Topic: [SERIOUS PROBLEM!] I recieve bitcoins, it is automatically sent somewhere else (Read 27671 times)

That's a really good question.  I wish I would have thought to ask it. 

12 seconds between received and sent makes me suspect the private key for that address was imported at a mtgox account and now it automatically sweeps funds on arrival.
OP, do you have a mtgox account and imported the private key there by any chance?

1. Blockchain.info
2. No
3. No
4. Yes, but trusted from my friends
5. No

I do have the Private Key.

That is impossible, you do not get a private key.

First thing that came to mind.

https://blockchain.info/api/api_receive


Did someone create a forwarding address and you're using that address as your main wallet?

First thing that came to mind.

https://blockchain.info/api/api_receive


Did someone create a forwarding address and you're using that address as your main wallet?

Have you logged into your blockchain wallet from any computer other than yours?

Generating Receiving Addresses API call to generate a new bitcoin address ready to receive payments.

This method creates a unique address which should be presented to the customer and will forward all payments to your own receiving address. Each time a payment is forwarded the callback URL will be called.

The minimum supported transaction size is 0.001 BTC. Forwarding transactions will include a fee paid by blockchain.info.

https://blockchain.info/api/receive?method=create&address=$receiving_address&shared=$shared&callback=$callback_url

$receiving_address Your Receiving Bitcoin Address (Where you would like the payment to be sent)
$shared Boolean value (true, false) indicating whether this payment should be sent through a shared wallet.
$callback_url The callback URL to be notified when a payment is received. Remember to URL Encode the callback url when calling the create method.

A few things have me curious:

• What wallet are you using? (MultiBit, Electrum, Bitcoin-Qt, etc.)
• Have you ever imported any private keys into your wallet from anywhere? (Vanity address, paper wallet, Cascius coin, received key from someone, etc)
• Have you ever imported any private keys into any service anywhere? (MtGox key import, etc)
• Have you run any software on your computer acquired via filesharing?
• Do you store a backup of your wallet anywhere on the internet?(Google Drive, Drop Box, etc)

I don't think there is a key logger on my PC, nor Trojan/virus.

I use Bitdefender Windows 8 Security (same as Internet Security). Pretty much safe, it is.

key logger?

Can just someone tell me how the hacker checks for incoming transaction and sends it as soon as it gets 1 confirmation??

Also, its happening only on some addresses in the wallet.

Have a look at this address, it has only 2 transactions. One in and one out.

https://blockchain.info/address/15gbn4qwsHURFUwczsssdMj5u5sfaL4kVv

Stunna sent me 0.05 BTC to this address (which was my previous donation address) and then I saw this happen. The time between received and sent is just 12 seconds!! No more than 1 confirmation happened at that time!

https://bitcointalksearch.org/topic/m.2207807

What is happening? Please tell me!

It can not be moved with only 1 confirmation. Either the transaction was invalid, and from an orphaned block, due to it being fake... and returned back to the sender, or deleted if a double-spend... or you are not seeing that it actually had 6 actual confirms.

I can hack a block and it would show in your wallet... for at-least one-confirm... but as soon as the system sees it is fake, it removes it. Thus, it never made it past 6 confirms.

Where is this money coming from? The money you are seeing entering your wallet? If you are placing it there, then you should be worried. If this is from some automated payment system, you need to contact them to let them know the payments are not going through.

How does anyone see when you have money in there... simple... they just look at the block-info that you see. It is on everyones computer, and on that site, for the world to see.

Again... BTC can NOT be withdrawn by ANYONE if it was not validated (6+ confirms), unless a whole branch of fake transactions occurred on a block that was recently thrown-out, due to being invalid. (Thus, it was never your BTC to begin with. Thus, not a loss.)

If this was payment for something, you should wait for over 30 confirms... (120 to be realistic), before "accepting it as valid". People use double-spends and hacked blocks to fool automated systems. Those transactions do not survive 120+ confirms, unless a 51% attack is successful. No-one has 51% of the mining market.