Actually the hacker, first hacked my email and then sent forgot my password to all the exchanges I trade with.
Once he got the password reset, he basically sold all my altcoins to BTC and then transferred them to his wallet.
He also deleted all the email confirmations from the mail inbox.
I actually noticed the unable to login with poloniex couple of times, but since poloniex was wobbly at that time, i thought it was a server issue.
Altogether I lost around 6LTC and 0.06BTC
Thanks.
sad to hear that