerpc.v5.dtypes import NULL
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from impacket.dcerpc.v5.rpcrt import RPC_C_AUTHN_LEVEL_PKT_PRIVACY
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import contextlib
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class NXCModule:
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name = "rdp"
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description = "Enables/Disables RDP"
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supported_protocols = ["smb", "wmi"]
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opsec_safe = True
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multiple_hosts = True
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def __init__(self, context=None, module_options=None):
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self.context = context
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self.module_options = module_options
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self.action = None
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def options(self, context, module_options):
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"""
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ACTION Enable/Disable RDP (choices: enable, disable, enable-ram, disable-ram)
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METHOD wmi(ncacn_ip_tcp)/smb(ncacn_np) (choices: wmi, smb, default is wmi)
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OLD For old version system (under NT6, like: server 2003)
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DCOM-TIMEOUT Set the Dcom connection timeout for WMI method (Default is 10 seconds)
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nxc smb 192.168.1.1 -u {user} -p {password} -M rdp -o ACTION={enable, disable, enable-ram, disable-ram} {OLD=true} {DCOM-TIMEOUT=5}
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nxc smb 192.168.1.1 -u {user} -p {password} -M rdp -o METHOD=smb ACTION={enable, disable, enable-ram, disable-ram}
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nxc smb 192.168.1.1 -u {user} -p {password} -M rdp -o METHOD=wmi ACTION={enable, disable, enable-ram, disable-ram} {OLD=true} {DCOM-TIMEOUT=5}
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"""
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if "ACTION" not in module_options:
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context.log.fail("ACTION option not specified!")
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exit(1)
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if module_options["ACTION"].lower() not in ["enable", "disable", "enable-ram", "disable-ram"]:
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context.log.fail("Invalid value for ACTION option!")
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exit(1)
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self.action = module_options["ACTION"].lower()
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if "METHOD" not in module_options:
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self.method = "wmi"
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else:
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self.method = module_options["METHOD"].lower()
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if context.protocol != "smb" and self.method == "smb":
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context.log.fail(f"Protocol: {context.protocol} not support this method")
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exit(1)
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if "DCOM-TIMEOUT" not in module_options:
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self.dcom_timeout = 10
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else:
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try:
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self.dcom_timeout = int(module_options["DCOM-TIMEOUT"])
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except Exception:
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context.log.fail("Wrong DCOM timeout value!")
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exit(1)
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if "OLD" not in module_options:
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self.oldSystem = False
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else:
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self.oldSystem = True
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def on_admin_login(self, context, connection):
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# Preparation for wmi protocol
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if self.method == "smb":
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context.log.info("Executing over SMB(ncacn_np)")
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try:
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smb_rdp = RdpSmb(context, connection)
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if "ram" in self.action:
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smb_rdp.rdp_ram_wrapper(self.action)
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else:
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smb_rdp.rdp_wrapper(self.action)
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except Exception as e:
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context.log.fail(f"Enable RDP via smb error: {e!s}")
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elif self.method == "wmi":
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context.log.info("Executing over WMI(ncacn_ip_tcp)")
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wmi_rdp = RdpWmi(context, connection, self.dcom_timeout)
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if hasattr(wmi_rdp, "_rdp_WMI__iWbemLevel1Login"):
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if "ram" in self.action:
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# Nt version under 6 not support RAM.
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try:
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wmi_rdp.rdp_ram_wrapper(self.action)
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except Exception as e:
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if "WBEM_E_NOT_FOUND" in str(e):
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context.log.fail("System version under NT6 not support restricted admin mode")
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else:
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context.log.fail(str(e))
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else:
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try:
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wmi_rdp.rdp_wrapper(self.action, self.oldSystem)
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except Exception as e:
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if "WBEM_E_INVALID_NAMESPACE" in str(e):
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context.log.fail("Looks like target system version is under NT6, please add 'OLD=true' in module options.")
