Troj/StartP-BY is a Trojan for the Windows platform.
Troj/StartP-BY is likely to be seen masquerading as a legitimate application (for example, trial version of some popular software). However, the installer includes malicious content which modifies the default homepage for Internet Explorer and Firefox browsers.
For Internet Explorer, the following Registry entry is made:
HKLM\SOFTWARE\Microsoft\Internet Explorer\Main\Start Page
http://www.[removed].com/
For Firefox, the prefs.js file within each of the Mozilla profiles on the computer, is modified to set the browser.startup.homepage option to the same URL.