immSignSrch is a signatures scanner plugin for Immunity Debugger developed upon Luigi Auriemma's signSrch ( diff ).
Fast search engine
It can recognize:
tons of compression, multimedia and encryption algorithms
many other things (like known strings and anti-debugging code)
Signatures DB automatically updatable from the program itself and editable by hand
From the command line ( ALT + F1 ) type: !iss -h