Just scanned the official Litecoin client and got the same false positive.
Miners were often used inside other apps and the report says its a miner.
Yes: its a miner. We are here at Bitcointalk.
Use the sourcecode and compile it on your machine if you want.
Send the file for an analysis to a laboratory there is no virus inside.
I checked it again with Kaspersky and Avira and you can check it by your own its just a false positive.