unauthorized transaction

[doz4]

i am using bitcoin core wallet and i used it for a while without problem but now i see a Transactions which is i do not do it!
-0.011894 is my other address from blockhain but then on 13 april all my balance sent to this
adress 14ntb85ZRyuQLMvNikKf9FccjwRih2rfi2
and i don't do this transaction how that can possible

transaction:https://blockchain.info/tx/5f24d037ccf65b9299f0f71a0f83d6ab900ecc4e78945e8d1633ff2664785986
my address=1DMLBZE9GY48Qxm6ipS7r6crSRnkwg3Pp1

i just want to know how that can possible i am sure no one access to my pc also i remember 13 april and my laptop never touched by someone else especially for 13 april
and also it wasn't synchronized for a while and in last 2-3 day i synchronized it and see that transaction

https://i.imgur.com/PkR50yS.png

[Alaki]

Basically, your wallet's hacked. Someone gained access to your private key & they did spend all of the btcs in it. The same case did happen with meh a few days ago. However, the best thing that you can do is to format your computer & start with a new wallet (like meh) & you'll be fine. Simple as that. Take that as a lesson & next time dont download random things over the net.

[merelcoin]

Basically, your wallet's hacked. Someone gained access to your private key & they did spend all of the btcs in it. The same case did happen with meh a few days ago. However, the best thing that you can do is to format your computer & start with a new wallet (like meh) & you'll be fine. Simple as that. Take that as a lesson & next time dont download random things over the net.

Just to add to this answer: most likely, you are 100% correct, altough it's usually done by a keylogger, or remote controll software that has infected your pc... not by really hacking the wallet. Just to be clear: if you used a password to protect your wallet.dat and your pc is clean, chances of a wallet getting hacked are very, very slim.

A couple lessons:
- always use a virusscanner, malware scanner and a firewall
- password protect your wallet.dat
- if possible, use a hardware wallet or paper wallet

[doz4]

Basically, your wallet's hacked. Someone gained access to your private key & they did spend all of the btcs in it. The same case did happen with meh a few days ago. However, the best thing that you can do is to format your computer & start with a new wallet (like meh) & you'll be fine. Simple as that. Take that as a lesson & next time dont download random things over the net.

Just to add to this answer: most likely, you are 100% correct, altough it's usually done by a keylogger, or remote controll software that has infected your pc... not by really hacking the wallet. Just to be clear: if you used a password to protect your wallet.dat and your pc is clean, chances of a wallet getting hacked are very, very slim.

A couple lessons:
- always use a virusscanner, malware scanner and a firewall
- password protect your wallet.dat
- if possible, use a hardware wallet or paper wallet

Basically, your wallet's hacked. Someone gained access to your private key & they did spend all of the btcs in it. The same case did happen with meh a few days ago. However, the best thing that you can do is to format your computer & start with a new wallet (like meh) & you'll be fine. Simple as that. Take that as a lesson & next time dont download random things over the net.

yes i didn't use any password i didn't know about this feature i wil do a clean or a format
i see i saved my dat file to a local folder looks like someone access this file and while it isn't password protected

[merelcoin]

Basically, your wallet's hacked. Someone gained access to your private key & they did spend all of the btcs in it. The same case did happen with meh a few days ago. However, the best thing that you can do is to format your computer & start with a new wallet (like meh) & you'll be fine. Simple as that. Take that as a lesson & next time dont download random things over the net.

Just to add to this answer: most likely, you are 100% correct, altough it's usually done by a keylogger, or remote controll software that has infected your pc... not by really hacking the wallet. Just to be clear: if you used a password to protect your wallet.dat and your pc is clean, chances of a wallet getting hacked are very, very slim.

