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About Virtualization, VDI, SBC, Application Compatibility and anything else I feel like
22 May // php the_time('Y') ?>
Yesterday I was working with an Excel document that contained Combobox form controls.
I wanted to count the number of cells containing a particular value using the COUNTIF formula. However the count returned 0 because the LinkedCell property of the Combobox was not set to the Cell that contained the Combobox.
To set the LinkedCell Ctrl-Click the Combobox to select it, right-click and select Format Control. Then set the correct Cell in the Cell link field:
My sheet contained about 150 Comboboxes, so obviously I was going to do this using a script. I couldn’t find anything useful with Google so I wrote my own Macro.
8 Jun // php the_time('Y') ?>
I was just browsing through the Options tab in Excel 2010 when I noticed the following setting:
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.
20 Feb // php the_time('Y') ?>
Environment
Windows 2003 Enterprise (32 bit), Citrix XenApp 5, RES Workspace Manager 2011, McAfee VirusScan Enterprise 8.7.0i.
Problem
When a opening an Excel workbook from Sharepoint the whole session freezes.
I asked the user to open an Excel workbook from Sharepoint and I noticed the following popup:
So my first thought was that the user somehow clicked this message to the background and IE was waiting for a response.
12 Feb // php the_time('Y') ?>
Recently I published a Proof of Concept that showed it was possible to launch unauthorized processes with both AppSense Application Manager and RES Workspace Manager.
Although I didn’t test Microsoft Applocker I have no doubt at all that we couldn’t bypass it.
I have named my Proof of Concept the XLSploit because I am using Excel as a trampoline. I choose Excel because this is generally a trusted process and VBA offers access to the Windows API that is needed.
After publishing the XLSploit I have talked to both RES and AppSense and not that they both have a response to my Proof of Concept, I consider it safe to tell a little more about how it works.
If you are merely interested in stopping the XLSploit, please scroll down to the end of the article.