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. nssutil3.dll is the Mozilla Network Security Services Utility library is designed to support cross-platform development of security-enabled client and server applications. It provides a complete open-source implementation of the crypto libraries used by Netscape and other companies and is recompiled by Sendori, Inc. The library nssutil3.dll, “NSS Utility Library” by Sendori, Inc has been known to be a potentially unwanted program that has been detected by 1 anti-malware scanner. Note, this is a common distributed file and although it has been detected it might not be a threat is un-coupled from its distribution source.