A couple lessons:
- always use a virusscanner, malware scanner and a firewall
- password protect your wallet.dat
- if possible, use a hardware wallet or paper wallet

Basically, your wallet's hacked. Someone gained access to your private key & they did spend all of the btcs in it. The same case did happen with meh a few days ago. However, the best thing that you can do is to format your computer & start with a new wallet (like meh) & you'll be fine. Simple as that. Take that as a lesson & next time dont download random things over the net.

yes i didn't use any password i didn't know about this feature i wil do a clean or a format
i see i saved my dat file to a local folder looks like someone access this file and while it isn't password protected

That can indeed be the problem... If somebody manages to download your wallet.dat and you didn't use a (strong) password, the attacker could have transferred all your coins to his own wallet.

You made two mistakes in your setup: you allowed somebody to have access to your wallet.dat, either by saving it in a "wrong" place, or by letting your computer getting infected. A second mistake was not to password protect your wallet.

Luckily for you, the damage wasn't that big, you should learn from your mistakes, and make sure you never lose a coin again

[Monnt]

Luckily you didn't lose much.  Maybe $5.

Nowadays, with the popularity of bitcoin going up, it will also lead to a higher amount of hackers on the prawl. Pretty much everyone with more than 0.1 BTC should have a hardware wallet. Just get a Ledger wallet for God's sake. It's 15 bucks.

[doz4]

Basically, your wallet's hacked. Someone gained access to your private key & they did spend all of the btcs in it. The same case did happen with meh a few days ago. However, the best thing that you can do is to format your computer & start with a new wallet (like meh) & you'll be fine. Simple as that. Take that as a lesson & next time dont download random things over the net.

Just to add to this answer: most likely, you are 100% correct, altough it's usually done by a keylogger, or remote controll software that has infected your pc... not by really hacking the wallet. Just to be clear: if you used a password to protect your wallet.dat and your pc is clean, chances of a wallet getting hacked are very, very slim.

A couple lessons:
- always use a virusscanner, malware scanner and a firewall
- password protect your wallet.dat
- if possible, use a hardware wallet or paper wallet

Basically, your wallet's hacked. Someone gained access to your private key & they did spend all of the btcs in it. The same case did happen with meh a few days ago. However, the best thing that you can do is to format your computer & start with a new wallet (like meh) & you'll be fine. Simple as that. Take that as a lesson & next time dont download random things over the net.

yes i didn't use any password i didn't know about this feature i wil do a clean or a format
i see i saved my dat file to a local folder looks like someone access this file and while it isn't password protected

That can indeed be the problem... If somebody manages to download your wallet.dat and you didn't use a (strong) password, the attacker could have transferred all your coins to his own wallet.

You made two mistakes in your setup: you allowed somebody to have access to your wallet.dat, either by saving it in a "wrong" place, or by letting your computer getting infected. A second mistake was not to password protect your wallet.

Luckily for you, the damage wasn't that big, you should learn from your mistakes, and make sure you never lose a coin again

i learned a lot from this but 100$ is big enough for me

Luckily you didn't lose much.  Maybe $5.

Nowadays, with the popularity of bitcoin going up, it will also lead to a higher amount of hackers on the prawl. Pretty much everyone with more than 0.1 BTC should have a hardware wallet. Just get a Ledger wallet for God's sake. It's 15 bucks.

i think you misunderstand that $5 is a normal one i did it but after it have 100$ transaction which is unauthorized  and 100$ is big enought for me like 1 month home rent price in my current home

[Amadues]

Luckily you didn't lose much.  Maybe $5.

Nowadays, with the popularity of bitcoin going up, it will also lead to a higher amount of hackers on the prawl. Pretty much everyone with more than 0.1 BTC should have a hardware wallet. Just get a Ledger wallet for God's sake. It's 15 bucks.

there are a lot of safe system and not only an hardware wallet...
you can create an off line address (and priv  key) where you send your btc to save.
you can use electrum (and remember only the word that you need)
you can use some 2FA that need your control...
and so on

[Kprawn]

Hey, $100 or $5 is still a lot for someone living in a third world country and having a hard time surviving. {Not saying you are from a third world country, just making an example} The thing is, these

people do not care who they are stealing from... for them it is just an opportunity to get money. Until we find better ways to help people to protect their money, we are no better than any other system.

