InfoSec LAB

Internal_OffSec_MSRPC

Created: 4 min read

MSRPC

Nmap discovered a MSRPC server on the target port 135 The running service is Microsoft Windows RPC

┌──(kali㉿kali)-[~/PEN-200/PG_PRACTICE/internal_offsec]
└─$ rpcclient $IP -N -U ''                 
rpcclient $> srvinfo
do_cmd: Could not initialise srvsvc. Error was NT_STATUS_ACCESS_DENIED
rpcclient $> enumdomusers
do_cmd: Could not initialise samr. Error was NT_STATUS_ACCESS_DENIED
rpcclient $> lsaenumsid
do_cmd: Could not initialise lsarpc. Error was NT_STATUS_ACCESS_DENIED
rpcclient $> enumprinters
do_cmd: Could not initialise spoolss. Error was NT_STATUS_ACCESS_DENIED
rpcclient $> querydominfo
do_cmd: Could not initialise samr. Error was NT_STATUS_ACCESS_DENIED
rpcclient $> netshareenumall
do_cmd: Could not initialise srvsvc. Error was NT_STATUS_ACCESS_DENIED
rpcclient $> dsroledominfo
do_cmd: Could not initialise dssetup. Error was NT_STATUS_ACCESS_DENIED
rpcclient $> lsaquery
do_cmd: Could not initialise lsarpc. Error was NT_STATUS_ACCESS_DENIED

While the target MSRPC server does allow null session, further enumeration requires a valid credential

impacket-rpcdump

┌──(kali㉿kali)-[~/PEN-200/PG_PRACTICE/internal_offsec]
└─$ impacket-rpcdump $IP                   
Impacket v0.12.0 - Copyright Fortra, LLC and its affiliated companies 
 
[*] Retrieving endpoint list from 192.168.136.40
Protocol: [MS-SAMR]: Security Account Manager (SAM) Remote Protocol 
Provider: samsrv.dll 
UUID    : 12345778-1234-ABCD-EF00-0123456789AC v1.0 
Bindings: 
          ncacn_ip_tcp:192.168.136.40[49158]
          ncalrpc:[samss lpc]
          ncalrpc:[dsrole]
          ncacn_np:\\INTERNAL[\PIPE\protected_storage]
          ncalrpc:[protected_storage]
          ncalrpc:[securityevent]
          ncalrpc:[audit]
          ncalrpc:[LRPC-b17d109b54286c66ac]
          ncacn_np:\\INTERNAL[\pipe\lsass]
 
Protocol: N/A 
Provider: sysntfy.dll 
UUID    : C9AC6DB5-82B7-4E55-AE8A-E464ED7B4277 v1.0 Impl friendly name
Bindings: 
          ncalrpc:[samss lpc]
          ncalrpc:[dsrole]
          ncacn_np:\\INTERNAL[\PIPE\protected_storage]
          ncalrpc:[protected_storage]
          ncalrpc:[securityevent]
          ncalrpc:[audit]
          ncalrpc:[LRPC-b17d109b54286c66ac]
          ncacn_np:\\INTERNAL[\pipe\lsass]
          ncalrpc:[LRPC-8900df446240f66dea]
          ncalrpc:[LRPC-a5e9eedeab56acffec]
          ncacn_np:\\INTERNAL[\PIPE\srvsvc]
          ncalrpc:[SECLOGON]
          ncacn_ip_tcp:192.168.136.40[49154]
          ncacn_np:\\INTERNAL[\PIPE\atsvc]
          ncalrpc:[OLE6EE189E6381A4A1BBCA35B9312D9]
          ncalrpc:[senssvc]
          ncalrpc:[IUserProfile2]
          ncalrpc:[senssvc]
          ncalrpc:[IUserProfile2]
          ncalrpc:[IUserProfile2]
 
Protocol: [MS-RSP]: Remote Shutdown Protocol 
Provider: wininit.exe 
UUID    : D95AFE70-A6D5-4259-822E-2C84DA1DDB0D v1.0 
Bindings: 
          ncacn_ip_tcp:192.168.136.40[49152]
          ncalrpc:[WindowsShutdown]
          ncacn_np:\\INTERNAL[\PIPE\InitShutdown]
          ncalrpc:[WMsgKRpc0BFE60]
 
Protocol: N/A 
Provider: winlogon.exe 
UUID    : 76F226C3-EC14-4325-8A99-6A46348418AF v1.0 
Bindings: 
          ncalrpc:[WindowsShutdown]
          ncacn_np:\\INTERNAL[\PIPE\InitShutdown]
          ncalrpc:[WMsgKRpc0BFE60]
          ncalrpc:[WMsgKRpc0BFE51]
 
