Bitcoin Forum

Can someone help me figure out how this happened?

I purchased 8 bitcoins today and had them sent to my bitcoin-qt wallet, I got an email saying they have been sent so open it up and see they have arrived but are unconfirmed, so I come back an hour or so later to find that they have already been sent from my address to another address that I do not own (afaik, unless I am missing something here) and my balance is now at 0 bitcoins.

How the hell does this happen? I expect there is no way to recover those coins now? It's at 3/6 confirmations now for this new address... Am I screwed? I'm pretty careful about downloading anything that could be malware or clicking links etc so I have no idea how this happened? Is there anything I can do now?

If you are screwed or not nobody can say.
I would say you have malware on your computer, if it really happened as you described.

TX ID's, do you have them? You can double click the transactions on Bitcoin-qt and it will show you the details, including the TX ID

Dam what OS are you running? Vista?

run malwarebytes, what does it say?

I would advise Hitman Pro http://www.surfright.nl/en

If this is true, someone should report this to moderators and warn other people

if you really didn't send those 8 bitcoins your self, there is nothing else to say - your money is lost

might be false positives,.......  if someone downloaded them from 2 + mirrors and compared exe's, and they are different, then mabye 1 is virus

not that this helps you, but for the future , I would never run any of this stuff on a computer that has my wallet. I bought a 2nd pc to mine on, and run these things.... the wallet stays on my 'safe' computer

Man, that sucks... :(
Also be aware that if someone managed to get ahold of your wallet in the past (!) or got ahold of an old backup of your wallet, he/she will also be able to access your funds added to existing addresses after that point in time. This is often overlooked. So there doesn't even need to be malware on your PC right now, instead it could already have happend weeks or months ago, depending on your wallet's age.

Yes, all Bitcoin mining softwares are detected by AV's. At least they warn you about it. It's expected.

Is that wallet a new one, created by Bitcoin-qt? Have you ever added private keys to it, private keys that you took from someplace and forgot to label them as such and now you used that address to get those coins?


What can the moderators do? As for warning other people, well, you have this thread. But I'm not quite sure what you want to warn them about. He received Bitcoins at one address and they were sent out of that address 1 hour later or so, maybe when the other person who owns the same address private key noticed he had 8 BTC more than supposed.

check transactions...
https://blockchain.info/sl/address/1KusYRu9VZg9Eu7xKhsPdqcatp335GGqDd
whois,...

i think there is a nother thread here with thefts.... you could post on it to let ppl know

People here have to realize that the vulnerability is not the bitcoin network in itself, but rather the habits of the guy who owned the wallet he send bitcoins to. The only error here was human error.

I'm sorry for your loss, by the way.

thanks why I think, ironically, bitcoin will take off when there are 'bitcoin banks' that insure your coins

 :o :o :o NEVER EVER STORE YOUR COIN WALLET ON THE SAME MACHINE YOU MINE ON!  :o :o :o

False positive my ass!  ;)

To go forward what about a biometric lock... fingerprint scanners are getting really cheap, and or a credit card reader modded to use bit coins....

Just my .02

George

Just get a big usb memory stick and boot linux (ubuntu etc.) from it, use it only for accessing your bitcoin wallet, throw it in a fire proof safe when you're done.

Those transactions happened like this:

Received Time    2013-04-15 07:31:48
Included In Blocks    231434 (2013-04-15 07:36:05 +4 minutes)

Received Time    2013-04-15 08:38:02
Included In Blocks    231447 (2013-04-15 09:32:20 +54 minutes)

The coins were sent 13 blocks later or about 2 hours (or according to the time only 1 hour later.)

Does your bitcoin-qt have a password?

Lesson of the day. For new coins, use brand new addresses from brand new wallets. Either discard old ones, or consolidate all of them into an old-wallet.dat file just for checking purposes (if someone sends you coins to those old addresses.)

You can use pywallet to merge wallets, I think, and you should have no problem with wallets that are 10,000 keys big. But you wouldn't want to use that for your personal money. You'd just want to check those once a month maybe. Or less often.

call CSI

 ???

or it will force people to realize just how important securing their computers is.

it is extremely important to secure everything and know what your doing.

the thieves make it easier to lose your coins every day. two clicks in the wrong place on your browser and your wallet is gone.

how do you get a wallet thats offline if that possiable im not to computer smart btw

Bitcoins are gone bruh

I think that the most reliable bank is yourself, if you are educated and careful.

I think that you (DavidAU) are confused about something.

Take a look at all the transactions at that address. Every time bitcoins are sent to it, they are soon sent somewhere else. Why is that? How is the 8 BTC transaction any different from any of the others?

I don't know why the bitcoins were transferred, but it looks like it is completely normal. Perhaps you are confused about the address? Are you sure you own it? Maybe this is an exchange's address and the coins are getting sweeped into another address.

Also, does your wallet say that the 8 bitcoins are gone? The fact that they are no longer at that address doesn't mean they are gone. Do you understand the relationship between addresses and wallets, and how "change" is handled?