HTA module hta_url

There may be an issue with the `hta_url` variable in the HTA PowerShell module. Refer to:

* https://medium.com/@bluedenkare/1-click-meterpreter-exploit-chain-with-beef-and-av-amsi-bypass-96b0eb61f1b6

Start by locating the HTA PowerShell module and the hta_url variable, then compare its behavior with the linked Meterpreter exploit-chain report. Reproduce the reported behavior if possible; done means confirming the issue and identifying the specific correction or documenting that it cannot be reproduced.

Written by the indexing model from the issue text.