AppLocker

In this article, we will explore in depth AppLocker and its impact on our contemporary society. AppLocker has been the subject of study and interest over the years, and its relevance has not diminished over time. Through a comprehensive analysis, we will examine the different aspects and facets of AppLocker, from its origins to its role in today's world. We will delve into its meaning, its implications and its influence in various spheres, as well as its relevance to the general public. Through this exploration, we hope to provide a more complete and enriching view of AppLocker, in order to better understand its importance and implications for the world in which we live.

AppLocker is an application whitelisting technology introduced with Microsoft's Windows 7 operating system. It allows restricting which programs users can execute based on the program's path, publisher, or hash,[1] and in an enterprise can be configured via Group Policy.

Summary

Windows AppLocker allows administrators to control which executable files are denied or allowed to execute. With AppLocker, administrators are able to create rules based on file names, publishers or file location that will allow certain files to execute. Unlike the earlier Software Restriction Policies, which was originally available for Windows XP and Windows Server 2003,[2] AppLocker rules can apply to individuals or groups. Policies are used to group users into different enforcement levels. For example, some users can be added to an 'audit' policy that will allow administrators to see the rule violations before moving that user to a higher enforcement level.

AppLocker availability charts

AppLocker availability on Windows 7[3]
Starter Home Basic Home Premium Professional Enterprise Ultimate
No No No Create policies, but cannot enforce Create and enforce policies Create and enforce policies
AppLocker availability on Windows 8[4]
RT (Core) Pro Enterprise
No No No Yes
AppLocker availability on Windows 10[5][6][7]
Home Pro Enterprise Education
Yes Yes Yes Yes

Bypass techniques

There are several generic techniques for bypassing AppLocker:

  • Writing an unapproved program to a whitelisted location.
  • Using a whitelisted program as a delegate to launch an unapproved program.[8][9][10][11]
  • Hijacking the DLLs loaded by a trusted application in an untrusted directory.[12]

References

  1. ^ "AppLocker". Microsoft TechNet. Microsoft. Retrieved 23 August 2012.
  2. ^ "Using Software Restriction Policies to Protect Against Unauthorized Software". Microsoft TechNet. Microsoft. 11 September 2009. Retrieved 27 July 2017.
  3. ^ "Windows Versions That Support AppLocker". Microsoft. 17 November 2009. Retrieved 27 July 2017.
  4. ^ Visser, Erwin (18 April 2012). "Introducing Windows 8 Enterprise and Enhanced Software Assurance for Today's Modern Workforce". Windows for your Business. Microsoft. Archived from the original on 25 December 2012. Retrieved 22 November 2012.
  5. ^ Dudau, Vlad (10 June 2015). "Microsoft shows OEMs how to market Windows 10; talks features and SKUs". Neowin. Neowin LLC. Retrieved 19 June 2015.
  6. ^ "Find out which Windows is right for you". Microsoft. Microsoft Inc. Retrieved 2 July 2015.
  7. ^ "Removal of Windows edition checks for AppLocker". Microsoft. Microsoft Inc. Retrieved 22 February 2023.
  8. ^ "AppLocker Bypass – InstallUtil". Penetration Testing Lab. 8 May 2017. Retrieved 27 July 2017.
  9. ^ "AppLocker Bypass Techniques". Evi1cg's blog. 12 September 2016. Retrieved 27 July 2017.
  10. ^ "How to Bypass Windows AppLocker". Hacking Tutorial. 19 April 2017. Retrieved 27 July 2017.
  11. ^ "caseysmithrc/gethelp.cs". Github Gist. Archived from the original on 14 May 2019. Retrieved 14 May 2019.
  12. ^ "Bypassing Application Whitelisting". CERT/CC Blog. 29 June 2016. Retrieved 27 July 2017.