<summary><strong>Learn AWS hacking from zero to hero with</strong><ahref="https://training.hacktricks.xyz/courses/arte"><strong>htARTE (HackTricks AWS Red Team Expert)</strong></a><strong>!</strong></summary>
* If you want to see your **company advertised in HackTricks** or **download HackTricks in PDF** Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@carlospolopm**](https://twitter.com/hacktricks\_live)**.**
* **Share your hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
The Microsoft Remote Procedure Call (MSRPC) protocol, a client-server model enabling a program to request a service from a program located on another computer without understanding the network's specifics, was initially derived from open-source software and later developed and copyrighted by Microsoft.
The RPC endpoint mapper can be accessed via TCP and UDP port 135, SMB on TCP 139 and 445 (with a null or authenticated session), and as a web service on TCP port 593.
Initiated by the client application, the MSRPC process involves calling a local stub procedure that then interacts with the client runtime library to prepare and transmit the request to the server. This includes converting parameters into a standard Network Data Representation format. The choice of transport protocol is determined by the runtime library if the server is remote, ensuring the RPC is delivered through the network stack.
Exposure of RPC services across TCP, UDP, HTTP, and SMB can be determined by querying the RPC locator service and individual endpoints. Tools such as rpcdump facilitate the identification of unique RPC services, denoted by **IFID** values, revealing service details and communication bindings:
Access to the RPC locator service is enabled through specific protocols: ncacn\_ip\_tcp and ncadg\_ip\_udp for accessing via port 135, ncacn\_np for SMB connections, and ncacn\_http for web-based RPC communication. The following commands exemplify the utilization of Metasploit modules to audit and interact with MSRPC services, primarily focusing on port 135:
* **Description**: LSA interface, used to enumerate users.
* **IFID**: 3919286a-b10c-11d0-9ba8-00c04fd92ef5
* **Named Pipe**: `\pipe\lsarpc`
* **Description**: LSA Directory Services (DS) interface, used to enumerate domains and trust relationships.
* **IFID**: 12345778-1234-abcd-ef00-0123456789ac
* **Named Pipe**: `\pipe\samr`
* **Description**: LSA SAMR interface, used to access public SAM database elements (e.g., usernames) and brute-force user passwords regardless of account lockout policy.
* **IFID**: 1ff70682-0a51-30e8-076d-740be8cee98b
* **Named Pipe**: `\pipe\atsvc`
* **Description**: Task scheduler, used to remotely execute commands.
* **IFID**: 338cd001-2244-31f1-aaaa-900038001003
* **Named Pipe**: `\pipe\winreg`
* **Description**: Remote registry service, used to access and modify the system registry.
* **IFID**: 367abb81-9844-35f1-ad32-98f038001003
* **Named Pipe**: `\pipe\svcctl`
* **Description**: Service control manager and server services, used to remotely start and stop services and execute commands.
* **IFID**: 4b324fc8-1670-01d3-1278-5a47bf6ee188
* **Named Pipe**: `\pipe\srvsvc`
* **Description**: Service control manager and server services, used to remotely start and stop services and execute commands.
* **IFID**: 4d9f4ab8-7d1c-11cf-861e-0020af6e7c57
* **Named Pipe**: `\pipe\epmapper`
* **Description**: DCOM interface, used for brute-force password grinding and information gathering via WM.
Using [https://github.com/mubix/IOXIDResolver](https://github.com/mubix/IOXIDResolver), comes from [Airbus research](https://www.cyber.airbus.com/the-oxid-resolver-part-1-remote-enumeration-of-network-interfaces-without-any-authentication/) is possible to abuse the _**ServerAlive2**_ method inside the _**IOXIDResolver**_ interface.
This method has been used to get interface information as **IPv6** address from the HTB box _APT_. See [here](https://0xdf.gitlab.io/2021/04/10/htb-apt.html) for 0xdf APT writeup, it includes an alternative method using rpcmap.py from [Impacket](https://github.com/SecureAuthCorp/impacket/) with _stringbinding_ (see above).
It is possible to execute remote code on a machine, if the credentials of a valid user are available using [dcomexec.py](https://github.com/fortra/impacket/blob/master/examples/dcomexec.py) from impacket framework.
**Remember to try with the different objects available**
<summary><strong>Learn AWS hacking from zero to hero with</strong><ahref="https://training.hacktricks.xyz/courses/arte"><strong>htARTE (HackTricks AWS Red Team Expert)</strong></a><strong>!</strong></summary>
* If you want to see your **company advertised in HackTricks** or **download HackTricks in PDF** Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@carlospolopm**](https://twitter.com/hacktricks\_live)**.**
* **Share your hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