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else:
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context.log.fail(str(e))
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wmi_rdp._rdp_WMI__dcom.disconnect()
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class RdpSmb:
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def __init__(self, context, connection):
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self.context = context
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self.__smbconnection = connection.conn
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self.__execute = connection.execute
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self.logger = context.log
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def rdp_wrapper(self, action):
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remote_ops = RemoteOperations(self.__smbconnection, False)
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remote_ops.enableRegistry()
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if remote_ops._RemoteOperations__rrp:
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ans = rrp.hOpenLocalMachine(remote_ops._RemoteOperations__rrp)
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reg_handle = ans["phKey"]
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ans = rrp.hBaseRegOpenKey(
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remote_ops._RemoteOperations__rrp,
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reg_handle,
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"SYSTEM\\CurrentControlSet\\Control\\Terminal Server",
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)
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key_handle = ans["phkResult"]
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ans = rrp.hBaseRegSetValue(
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remote_ops._RemoteOperations__rrp,
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key_handle,
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"fDenyTSConnections",
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rrp.REG_DWORD,
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0 if action == "enable" else 1,
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)
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rtype, data = rrp.hBaseRegQueryValue(remote_ops._RemoteOperations__rrp, key_handle, "fDenyTSConnections")
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if int(data) == 0:
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self.logger.success("Enable RDP via SMB(ncacn_np) successfully")
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elif int(data) == 1:
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self.logger.success("Disable RDP via SMB(ncacn_np) successfully")
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self.firewall_cmd(action)
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if action == "enable":
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self.query_rdp_port(remote_ops, reg_handle)
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with contextlib.suppress(Exception):
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remote_ops.finish()
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def rdp_ram_wrapper(self, action):
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remote_ops = RemoteOperations(self.__smbconnection, False)
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remote_ops.enableRegistry()
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if remote_ops._RemoteOperations__rrp:
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ans = rrp.hOpenLocalMachine(remote_ops._RemoteOperations__rrp)
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reg_handle = ans["phKey"]
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ans = rrp.hBaseRegOpenKey(
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remote_ops._RemoteOperations__rrp,
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reg_handle,
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"System\\CurrentControlSet\\Control\\Lsa",
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)
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key_handle = ans["phkResult"]
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rrp.hBaseRegSetValue(
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remote_ops._RemoteOperations__rrp,
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key_handle,
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"DisableRestrictedAdmin",
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rrp.REG_DWORD,
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0 if action == "enable-ram" else 1,
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)
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rtype, data = rrp.hBaseRegQueryValue(remote_ops._RemoteOperations__rrp, key_handle, "DisableRestrictedAdmin")
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if int(data) == 0:
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self.logger.success("Enable RDP Restricted Admin Mode via SMB(ncacn_np) succeed")
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elif int(data) == 1:
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self.logger.success("Disable RDP Restricted Admin Mode via SMB(ncacn_np) succeed")
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with contextlib.suppress(Exception):
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remote_ops.finish()
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def query_rdp_port(self, remoteOps, regHandle):
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if remoteOps:
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ans = rrp.hBaseRegOpenKey(
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remoteOps._RemoteOperations__rrp,
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regHandle,
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"SYSTEM\\CurrentControlSet\\Control\\Terminal Server\\WinStations\\RDP-Tcp",
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)
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key_handle = ans["phkResult"]
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rtype, data = rrp.hBaseRegQueryValue(remoteOps._RemoteOperations__rrp, key_handle, "PortNumber")
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self.logger.success(f"RDP Port: {data!s}")
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# https://github.com/rapid7/metasploit-framework/blob/master/modules/post/windows/manage/enable_rdp.rb
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def firewall_cmd(self, action):
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cmd = f"netsh firewall set service type = remotedesktop mode = {action}"
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self.logger.info("Configure firewall via execute command.")
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output = self.__execute(cmd, True)
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if output:
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self.logger.success(f"{action.capitalize()} RDP firewall rules via cmd succeed")
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else:
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self.logger.fail(f"{action.capitalize()} RDP firewall rules via cmd failed, maybe got detected by AV software.")
