A few days ago, my friend has lost 1.23BTC and 325LTC. after several days of investigation, we have found some important thing, and decide to publich our result.
My friend has an infinitecoin wallet at the same computer. When he found the thief has stolen BTC and LTC, then he quickly transfer infinitecoin to another wallet, but the transaction is unconfirmed. and a few days later, coins go back. and even more, he found he receive more infinitecoins (but don't happy, hacker can send coins to you, he should take back again). actually, today, 13, Aug, 2014, hacker stole all of infinitecoins.
When we reinstall the OS again, and only run infinitecoin wallet, we can detect virus warning by tool. So, it's clear that the infinitecoin wallet is malware, but my friend download from infinitecoin official website
http://www.infinitecoin.com/ifc-wallet-download.
the result is: thief is in the infinitecoin team. He/they have control inifitecoin, they can launch 51% attacking. they can unconfirm any inifitecoin transaction, they can transfer your inifitecoin to any wallet address.
the infinitecoin wallet has become the thief tool to steal password and BTC and LTC, and they even send some IFC to you to prevent you from removing the software.
Though I have recomended the IFC, but now, it's dead. thief has gone into its team.
I hope other expert can seize the thief from infinte team, the hacker is thief, thief is very cheap.
from:https://bitcointalk.org/index.php?topic=737420.msg8332327#msg8332327