Protocol: N/A 
Provider: dhcpcsvc6.dll 
UUID    : 3C4728C5-F0AB-448B-BDA1-6CE01EB0A6D6 v1.0 DHCPv6 Client LRPC Endpoint
Bindings: 
          ncalrpc:[dhcpcsvc6]
          ncalrpc:[dhcpcsvc]
          ncacn_ip_tcp:192.168.136.40[49153]
          ncacn_np:\\INTERNAL[\pipe\eventlog]
          ncalrpc:[eventlog]
 
Protocol: N/A 
Provider: dhcpcsvc.dll 
UUID    : 3C4728C5-F0AB-448B-BDA1-6CE01EB0A6D5 v1.0 DHCP Client LRPC Endpoint
Bindings: 
          ncalrpc:[dhcpcsvc]
          ncacn_ip_tcp:192.168.136.40[49153]
          ncacn_np:\\INTERNAL[\pipe\eventlog]
          ncalrpc:[eventlog]
 
Protocol: [MS-EVEN6]: EventLog Remoting Protocol 
Provider: wevtsvc.dll 
UUID    : F6BEAFF7-1E19-4FBB-9F8F-B89E2018337C v1.0 Event log TCPIP
Bindings: 
          ncacn_ip_tcp:192.168.136.40[49153]
          ncacn_np:\\INTERNAL[\pipe\eventlog]
          ncalrpc:[eventlog]
 
Protocol: N/A 
Provider: gpsvc.dll 
UUID    : 2EB08E3E-639F-4FBA-97B1-14F878961076 v1.0 
Bindings: 
          ncalrpc:[LRPC-a5e9eedeab56acffec]
 
Protocol: N/A 
Provider: certprop.dll 
UUID    : 30B044A5-A225-43F0-B3A4-E060DF91F9C1 v1.0 
Bindings: 
          ncacn_np:\\INTERNAL[\PIPE\srvsvc]
          ncalrpc:[SECLOGON]
          ncacn_ip_tcp:192.168.136.40[49154]
          ncacn_np:\\INTERNAL[\PIPE\atsvc]
          ncalrpc:[OLE6EE189E6381A4A1BBCA35B9312D9]
          ncalrpc:[senssvc]
          ncalrpc:[IUserProfile2]
 
Protocol: N/A 
Provider: IKEEXT.DLL 
UUID    : A398E520-D59A-4BDD-AA7A-3C1E0303A511 v1.0 IKE/Authip API
Bindings: 
          ncacn_ip_tcp:192.168.136.40[49154]
          ncacn_np:\\INTERNAL[\PIPE\atsvc]
          ncalrpc:[OLE6EE189E6381A4A1BBCA35B9312D9]
          ncalrpc:[senssvc]
          ncalrpc:[IUserProfile2]
 
Protocol: [MS-TSCH]: Task Scheduler Service Remoting Protocol 
Provider: schedsvc.dll 
UUID    : 86D35949-83C9-4044-B424-DB363231FD0C v1.0 
Bindings: 
          ncacn_ip_tcp:192.168.136.40[49154]
          ncacn_np:\\INTERNAL[\PIPE\atsvc]
          ncalrpc:[OLE6EE189E6381A4A1BBCA35B9312D9]
          ncalrpc:[senssvc]
          ncalrpc:[IUserProfile2]
 
Protocol: [MS-TSCH]: Task Scheduler Service Remoting Protocol 
Provider: taskcomp.dll 
UUID    : 378E52B0-C0A9-11CF-822D-00AA0051E40F v1.0 
Bindings: 
          ncacn_np:\\INTERNAL[\PIPE\atsvc]
          ncalrpc:[OLE6EE189E6381A4A1BBCA35B9312D9]
          ncalrpc:[senssvc]
          ncalrpc:[IUserProfile2]
 
Protocol: [MS-TSCH]: Task Scheduler Service Remoting Protocol 
Provider: taskcomp.dll 
UUID    : 1FF70682-0A51-30E8-076D-740BE8CEE98B v1.0 
Bindings: 
          ncacn_np:\\INTERNAL[\PIPE\atsvc]
          ncalrpc:[OLE6EE189E6381A4A1BBCA35B9312D9]
          ncalrpc:[senssvc]
          ncalrpc:[IUserProfile2]
 
Protocol: N/A 
Provider: schedsvc.dll 
UUID    : 0A74EF1C-41A4-4E06-83AE-DC74FB1CDD53 v1.0 
Bindings: 
          ncalrpc:[OLE6EE189E6381A4A1BBCA35B9312D9]
          ncalrpc:[senssvc]
          ncalrpc:[IUserProfile2]
 
