They have stolen bitcoins from my official Bitcoin wallet

[RodeoX]

I think it was this in the first message:

https://blockchain.info/address/15ESHhWuNfqMEQPXWexGb9kK1J53brWksL

Oh thanks, I see it now. Not that knowing the this is going to be enough.

[1715493543]

1715493543

[1715493543]

1715493543

[cr1776]

I think it was this in the first message:

https://blockchain.info/address/15ESHhWuNfqMEQPXWexGb9kK1J53brWksL

Oh thanks, I see it now. Not that knowing the this is going to be enough.

Agreed.  Somehow, someone got the private keys and took control of them.  Hard to get them back.

[Hannu]

I think it was this in the first message:

https://blockchain.info/address/15ESHhWuNfqMEQPXWexGb9kK1J53brWksL

Oh thanks, I see it now. Not that knowing the this is going to be enough.

Oh no, that is lot of money RUR/USD. Ruble even more value then Dollars 

[rebuilder]

I had the 1st wallet. Then when the sum of bitcoins was pretty big I've made the new one (about 3 years ago). I've transfered the bitcoins to the new wallet 1 time and keep them there. For the new bitcoins I've used the new wallet.

Just to be clear:

The new wallet is the one that has this address in it:
https://blockchain.info/address/15ESHhWuNfqMEQPXWexGb9kK1J53brWksL
correct?

And you created this wallet 3 years ago. You did not transfer anything to this new wallet until November 4th, 2014. Correct?

If that's the case, it seems your keys have been compromised some time over the last 3 years, and the thief likely just waited for something to be transferred to an address controlled by those keys. This would, to me, suggest an automated system to check a number of compromised keys for new BTC, which in turn would suggest a relatively widespread virus of some sort being how your keys got stolen.

[ed_war_d]

I had the 1st wallet. Then when the sum of bitcoins was pretty big I've made the new one (about 3 years ago). I've transfered the bitcoins to the new wallet 1 time and keep them there. For the new bitcoins I've used the new wallet.

Just to be clear:

The new wallet is the one that has this address in it:
https://blockchain.info/address/15ESHhWuNfqMEQPXWexGb9kK1J53brWksL
correct?

And you created this wallet 3 years ago. You did not transfer anything to this new wallet until November 4th, 2014. Correct?

If that's the case, it seems your keys have been compromised some time over the last 3 years, and the thief likely just waited for something to be transferred to an address controlled by those keys. This would, to me, suggest an automated system to check a number of compromised keys for new BTC, which in turn would suggest a relatively widespread virus of some sort being how your keys got stolen.

In this case nobody can be sure his bitcoins are safe.
Cool wallet on the paper is a good thing, but...
You make new wallet and write it on paper and put 1 btc into. After 1 year you will need put another 1 btc there, but you will not shure has your wallet the 1st 1 btc or not for some reason.
You'll need to synchronize core to be sure the your wallet has the 1st 1 btc.
If you are not sure it is a not very good idea to put your other 1 btc

[rebuilder]

In this case nobody can be sure his bitcoins are safe.
Cool wallet on the paper is a good thing, but...
You make new wallet and write it on paper and put 1 btc into. After 1 year you will need put another 1 btc there, but you will not shure has your wallet the 1st 1 btc or not for some reason.
You'll need to synchronize core to be sure the your wallet has the 1st 1 btc.
If you are not sure it is a not very good idea to put your other 1 btc

It's a good practice to note down the address (Not the private key!) your long-term storage coins are held at. That way, you can check the BTC is still there on blockchain.info or any other block explorer site with no risk of compromising your private keys.

The real issue is making sure your private keys stay safe in the first place. For sums like you unfortunately lost, you need to be quite careful. Using a freshly created linux USB to create your wallet, and generating the keys offline, writing them on paper and then wiping the USB boot disk should be a pretty good solution. If you want to run a Bitcoin client and intend to ever send BTC to a wallet on that client, you should have a computer completely set aside for that purpose, in a safe space. Do not run a bitcoin client on your day-to-day computer. I wouldn't trust anything other than a fresh install of an OS to run a client on. Preferably a fresh computer as well, if you're feeling paranoid enough about rootkits etc.

Sorry for your loss. I wish we could help, but it's probably all gone now. If you still have BTC elsewhere, make sure to secure them very well.

[btcxyzzz]

I installed Windows 10 in October.

God fined you for using that crap.

[Was]

Microsoft stole them

[BitcoinNewsMagazine]

The only secure way to use Bitcoin Core is with Armory in cold storage mode. Needs two computers though. If your private keys are not permanently offline you are ripe to be a victim of malware sooner or later. Get a Ledger hardware wallet for $20.

[ranochigo]

In this case nobody can be sure his bitcoins are safe.
Cool wallet on the paper is a good thing, but...
You make new wallet and write it on paper and put 1 btc into. After 1 year you will need put another 1 btc there, but you will not shure has your wallet the 1st 1 btc or not for some reason.
You'll need to synchronize core to be sure the your wallet has the 1st 1 btc.
If you are not sure it is a not very good idea to put your other 1 btc

The best way is to ensure that it is safe is probably to generate it offline and make multiple copies of it. When you spend it, send the change to another newly generated address from the offline computer.

You don't need to use Bitcoin Core to make a cold wallet. Electrum with a raspberry pi would be sufficient. Put the transaction info into the USB drive, go to your offline raspberry pi to sign it and broadcast it on your online computer. All activities on your Bitcoin address can be tracked easily using a block explorer. All the activities are recorded there and it is easy to check the balance with only your address.