This is part of the Sendori web browser toolbar and extension that will modify the browser's default search provider, DNS, and home page functions. nssckbi.dll is the Mozilla Network Security Services (NSS) library that provides access to a list of trusted root CA certificates that are distributed with Mozilla software and is recompiled by Sendori, Inc. The module nssckbi.dll, “NSS Builtin Trusted Root CAs” by Sendori, Inc has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. Although a detection has been made for this resource, it is generally a commonly distributed 3rd-party library and is typically safe by itself.