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class RdpWmi:
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def __init__(self, context, connection, timeout):
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self.logger = context.log
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self.__currentprotocol = context.protocol
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# From dfscoerce.py
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self.__username = connection.username
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self.__password = connection.password
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self.__domain = connection.domain
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self.__lmhash = connection.lmhash
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self.__nthash = connection.nthash
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self.__target = connection.host if not connection.kerberos else connection.hostname + "." + connection.domain
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self.__doKerberos = connection.kerberos
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self.__kdcHost = connection.kdcHost
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self.__aesKey = connection.aesKey
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self.__timeout = timeout
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try:
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self.__dcom = DCOMConnection(
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self.__target,
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self.__username,
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self.__password,
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self.__domain,
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self.__lmhash,
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self.__nthash,
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self.__aesKey,
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oxidResolver=True,
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doKerberos=self.__doKerberos,
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kdcHost=self.__kdcHost,
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)
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i_interface = self.__dcom.CoCreateInstanceEx(wmi.CLSID_WbemLevel1Login, wmi.IID_IWbemLevel1Login)
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if self.__currentprotocol == "smb":
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flag, self.__stringBinding = dcom_FirewallChecker(i_interface, self.__timeout)
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if not flag or not self.__stringBinding:
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error_msg = f'RDP-WMI: Dcom initialization failed on connection with stringbinding: "{self.__stringBinding}", please increase the timeout with the module option "DCOM-TIMEOUT=10". If it\'s still failing maybe something is blocking the RPC connection, please try to use "-o" with "METHOD=smb"'
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if not self.__stringBinding:
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error_msg = "RDP-WMI: Dcom initialization failed: can't get target stringbinding, maybe cause by IPv6 or any other issues, please check your target again"
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self.logger.fail(error_msg) if not flag else self.logger.debug(error_msg)
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# Make it force break function
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self.__dcom.disconnect()
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self.__iWbemLevel1Login = wmi.IWbemLevel1Login(i_interface)
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except Exception as e:
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self.logger.fail(f'Unexpected wmi error: {e}, please try to use "-o" with "METHOD=smb"')
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if self.__iWbemLevel1Login in locals():
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self.__dcom.disconnect()
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def rdp_wrapper(self, action, old=False):
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if old is False:
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# According to this document: https://learn.microsoft.com/en-us/windows/win32/termserv/win32-tslogonsetting
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# Authentication level must set to RPC_C_AUTHN_LEVEL_PKT_PRIVACY when accessing namespace "//./root/cimv2/TerminalServices"
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i_wbem_services = self.__iWbemLevel1Login.NTLMLogin("//./root/cimv2/TerminalServices", NULL, NULL)
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i_wbem_services.get_dce_rpc().set_auth_level(RPC_C_AUTHN_LEVEL_PKT_PRIVACY)
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self.__iWbemLevel1Login.RemRelease()
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i_enum_wbem_class_object = i_wbem_services.ExecQuery("SELECT * FROM Win32_TerminalServiceSetting")
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i_wbem_class_object = i_enum_wbem_class_object.Next(0xFFFFFFFF, 1)[0]
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if action == "enable":
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self.logger.info("Enabled RDP services and setting up firewall.")
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i_wbem_class_object.SetAllowTSConnections(1, 1)
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elif action == "disable":
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self.logger.info("Disabled RDP services and setting up firewall.")
