Quote from: amspir on March 08, 2015, 12:36:37 AM

I just lost over 2.5 bitcoins.

I used an Android wallet, which I do not want to name just yet, pending the developer's response to the situation.

With the wallet, I generated the new address 1Bn9ReEocMG1WEW1qYjuDrdFzEFFDCq43F then sent 2.57386667 btc from localbitcoins to that address, which is txid 47b689d108a33c05405332169d3a0eb96ded33ce711fcd498ead1ba5e2b72328. This is the only transaction that I initiated with this address.

Later, when planning to move the money to paper wallets, I discovered that this address had previous activity on it, and that most of the money was swept from that address after my transaction confirmed. There are several transactions afterwards which sweep the remaining money out of that address.

I suspect either that this problem is due to a collision from a poor PNR, or it was a malware attack.

Anyone with insight on tracing btc transactions want to comment?

where did u get the wallet from ? if downloaded from unreliable source, it could have been infected, and also the more probable version is that your android device
was previously backdoored from some game/app etc.
whatever you do, it wont bring you your bitcoins back, but you should explore your phone , or give it to someone who might shed some light so that something like this doesnt happen again.

The only thing that intrigues me here is this : u generated new address and it previously had activity on it, before its creation ?
that shouldnt be possible if theres not something wrong with app.

cheers