WinVerifyTrust performance degradation

Issues related to VMProtect
Posts: 1
Joined: Tue Feb 25, 2020 10:02 am

WinVerifyTrust performance degradation

Postby stepmikhaylov » Tue Feb 25, 2020 11:17 am

Encountered degradation of execution time of WinVerifyTrust function calls.
VMProtect 3.0.9 is used.
WinVerifyTrust is used for checking signatures of CAB-files.

Memory/resources protection is applied and +100 binary files are included.
Memory/resources protection gives no difference versus unprotected version.
Including files increases execution time in 4-5 times.
Memory/resources protection and including files increases execution time in 10-15 times.

Site Admin
Posts: 1876
Joined: Mon Aug 21, 2006 8:19 pm
Location: Russia, E-burg

Re: WinVerifyTrust performance degradation

Postby Admin » Tue Mar 03, 2020 2:44 pm

We have no idea what happens inside WinVerifyTrust, because we are not autors of this API.