# 135, 593 - Pentesting MSRPC {% hint style="success" %} Learn & practice AWS Hacking:[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)\ Learn & practice GCP Hacking: [**HackTricks Training GCP Red Team Expert (GRTE)**](https://training.hacktricks.xyz/courses/grte)
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Join [**HackenProof Discord**](https://discord.com/invite/N3FrSbmwdy) server to communicate with experienced hackers and bug bounty hunters! **Hacking Insights**\ Engage with content that delves into the thrill and challenges of hacking **Real-Time Hack News**\ Keep up-to-date with fast-paced hacking world through real-time news and insights **Latest Announcements**\ Stay informed with the newest bug bounties launching and crucial platform updates **Join us on** [**Discord**](https://discord.com/invite/N3FrSbmwdy) and start collaborating with top hackers today! ## Basic Information Protokol Microsoft Remote Procedure Call (MSRPC), model klijent-server koji omogućava programu da zatraži uslugu od programa koji se nalazi na drugom računaru bez razumevanja specifičnosti mreže, prvobitno je izveden iz softvera otvorenog koda, a kasnije je razvijen i zaštićen autorskim pravima od strane Microsoft-a. RPC endpoint mapper može se pristupiti putem TCP i UDP porta 135, SMB na TCP 139 i 445 (sa null ili autentifikovanom sesijom), i kao web servis na TCP portu 593. ``` 135/tcp open msrpc Microsoft Windows RPC ``` ## Kako funkcioniše MSRPC? Iniciran od strane klijentske aplikacije, MSRPC proces uključuje pozivanje lokalne stub procedure koja zatim interaguje sa klijentskom runtime bibliotekom kako bi pripremila i prenela zahtev serveru. Ovo uključuje konvertovanje parametara u standardni format Network Data Representation. Izbor transportnog protokola određuje runtime biblioteka ako je server udaljen, osiguravajući da se RPC isporučuje kroz mrežni stek. ![https://0xffsec.com/handbook/images/msrpc.png](https://0xffsec.com/handbook/images/msrpc.png) ## **Identifikacija izloženih RPC usluga** Izloženost RPC usluga preko TCP, UDP, HTTP i SMB može se odrediti upitom RPC locator servisa i pojedinačnih krajnjih tačaka. Alati kao što je rpcdump olakšavaju identifikaciju jedinstvenih RPC usluga, označenih **IFID** vrednostima, otkrivajući detalje usluga i komunikacione veze: ``` D:\rpctools> rpcdump [-p port] **IFID**: 5a7b91f8-ff00-11d0-a9b2-00c04fb6e6fc version 1.0 Annotation: Messenger Service UUID: 00000000-0000-0000-0000-000000000000 Binding: ncadg_ip_udp:[1028] ``` Pristup RPC lokatorskoj usluzi omogućen je putem specifičnih protokola: ncacn\_ip\_tcp i ncadg\_ip\_udp za pristup preko porta 135, ncacn\_np za SMB veze, i ncacn\_http za web-baziranu RPC komunikaciju. Sledeće komande ilustruju korišćenje Metasploit modula za audite i interakciju sa MSRPC uslugama, prvenstveno fokusirajući se na port 135: ```bash use auxiliary/scanner/dcerpc/endpoint_mapper use auxiliary/scanner/dcerpc/hidden use auxiliary/scanner/dcerpc/management use auxiliary/scanner/dcerpc/tcp_dcerpc_auditor rpcdump.py -p 135 ``` All options except `tcp_dcerpc_auditor` are specifically designed for targeting MSRPC on port 135. #### Notable RPC interfaces * **IFID**: 12345778-1234-abcd-ef00-0123456789ab * **Named Pipe**: `\pipe\lsarpc` * **Description**: LSA interfejs, koristi se za enumeraciju korisnika. * **IFID**: 3919286a-b10c-11d0-9ba8-00c04fd92ef5 * **Named Pipe**: `\pipe\lsarpc` * **Description**: LSA interfejs za usluge direktorijuma (DS), koristi se za enumeraciju domena i odnosa poverenja. * **IFID**: 12345778-1234-abcd-ef00-0123456789ac * **Named Pipe**: `\pipe\samr` * **Description**: LSA SAMR interfejs, koristi se za pristup javnim elementima SAM baze podataka (npr. korisnička imena) i brute-force napade na lozinke korisnika bez obzira na politiku zaključavanja naloga. * **IFID**: 1ff70682-0a51-30e8-076d-740be8cee98b * **Named Pipe**: `\pipe\atsvc` * **Description**: Planer zadataka, koristi se za daljinsko izvršavanje komandi. * **IFID**: 338cd001-2244-31f1-aaaa-900038001003 * **Named Pipe**: `\pipe\winreg` * **Description**: Usluga daljinskog registra, koristi se za pristup i modifikaciju sistemskog registra. * **IFID**: 367abb81-9844-35f1-ad32-98f038001003 * **Named Pipe**: `\pipe\svcctl` * **Description**: Menadžer kontrole usluga i server usluga, koristi se za daljinsko pokretanje i zaustavljanje usluga i izvršavanje komandi. * **IFID**: 4b324fc8-1670-01d3-1278-5a47bf6ee188 * **Named Pipe**: `\pipe\srvsvc` * **Description**: Menadžer kontrole usluga i server usluga, koristi se za daljinsko pokretanje i zaustavljanje usluga i izvršavanje komandi. * **IFID**: 4d9f4ab8-7d1c-11cf-861e-0020af6e7c57 * **Named Pipe**: `\pipe\epmapper` * **Description**: DCOM interfejs, koristi se za brute-force napade na lozinke i prikupljanje informacija putem WM. ### Identifying IP addresses 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). ### Executing a RCE with valid credentials 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** * ShellWindows * ShellBrowserWindow * MMC20 ## Port 593 The **rpcdump.exe** from [rpctools](https://resources.oreilly.com/examples/9780596510305/tree/master/tools/rpctools) can interact with this port. ## References * [https://www.cyber.airbus.com/the-oxid-resolver-part-1-remote-enumeration-of-network-interfaces-without-any-authentication/](https://www.cyber.airbus.com/the-oxid-resolver-part-1-remote-enumeration-of-network-interfaces-without-any-authentication/) * [https://www.cyber.airbus.com/the-oxid-resolver-part-2-accessing-a-remote-object-inside-dcom/](https://www.cyber.airbus.com/the-oxid-resolver-part-2-accessing-a-remote-object-inside-dcom/) * [https://0xffsec.com/handbook/services/msrpc/](https://0xffsec.com/handbook/services/msrpc/)
Join [**HackenProof Discord**](https://discord.com/invite/N3FrSbmwdy) server to communicate with experienced hackers and bug bounty hunters! **Hacking Insights**\ Engage with content that delves into the thrill and challenges of hacking **Real-Time Hack News**\ Keep up-to-date with fast-paced hacking world through real-time news and insights **Latest Announcements**\ Stay informed with the newest bug bounties launching and crucial platform updates **Join us on** [**Discord**](https://discord.com/invite/N3FrSbmwdy) and start collaborating with top hackers today! {% hint style="success" %} Learn & practice AWS Hacking:[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)\ Learn & practice GCP Hacking: [**HackTricks Training GCP Red Team Expert (GRTE)**](https://training.hacktricks.xyz/courses/grte)
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