Intercepting web traffic locally
Well, You can intercept and view traffic between your PC and any remote IP using Wireshark.
For the problem of browser hijacking, the malware must have a running process that is injecting the codes, scan your PC for malwares. Use something like MalwareBytes. To scan, first boot to safe mode, then run the program.
You can also use HijackThis to inspect the running processes. and then analyze them at their site. See if that helps. Run HijackThis in normal mode. not safe mode.