Services can cause serious vulnerabilities in desktop and laptop systems. The following intro is from a ZDNet tutorial that describes service. Windows service hardening is built around the concept of the principle of least privilege. Working in conjunction with other new security mechanisms, such as User.
I am pretty impressed with the changes and new features for good old NT Services in Vista/Server 2008. My favourite feature is, that every service can now have a distinct SID that can be used to ACL kernel objects. Imagine you have to deploy a bunch of services that have to be isolated from each other. Pre-Vista you would have to create an account for each service.
Now you can simply use the new NT ServiceServiceName SID to control authorization. Even better the SIDs for services are deterministic across machines (S-1-5-80-SHA1(Servicename) to be exact), and you can also pre-calculate the SID even when the service doesn’t exist yet: sc showsid FooService This makes it very easy in server farms to copy data.and. ACLs (e.g. Using robocopy) between nodes Additionally you can write-restrict the service tokens – that means that the service won’t have write access to any kernel object unless the service SID is explicitly part of the ACL. Other nice features are that services no longer share the same desktop with interactive users and that you can bundle network access rules with services. These rules are independent from the Windows firewall and would even work if the firewall is disabled.
Nice least privilege work, guys! Has written a series of blog posts about the new features (recommended reading):.
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With the aim to make Windows Vista an operating system which is –. 'Secure by Design'. 'Secure by Default',. 'Secure by Deployment' One of the major concerns was making the services running on the Windows Systems secure. But in order to make these services secure, we needed to know what made these services a security threat for the Windows systems. Windows Services – Formerly called NT services are actually long-running executable applications that run in their separate Windows sessions, can be started when the OS starts, can be stopped and restarted. They mostly remain hidden in the background and do not open any interface for the user.
Majka serial. Many of these services run under elevated privilege accounts, and some even have the access to the network. These are some of the properties of Windows services that make them the most attractive targets of malware attacks like Sasser, Blaster etc. A few years back in 2003 when Bill Gates announced Microsoft’s focus on Trustworthy Computing, Windows XP had already been released by that time. But the introduction of Windows XP SP2, did bring about significant changes related to security in the Operating System, but the basic engineering around security could not really be changed. So in order to really increase the security around these services and the way they functioned, Microsoft did four main things as a part of its Trustworthy Computing Initiative:. Assigning Least Privilege Access to the services for the objects they need to access. Service Isolation.
Restricting Network Access for many of the services. Session 0 Isolation Ok, now lets see first how these services traditionally worked in Windows XP. Many services in Windows XP run under the Local System account, which is like an administrator account for the services. Since this is a high privilege account, so if a service using this account gets infected to compromised, the attack has the ability to bring about a larger extent of damage to the system since the account it using inherently has much wider access to system resources. Many of the services in Windows XP are network-facing (whether its needed by them or not). So many attacks happen by making incoming calls to these services and making them to make legitimate outgoing calls to other systems thereby affecting many other systems in the network e.g.
Sending out the keystrokes to a designated server on the internet. Most of the services usually run at startup, and shut down only when the system shuts down. This gives plenty of time for the malware to explore the security flaws in them and more time to do extensive damage. Subcribe to this Blog by E-mail Enter your email address to subscribe to this blog and receive notifications of new posts by email.
Blast from the past. Came across my old documents and realized that I have been certified for 20 years. Playing around with Google cloud.
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