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A [Relative Identifier (RID)](https://docs.microsoft.com/en-us/windows/security/identity-protection/access-control/security-identifiers) is a **unique identifier** (represented in hexadecimal format) utilized by Windows to **track and identify objects**. To explain how this fits in, let's look at the examples below:
* The [SID](https://docs.microsoft.com/en-us/windows/security/identity-protection/access-control/security-identifiers) for the NAME\_DOMAIN.LOCAL domain is: `S-1-5-21-1038751438-1834703946-36937684957`.
* When an object is created within a domain, the number above (SID) will be combined with a RID to make a unique value used to represent the object.
* So the domain user `john` with a RID:\[0x457] Hex 0x457 would = decimal `1111`, will have a full user SID of: `S-1-5-21-1038751438-1834703946-36937684957-1111`.
* This is unique to the `john` object in the NAME\_DOMAIN.LOCAL domain and you will never see this paired value tied to another object in this domain or any other.
Definition from [**here**](https://academy.hackthebox.com/module/143/section/1269).
**Pat of this section was extracted from book "**_**Network Security Assesment 3rd Edition**_**"**
You can use the Samba **`rpcclient`** utility to interact with **RPC endpoints via named pipes**. The following lists commands that you can issue to SAMR, LSARPC, and LSARPC-DS interfaces upon **establishing** a **SMB session** (often requiring credentials).
#### Server Info
* **Server Info**: `srvinfo`
#### Users enumeration
* **List users**: `querydispinfo` and `enumdomusers`
| lookupnames | LSARPC | Look up usernames to SID[a](https://learning.oreilly.com/library/view/network-security-assessment/9781491911044/ch08.html#ch08fn8) values |
| lookupsids | Look up SIDs to usernames (RID[b](https://learning.oreilly.com/library/view/network-security-assessment/9781491911044/ch08.html#ch08fn9) cycling) | |
| lsaaddacctrights | Add rights to a user account | |
| lsaremoveacctrights | Remove rights from a user account | |
| dsroledominfo | LSARPC-DS | Get primary domain information |
| dsenumdomtrusts | Enumerate trusted domains within an AD forest | |
To **understand** better how the tools _**samrdump**_**and**_**rpcdump**_ works you should read [**Pentesting MSRPC**](../135-pentesting-msrpc.md).
<details>
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