Scan suspicious file hashes with Team Cymru's online service or Firefox extension

[MrBrian]

http://hash.cymru.com/index.html
https://addons.mozilla.org/en-US/firefox/addon/98431/

Some other online services that also access Team Cymru's database:
http://isc.sans.edu/tools/hashsearch.html
https://www.vicheck.ca/md5query.php

[CloneRanger]

Ooh an edit ;)

Nice :thumb: and they have some other useful tools on there too - https://www.vicheck.ca/tools.php