Retrieve signature information

[iadgovuser1]

Retrieve signature information for pe files. Need to handle embedded signatures and files that are catalog signed. Some random links:

• http://www.exploit-monday.com/2017/08/application-of-authenticode-signatures.html
• https://blog.didierstevens.com/2008/01/11/the-case-of-the-missing-digital-signatures-tab/
• https://stackoverflow.com/questions/16818281/how-does-windows-link-a-pe-file-to-its-signature-in-a-catalog-file
• https://blog.didierstevens.com/programs/disitool/
• https://blog.didierstevens.com/programs/authenticode-tools/
• https://pypi.org/project/signify/

[iadgovuser1]

Could also call powershell.exe with a script block that parses the certificate and outputs JSON to the console.

[iadgovuser8]

25f2f7a should minimally meet this enhancement. This component could be expanded further in the future. Leaving this issue open as it is an open-ended component.