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Changing content of a signed .exe

Posted on 2011-03-08
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Last Modified: 2012-05-11
We build our product from C and Asm source files, and ship all our .exe and .dll files signed with Authenticode.  In the past (before we starting signing our files), our customers could use a tool like ResHacker or Resource Tuner to change the app icon -- the icon that shows in Windows Explorer for an .exe file -- to something they like better than our icon.

The question now is how to support this capability in Authenticode signed file?  Or is it simply impossible?

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Question by:vas803
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Toxacon earned 2000 total points
ID: 35086602
If you modify the signed executable in any way, it will break the signing. One of the purposes of Authenticode is to protect software from any alteration.
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by:vas803
ID: 35086793
Thanks.  Yes, that was my understanding but I wanted to make double sure before telling my customer that they were out of luck.
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