It wasn't necessarily sent to a site... It could have been just some hacker sending coins to their own wallet... In any case, about all you can do is try Google searching the address and see if it pops up in a result... Looking an address with a person/site is not usually a trivial task.
Have you scanned your PC for Trojans/viruses/malware? Some decent scanners are: MalwareBytes, Spybot Search and Destroy
Don't forget that the time you see on a block explorer will be the time The transaction was confirmed, not necessarily when it was initially sent, so it may be a transaction that took some time to confirm.
Topic: Am I vulnerable to a hack if I forgot to upgrade my wallet? (Read 265 times)
Earlier versions were safe. Your release is not that old.
This is turning out to be very strange, because I'm sure I was not awake when this transaction took place. Is there anyway of identifying the site it was sent to by looking at the address?
The only free wallet explorer to the public is walletexporer.com. You can see the address there but nothing to identify it. Also the bitcoin has already moved.
Earlier versions were safe. Your release is not that old.
This is turning out to be very strange, because I'm sure I was not awake when this transaction took place. Is there anyway of identifying the site it was sent to by looking at the address?
Earlier versions were safe. Your release is not that old.
I am running Electrum 2.5.4 , I had forgotten to upgrade, now my BTC is missing from my wallet. 
Could this be the reason? Or the earlier versions were safe too?
Could this be the reason? Or the earlier versions were safe too?
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