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Security

UCPD.sys – UserChoice Protection Driver Part 2

July 15, 2025 admin 0

In my previous blog post, I explained the functionality of the UCPD.sys driver when it was at version 2.1. Since then, Microsoft has updated the […]

UserChoiceLatest – Microsoft’s new protection for file type associations

April 20, 2025 admin 2

When I wrote the article about UCPD.sys, I had already noticed the references to the UserChoiceLatest registry key, and in earlier versions, even to UserChoicePrevious. […]

UserChoice Protection Driver – UCPD.sys

April 3, 2024 admin 7

UPDATE 05.10.2024: Microsoft has updated UCPD.sys multiple times since my initial blog post. The current version is 3.1, and it blocks the following executables from […]

SetDefaultBrowser – Set the Default Browser per command line or script

November 10, 2017 admin 227

UPDATE 05.03.2024 – SetDefaultBrowser will not be maintained anymore. its functionality will be integrated into SetUserFTA 2.0 ATTENTION: if SetDefaultBrowser does not work anymore after […]

SetUserFTA: UserChoice Hash defeated – Set File Type Associations per User or Group on Windows 8/10/11 and 2012/2016/2019/2022

October 25, 2017 admin 320

SetUserFTA has now its own domain: https://setuserfta.com and this page will only remain for historical reasons. SetUserFTA sets User File Type Associations per command line […]

Citrix Receiver Unblock – Jailbreak Detection Analysis and Bypass

October 12, 2017 admin 0

im a jailbreaker. whatever device. PS3, PSVita, iPhone, iPad, Apple TV, etc. why? because i payed for the device and i want to do what […]

Re-enable Browser Password Saving (autofill, autocomplete) on Netscaler Gateway 11.1

March 22, 2017 admin 0

when you update your netscaler to 11.1, you might notice, that the password saving option from browsers no longer works (most likely because of this issue: http://thehackernews.com/2017/01/browser-autofill-phishing.html). a […]

Netscaler Endpoint Analyse (EPA) Pre-Authentication bypassing!

May 30, 2015 admin 0

UPDATE: bypassing the EPA scan with this method is only possible when using the Netscaler default settings. read the update at the end of this […]

Fingerprinting, Netscaler Gateway Version information leaking

May 26, 2015 admin 3

recently i wanted to know the running version from a remote Netscaler Gateway – but i didnt have an admin login or any other access to […]

about the author

Hi - I am Christoph Kolbicz and im IT-Consultant at AXACOM AG in Switzerland. Most of my projects are about Citrix and Microsoft, but i like Security topics and sometimes i do some programming and Reverse Engineering.



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I am Microsoft Certified Solution Expert (including Exchange) and Citrix Certified Expert - Virtualization and Networking. I hold 30 Microsoft MCP and 20+ Citrix CCA certifications - to many to list them here - and i am eidg. Dipl. Inf. HF.

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Categories

  • Citrix
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  • Security
  • Uncategorized
  • VMware
  • Windows
  • XenApp

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