The weak points in the security of Bitcoin is still the human behind the keyboard.... We need to eliminate those weak points and reduce the third part services that can be hacked. Put more hardware

wallets into people's hands and make them cheaper... they are less likely to fail. 

[wuvdoll]

Luckily you didn't lose much.  Maybe $5.

Nowadays, with the popularity of bitcoin going up, it will also lead to a higher amount of hackers on the prawl. Pretty much everyone with more than 0.1 BTC should have a hardware wallet. Just get a Ledger wallet for God's sake. It's 15 bucks.

Lucky indeed. He only lost $5 for a valuable lesson. Hackers are relentless these days. I mean I know a few people (just know them by their alias) who hacks into pc's, although they don't do anything. They just enjoy accessing pc's.
At any rate, op should've probably learned his/her lesson by now.

[franky1]

although you done a screenshot of your desktop computers wallet history.. do you also have a blockchain.info wallet aswell.

it might be that the funds were just swept into a new "change address" stored in a blockchain.info wallet. (thus not showing on your desktop computer)

if you have never copied your private keys into an online wallet service from your computer, then it is worth checking your computer.

think about where the private key of 1DMLBZE9GY.... came from.. did you import the key from another service. or was it generated by your desktop bitcoin program.

if from a service (paperwallet/blockchain.info/brainwallet) then that may be the source of loss.. if generated from your desktop program and never exported the address out to an online service. then the source of the loss is most definitely on your computer

[MingLee]

Consider yourself very lucky that you lost only a few dollars, they could have stolen much more if they cared to.

The best thing you can do right now is send everything you can to a sanitized computer with a wallet, and hope nothing else gets taken in the meantime.

[doz4]

Consider yourself very lucky that you lost only a few dollars, they could have stolen much more if they cared to.

The best thing you can do right now is send everything you can to a sanitized computer with a wallet, and hope nothing else gets taken in the meantime.

a few? it is 100$ and not a few for me and nothing left in wallet all gone:(

although you done a screenshot of your desktop computers wallet history.. do you also have a blockchain.info wallet aswell.

it might be that the funds were just swept into a new "change address" stored in a blockchain.info wallet. (thus not showing on your desktop computer)

if you have never copied your private keys into an online wallet service from your computer, then it is worth checking your computer.

think about where the private key of 1DMLBZE9GY.... came from.. did you import the key from another service. or was it generated by your desktop bitcoin program.

if from a service (paperwallet/blockchain.info/brainwallet) then that may be the source of loss.. if generated from your desktop program and never exported the address out to an online service. then the source of the loss is most definitely on your computer

i checked my blockchain wallet but nothing here also i never export my private key just now made search and learned how to export i think my wallet.dat file which i copied to my D: drive was copied by someone somehow and then access my bitcoin
i just used bitcoin core to sing some messages for a-ads.com but i do this very long ago

Luckily you didn't lose much.  Maybe $5.

Nowadays, with the popularity of bitcoin going up, it will also lead to a higher amount of hackers on the prawl. Pretty much everyone with more than 0.1 BTC should have a hardware wallet. Just get a Ledger wallet for God's sake. It's 15 bucks.

Lucky indeed. He only lost $5 for a valuable lesson. Hackers are relentless these days. I mean I know a few people (just know them by their alias) who hacks into pc's, although they don't do anything. They just enjoy accessing pc's.
At any rate, op should've probably learned his/her lesson by now.

it isn't 5$ i learned now but also lose 100$ and thats too bad for me

[cjmoles]

That really sux....I don't care if it was one sat or one bitcoin, it sux to have your system compromised.  Just the hassle of having to trace the source and cleaning your system is bad.  It doesn't matter how much one has in their wallet....they should always make sure their system is secure so that they don't have to mess with having to fix their machine!