BTC intrusion

1. In June 2011, Symantec issued a warning that botnets are participating in bitcoin; mining & quot; In the middle. This can take up the computing power of the victim's computer, consume extra power, and cause the temperature of the host to rise. Later that month, ABC found an employee using the company's server to mine
some malware also make great use of the parallel computing power of graphics cards. In August 2011, botnet of bitcoin mining was discovered, and Mac OS X infected by Trojan horse was also discovered to mine bitcoin.
on June 19, 2011, security vulnerability of mt.gox (Magic: abbreviation of the gathering online exchange) bitcoin trading center caused the price of 1 bitcoin to drop to 1 cent (although other transactions were not affected). The reason is that a hacker stole the user's mtgox certificate from the computer infected with the Trojan horse, so he transferred bitcoin to his own account and sold it, resulting in a large number of "ask" requests at that price. A few minutes later, mtgox shut down and cancelled the abnormal transactions in the hacking incident, making the price of bitcoin rebound back to $15. In the end, the bitcoin exchange rate went back to what it was before the crash. Accounts equivalent to more than $8750000 were affected
in July 2011, the operator of bitomat, the world's third largest bitcoin trading center, announced the loss of access rights to the wallet.dat file that records 17000 bitcoins (about 220000 US dollars). At the same time, announced the decision to sell services to make up for the loss of users
in August 2011, mybitcoin, one of the processing centers of common bitcoin transactions, announced that it had been attacked by hackers and shut down. Involving 49% of customers' deposits, more than 78000 bitcoins (then equivalent to about $800000) are missing
in early August 2012, bitconica was sued in the San Francisco court for damages of about $460000. In 2012, bitconica was attacked twice by hackers, accused of ignoring the security of customers' funds and forging withdrawal applications
in late August 2012, bitcoin savings and trust was shut down by its owner, leaving about US $5.6 million in debt. At the same time, he was accused of operating the Ponzi scheme. In September 2012, the securities and Exchange Commission began to investigate the case
in September 2012, bitfloor trading center was also hacked, and 24000 bitcoins (about US $250000) were stolen. Bitfloor was suspended. Bitfloor resumed operations in the same month, and its founder said he had reported the theft to the FBI and that he was planning to compensate the victims, but the compensation schele was unclear
in June 2011, a hacker transferred 25000 bitcoins into his account, which is equivalent to 500000 US dollars. The whole transaction could not be traced. Although the owner of bitcoin announced the theft on the Internet, it was useless. The hacker became the first thief of bitcoin
in 2012, 46703 bitcoin worth US $228845 was stolen e to the disclosure of the super management password of the server of the website hosting provider linode. More than 43000 stolen bitcoins belong to bitcoinica, a bitcoin trading platform. Another 3094 bitcoins are owned by Marek palatinus, a Czech programmer. Gavin Andersen, the chief bitcoin programmer, also lost his five bitcoins.

2. Install a computer manager on your computer and then open the toolbox to find the blackmail virus immunity tool
with this tool, your computer won't have to worry about the virus problem

3. The purpose of mining is to package the transaction block. If the package is successful, you will open a new package and get a 25 bitcoin reward, as well as the handling charge for the future transactions added to the package. Then other miners will start to package the transaction generated by your new package until the next package comes out first. In the future, the mining capacity of bitcoin will be small or even zero. You still have transaction fees. The system will always need miners, and mining machines will still exist.

4. It depends on the unit or the indivial. There are about 20 or 30 units in the unit and about 10 units in the indivial family. Of course, there are also games to watch.

5.

As far as I know, there are probably two ways to obtain bitcoin. One is to use assets such as cash to trade with other bitcoin users. Generally speaking, the value of assets is determined according to the market value of bitcoin. However, the market value of bitcoin fluctuates a lot, and there may be hackers on the trading platform, so there may be some risks in this way

So if you want to get bitcoin by mining, you need a computer with high performance and a lot of manpower to maintain it. All in all, acquiring bitcoin is an investment and needs to be managed reasonably< br />

6. Yeah, I think it's better than fire coin. I've been using okex, and it's a great experience.

7. According to the analysis of 360 security center, the campus network blackmail virus was spread by the "eternal blue" hacker weapon leaked by NSA“ "Eternal blue" can remotely attack the 445 port (file sharing) of windows. If the system does not install the Microsoft patch in March this year, it does not need any user operation. As long as it turns on the Internet, "eternal blue" can execute any code in the computer and implant malicious programs such as blackmail virus.

