Request header
POST /login.aspx?ReturnUrl=%2f HTTP/1.1
Text View
Below is what gets me into the webpage.
__EVENTTARGET=&__EVENTARGUMENT=&__VIEWSTATE=%2FwEPDwUJMzIxMjI5MTcyD2QWAgIBD2QWAgIBDxYGHgRocmVmBSdBcHBfVGhlbWVzLzIwMDgvTWFzdGVyQWxsU3R5bGVTaGVldC5jc3MeBHR5cGUFCHRleHQvY3NzHgNyZWwFCnN0eWxlc2hlZXRkZHoU5PbFayHeS3YXna6AC3KkcHrCpXtzLfgNlq23FQjJ&__EVENTVALIDATION=%2FwEWBAK9wNu%2BBwLG%2BZuPDwK238z2DgLEg7eLCwzMmipeemHJGihtGgBvgaxvjdWcM25DHKW7ZpZcGPV0&loginControl%24UserName=fakeuser&loginControl%24Password=fakepassword&loginControl%24LoginButton=Log+In