What is LSA authentication?

What is LSA authentication?

LSA Authentication describes the parts of the Local Security Authority (LSA) that applications can use to authenticate and log users on to the local system. It also describes how to create and call authentication packages and security packages.

What is LSA in Windows Registry?

LSA secrets is a special protected storage for important data used by the Local Security Authority (LSA) in Windows. LSA is designed for managing a system’s local security policy, auditing, authenticating, logging users on to the system, storing private data. Users’ and system’s sensitive data is stored in secrets.

How does Windows local authentication work?

Windows-based authentication is manipulated between the Windows server and the client machine. This authentication is done by IIS. It first accepts user’s credentials from the domain login “Domain\UserName and Password”. If this process fails then IIS displays an error and asks to re-enter the login information.

What is an LSA provider?

The Local Security Authority (LSA) authentication model has the following features: The LSA supports custom security packages, which function as security support providers for distributed applications and as authentication packages for applications that require authentication services.

Why do we require Sam and LSA?

The Local Security Authority (LSA) is responsible for managing interactive logons to the system. The SAM compares the user’s credentials with the account information in the SAM database to determine whether the user is authorized to access the system.

Why do we require Sam and LSA in kernel?

To provide heterogeneous local authentication. Not everyone can take advantage of the Active Directory authentication and logon process, and not everyone wants to. The LSA thus provides these “users” (processes) with a local logon facility that they were accustomed to, or built for, on Windows NT 4.0 and earlier.

How are LSA secrets stored?

LSA secrets are stored in the registry at HKEY_LOCAL_MACHINE\SECURITY\Policy\Secrets . LSA secrets can also be dumped from memory. Reg can be used to extract from the Registry. Mimikatz can be used to extract secrets from memory.

How do I enable LSA?

How to Enable LSA Protection (RunAsPPL)

1. open the Registry Editor ( regedit.exe ) as an Administrator;
2. open the key HKLM\SYSTEM\CurrentControlSet\Control\Lsa ;
3. add the DWORD value RunAsPPL and set it to 1 ;
4. reboot.

What is LSA memory?

LSA (Local Security Authority) is a subsystem related to Windows security. It manages user rights information and stores password hash etc. in the memory. In OS including Windows 8.1 and others, LSA Protection Mode serves to protect such information from being stolen.

How does LSA authentication on Windows XP work?

In both cases, on XP those credentials pass through the LSA client and its server. At the backend, then, LSA must determine “who to ask” to determine if the credentials are indeed valid. That’s where the “negotiate” block comes in – which will do one of two things:

Why do we need the LSA in Windows 10?

The LSA supports heterogeneous credentials management to interface with non-Microsoft products, such as networks and databases. Because such products often have their own security credentials, the LSA provides functions that authentication packages can use to associate non-Microsoft credentials with Windows processes.

Why does LSASS store credentials in the memory?

According to Microsoft documentation, LSASS stores credentials in memory on behalf of users with active Windows sessions. The purpose of storing these credentials is so that users can access network resources, file shares, mail, and more without having to re-authenticate to each individual service. What types of credentials does LSASS store?

What does LSASS do to a DLL?

Each DLL handles a different form of authentication and are utilized by the overarching LSASS process. I’ll start with breaking down LSASS as it is generally the most well-known component of LSA. According to Microsoft documentation, LSASS stores credentials in memory on behalf of users with active Windows sessions.