8.

prevention:

at present, the main way of poisoning is through most of the attacks coming from phishing e-mail, or the website with malware visited by the victims

don't open the e-mail with unknown source, don't click the unsafe link, don't scan the QR code with unknown source, and don't give permission to the software with unknown source

Computer Xiao can pinch the Internet to avoid the limelight

{rrrrrrr}

treatment:

1. Firewall shielding port 445

2. System update with windows update

3. Turn off smbv1 service

3.1 is suitable for customers running Windows 8.1 or Windows Server 2012 R2 and later

for client operating system:

open control panel and click program, Then click turn windows features on or off

in the windows features window, clear the SMB 1.0/cifs file sharing support check box, and then click OK to close this window

restart the system

3.2 for server operating system:

open "server manager", click "management" menu, and then select "delete roles and functions"

in the features window, clear the SMB 1.0/cifs

file sharing support check box, and then click OK to close this window

restart the system

3.3 is suitable for running Windows 7, Windows Server 2008 R2, Windows Vista and Windows Server 2008. Modify the registry

registry path: HKEY_ LOCAL_ Machine system currentcontrolset services llanmanserver parameters

New Item: smb1, value 0 (DWORD)

restart the computer

1: open the blackmail software interface, Click. ( the hacker's bitcoin address)

2: paste it into btc.com (blockchain query)

3: find the transaction record of the hacker's collection address in the blockchain query, Then choose a txid (transaction hash value)

4: and paste the txid to the blackmail software interface button connect us.

5: after the hacker sees it, you can click check payment.

6: then click decrypt to decrypt the file

9. After investigation and confirmation by professional network security companies, gatecoin, a bitcoin platform, publicly declared that its system had been hacked and 15% of its digital asset deposits had been stolen

another platform closed down e to hacker intrusion. Is bitcoin still in spring< Bitcoin (BTC): originally proposed by Nakamoto, it belongs to a kind of digital currency. It is based on a specific algorithm and generated through a large number of calculations. Therefore, the issuance of bitcoin is not manipulated by any government, bank, organization or indivial. The total number of bitcoins is very limited. In the past four years, there were only less than 10.5 million, and in the future, the total number of bitcoins will always be limited to 21 million

Hot Wallet: it can be connected to the Internet, has strong circulation, can be used for daily consumption, and is vulnerable to hackers

cold Wallet: it won't connect to the Internet and has poor circulation, but it is not easy to be attacked by hackers

gatecain explained in an official article that the server intrusion occurred between May 9 and May 12. On the night of May 9, the service was interrupted e to the restart of a server. Associated with the time node, I strongly feel that the hacker intrusion event has an indispensable relationship with this service interruption

on the evening of May 13, gatecoin detected some suspicious transactions, so it immediately suspended the service for investigation to prevent more unauthorized access to Eth and BTC hot wallets<

loss

the hacking incident caused huge losses to gatecoin, with 185000 Ethernet coins and 250 bitcoins, with a total value of US $2 million, accounting for 15% of gatecoin's total digital assets

the security company investigated and found the hackers' Ethernet and bitcoin addresses, and gatecoin is raising funds to make up for the losses

Wright coin, Ruitai coin, doggy coin, Ethereum, bitstock and other digital currencies are also excellent.

10. Today, the wannacry blackmail virus has infected 300000 computers in 150 countries and regions around the world, causing hospitals, schools and enterprises to lock up their equipment and data and extort ransom for decryption. By quietly infecting the computer network and using the server information blocking problem in the outdated windows system computer, this virus can spread rapidly.