Same here today I swept the private key of an address with 0.005 btc(i ve sent that amount before) As soon as the transaction occured the btc automatically transferred to another address that i dont recognize Electrum wallet was downloaded from https://electrum.org/#download

1LKrhFV52VMA9KKMv6pwM5k2Gp1PFnj6MA was the address that i swept the 0,005 btc