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i_wbem_class_object.SetAllowTSConnections(0, 0)
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else:
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i_wbem_services = self.__iWbemLevel1Login.NTLMLogin("//./root/cimv2", NULL, NULL)
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self.__iWbemLevel1Login.RemRelease()
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i_enum_wbem_class_object = i_wbem_services.ExecQuery("SELECT * FROM Win32_TerminalServiceSetting")
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i_wbem_class_object = i_enum_wbem_class_object.Next(0xFFFFFFFF, 1)[0]
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if action == "enable":
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self.logger.info("Enabling RDP services (old system not support setting up firewall)")
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i_wbem_class_object.SetAllowTSConnections(1)
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elif action == "disable":
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self.logger.info("Disabling RDP services (old system not support setting up firewall)")
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i_wbem_class_object.SetAllowTSConnections(0)
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self.query_rdp_result(old)
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if action == "enable":
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self.query_rdp_port()
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# Need to create new iWbemServices interface in order to flush results
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def query_rdp_result(self, old=False):
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if old is False:
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i_wbem_services = self.__iWbemLevel1Login.NTLMLogin("//./root/cimv2/TerminalServices", NULL, NULL)
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i_wbem_services.get_dce_rpc().set_auth_level(RPC_C_AUTHN_LEVEL_PKT_PRIVACY)
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self.__iWbemLevel1Login.RemRelease()
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i_enum_wbem_class_object = i_wbem_services.ExecQuery("SELECT * FROM Win32_TerminalServiceSetting")
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i_wbem_class_object = i_enum_wbem_class_object.Next(0xFFFFFFFF, 1)[0]
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result = dict(i_wbem_class_object.getProperties())
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result = result["AllowTSConnections"]["value"]
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if result == 0:
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self.logger.success("Disable RDP via WMI(ncacn_ip_tcp) successfully")
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else:
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self.logger.success("Enable RDP via WMI(ncacn_ip_tcp) successfully")
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else:
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i_wbem_services = self.__iWbemLevel1Login.NTLMLogin("//./root/cimv2", NULL, NULL)
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self.__iWbemLevel1Login.RemRelease()
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i_enum_wbem_class_object = i_wbem_services.ExecQuery("SELECT * FROM Win32_TerminalServiceSetting")
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i_wbem_class_object = i_enum_wbem_class_object.Next(0xFFFFFFFF, 1)[0]
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result = dict(i_wbem_class_object.getProperties())
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result = result["AllowTSConnections"]["value"]
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if result == 0:
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self.logger.success("Disable RDP via WMI(ncacn_ip_tcp) successfully (old system)")
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else:
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self.logger.success("Enable RDP via WMI(ncacn_ip_tcp) successfully (old system)")
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def query_rdp_port(self):
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i_wbem_services = self.__iWbemLevel1Login.NTLMLogin("//./root/DEFAULT", NULL, NULL)
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self.__iWbemLevel1Login.RemRelease()
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std_reg_prov, resp = i_wbem_services.GetObject("StdRegProv")
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out = std_reg_prov.GetDWORDValue(2147483650, "SYSTEM\\CurrentControlSet\\Control\\Terminal Server\\WinStations\\RDP-Tcp", "PortNumber")
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self.logger.success(f"RDP Port: {out.uValue!s}")
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# Nt version under 6 not support RAM.
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def rdp_ram_wrapper(self, action):
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i_wbem_services = self.__iWbemLevel1Login.NTLMLogin("//./root/cimv2", NULL, NULL)
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self.__iWbemLevel1Login.RemRelease()
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std_reg_prov, resp = i_wbem_services.GetObject("StdRegProv")
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if action == "enable-ram":
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self.logger.info("Enabling Restricted Admin Mode.")
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std_reg_prov.SetDWORDValue(2147483650, "System\\CurrentControlSet\\Control\\Lsa", "DisableRestrictedAdmin", 0)
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elif action == "disable-ram":
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self.logger.info("Disabling Restricted Admin Mode (Clear).")
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std_reg_prov.DeleteValue(2147483650, "System\\CurrentControlSet\\Control\\Lsa", "DisableRestrictedAdmin")
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out = std_reg_prov.GetDWORDValue(2147483650, "System\\CurrentControlSet\\Control\\Lsa", "DisableRestrictedAdmin")
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if out.uValue == 0:
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self.logger.success("Enable RDP Restricted Admin Mode via WMI(ncacn_ip_tcp) successfully")
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elif out.uValue is None:
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self.logger.success("Disable RDP Restricted Admin Mode via WMI(ncacn_ip_tcp) successfully")
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