Protocol: N/A 
Provider: authui.dll 
UUID    : 24019106-A203-4642-B88D-82DAE9158929 v1.0 
Bindings: 
          ncalrpc:[LRPC-87676a11886d64d55e]
 
Protocol: N/A 
Provider: nsisvc.dll 
UUID    : 7EA70BCF-48AF-4F6A-8968-6A440754D5FA v1.0 NSI server endpoint
Bindings: 
          ncalrpc:[LRPC-8aea6c8ad0986d06a5]
          ncalrpc:[OLE8E391BC9D6834CFEAE3FD01E794E]
 
Protocol: N/A 
Provider: MPSSVC.dll 
UUID    : 2FB92682-6599-42DC-AE13-BD2CA89BD11C v1.0 Fw APIs
Bindings: 
          ncalrpc:[LRPC-939d33d4f95a3a51e6]
 
Protocol: N/A 
Provider: MPSSVC.dll 
UUID    : 7F9D11BF-7FB9-436B-A812-B2D50C5D4C03 v1.0 Fw APIs
Bindings: 
          ncalrpc:[LRPC-939d33d4f95a3a51e6]
 
Protocol: N/A 
Provider: BFE.DLL 
UUID    : DD490425-5325-4565-B774-7E27D6C09C24 v1.0 Base Firewall Engine API
Bindings: 
          ncalrpc:[LRPC-939d33d4f95a3a51e6]
 
Protocol: N/A 
Provider: spoolsv.exe 
UUID    : 4A452661-8290-4B36-8FBE-7F4093A94978 v1.0 Spooler function endpoint
Bindings: 
          ncalrpc:[spoolss]
 
Protocol: [MS-PAN]: Print System Asynchronous Notification Protocol 
Provider: spoolsv.exe 
UUID    : AE33069B-A2A8-46EE-A235-DDFD339BE281 v1.0 Spooler base remote object endpoint
Bindings: 
          ncalrpc:[spoolss]
 
Protocol: [MS-PAN]: Print System Asynchronous Notification Protocol 
Provider: spoolsv.exe 
UUID    : 0B6EDBFA-4A24-4FC6-8A23-942B1ECA65D1 v1.0 Spooler function endpoint
Bindings: 
          ncalrpc:[spoolss]
 
Protocol: [MS-DNSP]: Domain Name Service (DNS) Server Management 
Provider: dns.exe 
UUID    : 50ABC2A4-574D-40B3-9D66-EE4FD5FBA076 v5.0 
Bindings: 
          ncacn_ip_tcp:192.168.136.40[49155]
 
Protocol: [MS-RPRN]: Print System Remote Protocol 
Provider: spoolsv.exe 
UUID    : 12345678-1234-ABCD-EF00-0123456789AB v1.0 IPSec Policy agent endpoint
Bindings: 
          ncalrpc:[LRPC-ae942532dcf6c343ae]
          ncacn_ip_tcp:192.168.136.40[49156]
 
Protocol: [MS-FASP]: Firewall and Advanced Security Protocol 
Provider: FwRemoteSvr.dll 
UUID    : 6B5BDD1E-528C-422C-AF8C-A4079BE4FE48 v1.0 Remote Fw APIs
Bindings: 
          ncacn_ip_tcp:192.168.136.40[49156]
 
Protocol: [MS-SCMR]: Service Control Manager Remote Protocol 
Provider: services.exe 
UUID    : 367ABB81-9844-35F1-AD32-98F038001003 v2.0 
Bindings: 
          ncacn_ip_tcp:192.168.136.40[49157]
 
Protocol: [MS-CMPO]: MSDTC Connection Manager: 
Provider: msdtcprx.dll 
UUID    : 906B0CE0-C70B-1067-B317-00DD010662DA v1.0 
Bindings: 
          ncalrpc:[LRPC-4e623439cd00a0beb7]
          ncalrpc:[OLE71780C69850B442CAD056056024C]
          ncalrpc:[LRPC-c25b83a6c9914f5d0c]
          ncalrpc:[LRPC-c25b83a6c9914f5d0c]
          ncalrpc:[LRPC-c25b83a6c9914f5d0c]
          ncalrpc:[LRPC-c25b83a6c9914f5d0c]
 
[*] Received 98 endpoints.

impacket-rpcdump discovered a total of 98 RPC endpoints spoolsv.exe is running dns.exe is also running for the DNS server on the target port 53

IOXIDResolver

┌──(kali㉿kali)-[~/PEN-200/PG_PRACTICE/internal_offsec]
└─$ IOXIDResolver -t $IP                                                                           
[*] Retrieving network interface of 192.168.136.40
Address: internal
Address: 192.168.136.40

N/A

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