About Virtualization, VDI, SBC, Application Compatibility and anything else I feel like
Today I was asked to troubleshoot an executable that didn’t work correctly on Windows XP Embedded.
On startup it displayed the following message:
Unhandled Exception: System.IO.FileNotFoundException: Could not load file or ass
embly 'System.Configuration, Version=188.8.131.52, Culture=neutral, PublicKeyToken=b0
3f5f7f11d50a3a' or one of its dependencies. The system cannot find the path spec
File name: 'System.Configuration, Version=184.108.40.206, Culture=neutral, PublicKeyTok
en=b03f5f7f11d50a3a' ---> System.IO.DirectoryNotFoundException: The system canno
t find the path specified. (Exception from HRESULT: 0x80070003)
I verified that System.Configuration.dll was present (in C:\Windows\Microsoft.NET\Framework\v2.0.50727).
This feature was introduced in Excel 2007.
In the default settings, multi-threaded calculation is Enabled with "Use all processors on this computer".
On a physical desktop this would be the preferred setting since it will make formula calculation as fast as possible.
The video shows a method, discovered by Denis Gundarev to obtain the IMA Datastore password. Basically he uses DSMaint.exe and set’s a breakpoint on the call to CryptUnprotectData and then reads the password from memory.
I tried to call the CryptUnprotectData API with the data read from the registry directly but this failed with error NTE_BAD_KEY_STATE, this is defined in winerror.h and it means “Key not valid for use in specified state”.
Just a small post today: a small commandline utility that reads the “DefaultPassword” LSA secret.
This secret is stored in the registry under the SECURITY Hive:
After figuring out how to encode and decode the Citrix passwords my next step for the upcoming Citrix Launcher is experiment with config.xml and authenticating to the Citrix Web Interface.
To create an authentication packet I use the following code:
I am working on a launcher tool for Citrix XenApp that can not only connect to a published application or published desktop but can also leverage Citrix Workspace Control to reconnect to disconnected and/or active sessions.
There doesn’t seem to be any sdk that exposed the data we need so I am trying to reproduce what the Citrix online plugi-in does.
I used a HTTP monitoring tool to capture the traffic between the Online plug-in and the Web Interface. First the online plug-in will retrieve the config.xml from the server specified via the Change Server option:
For a research project I tried to install Windows NT 4 Terminal Server on VMWare Workstation (version 8).
The setup would always fail however with the following error:
Obviously the installation doesn’t really fail because of too little memory and neither is the installation disc (an iso file) corrupt, it’s a bug.
I needed to dome some Bit Shifting in PowerShell but unfortunately PowerShell lacks operator for Bit Shifting. I searched the .NET Framework for anything that allows for bit shifting but was unable to find anything suitable.
I didn’t want to revert to C# so I implemented shift left and shift right functions in PowerShell.
The code isn’t really pretty and could probably be improved (comments/improvements are welcome!) but here goes (please note that I implemented for bit shifting a byte):
A user reported that the following error while visiting a website on a Citrix XenApp server:
I tried adding the site to the Trusted Sites List and adding the url to the Per Site Privacy list:
But this didn’t work, but I noticed that the site was “flickering” a lot so I suspected that HDX Flash Acceleration was the problem.
I needed to login as root on a Linux based virtual appliance to do some troubleshooting. In my case the appliance was running Suse Linux Enterprise.
I booted the VA using the Ubuntu Live CD and opened a Terminal. Then I used the cfdisk tool (sudo cfdisk /dev/sda) to view the partitions:
.NET .NET FrameWork Active Directory Altiris Apple Automation Manager Citrix Dell Delphi Excel Exchange Exchange2003 Exchange2010 Hack HP iOS Java LinkedIn Linux Lync MSI Office Office 2010 Passat Password PowerPoint PowerShell RES RNS510 SasLibEx SCOM Security Terminal Server ThinApp TSAdminEx VBS VCDS Visual Basic Visual Studio VMWare Volkswagen VW Windows PE Wordpress XenApp