Bitcoin of northeast finance
By the end of July 2020, bitcoin is now 98 yuan
the bitcoin address and private key appear in pairs, and their relationship is just like the bank card number and password. A bitcoin address is like a bank card number, which records how much bitcoin you have on it. You can generate bitcoin address at will to store bitcoin. When each bitcoin address is generated, a corresponding private key of the address will be generated
extended materials:
whenever bitcoin comes into the view of mainstream media, mainstream media always ask some mainstream economists to analyze bitcoin. Earlier, these analyses always focused on whether bitcoin was a scam. Now the analysis is always focused on whether bitcoin can become the mainstream currency in the future. The focus of the debate is often on the deflationary nature of bitcoin
many bitcoin players are attracted by the fact that bitcoin can not be issued at will. The attitude of bitcoin players is quite the opposite, and the attitude of economists is polarized compared with the fixed amount of 21 million bitcoin
it is reported that the virus can spread rapidly in the local area network by taking advantage of the vulnerability of port 445 of windows system, but large local area networks such as schools have not done similar prevention, so it has become the target of attack
the success probability of brute force cracking is 0
a person in bitcoin instry said that bitcoin blackmail virus had existed as early as 2014. This time, the technology used by hackers is more high-end than last time, and the scope of influence is wider, but the identity of hackers is still unclear
moreover, the "variability" of this virus lies in the addition of automatic transmission for windows 445 port. As long as the windows system machine fails to upgrade the latest patch, making port 445 open, the virus can invade the machine
the virus requires the intruder to pay $300 worth of bitcoin ransom within six hours, and then the ransom will rise every other time
some netizens pointed out that it is difficult to crack the virus by violence. If bitcoin blackmail virus wants to crack by violence, the possibility is infinitely small, and it is impossible to complete it by virtue of personal ability
port 445 enables users to easily access all kinds of shared folders or shared printers in the LAN
port 445 gives an opportunity for malicious attackers. The normal home network has been limited by the operators to 445 port access, but the school and other large LAN did not do similar prevention, so it became the target of attack
in this virus attack, most of the domestic students who are affected are in Colleges and universities, and the seniors who are about to graate are affected, and the documents related to the design papers are locked. Many universities, including Shandong University, Nanchang University, Guangxi Normal University and Northeast University of Finance and economics, have issued emergency notices to remind teachers and students to take precautions
this virus is more accurately an encryption method. The virus will encrypt all the key files in the computer and make people pay for the unlock password, but whether the hacker will keep his promise and provide the unlock password is his problem
bitcoin blackmail virus has appeared many times
one of the characteristics of this type of virus is to ask the victim to pay bitcoin as ransom. According to many people in the instry, bitcoin is usually used as a tool for cross-border payment and remittance because of its global characteristics. In addition, as a kind of network encryption virtual currency, bitcoin has the characteristics of decentralization and anonymity. The flow of funds is not easy to track, so it is convenient for hackers to make use of its collection and payment, and it is more convenient for them to hide their identities
"if you transfer money to a hacker, you essentially give him a small string of encrypted codes that can be quickly transmitted on the Internet and stored in an electronic wallet." Some people in the instry told reporters that the anonymity of bitcoin is often the reason why computer fans, financial speculators and even drug dealers are fascinated by it
according to the current attacked computers, hackers ask for a ransom of $300 (about RMB 2069.16) worth of bitcoin for each computer
but the area of this virus infection is very large. If everyone pays the ransom, will malicious attackers be able to unlock it in time? Because it is not clear whether the virus will be unlocked manually or online. If it is handled manually, it is likely that it will be too late to handle. However, online processing is fully automatic. After bitcoin has paid, it will automatically collect money and then issue the unlock code
therefore, it is not recommended that the victim pay a ransom to the hacker, because even if you pay, the hacker may not know which computer you have
it is worth mentioning that the outbreak of bitcoin blackmail virus has pushed bitcoin to the top of the wave again. "Bitcoin virus" has become a hot search keyword, and many bitcoin insiders have expressed their concerns about bitcoin's "stigmatization"“ Good tools should not be blamed because they are used by bad people. " A person in the bitcoin instry said, "bitcoin is bitcoin, virus is virus, injustice has a head, debt has owner, so it is unnecessary to have hostility to bitcoin."
now, the most important thing is that the victims should install the patch released by Microsoft as soon as possible to prevent unfamiliar e-mail, and important files should be backed up to the cloud platform and local offline hard disk
wannacry blackmail virus prevention method:
1. Install the latest security patch for the computer. Microsoft has released patch ms17-010 to fix the system vulnerability of "eternal blue" attack. Please install this security patch as soon as possible; For Windows XP, 2003 and other machines that Microsoft no longer provides security updates, we can use 360 "NSA Arsenal immunity tool" to detect whether there are vulnerabilities in the system, and close the ports affected by the vulnerabilities, so as to avoid being infringed by blackmail software and other viruses
2. Close ports 445, 135, 137, 138 and 139, and close network sharing
3. Strengthen the awareness of network security: don't click the unknown link, don't download the unknown file, don't open the unknown email...
4. Back up the important files in your computer to the mobile hard disk and U disk as soon as possible (regularly in the future), and save the disk offline after the backup
5. It is recommended that users who are still using Windows XP and windows 2003 should upgrade to Windows 7 / windows 10 or windows 2008 / 2012 / 2016 as soon as possible.
the general process is to use the computer's CPU and / or image processor to calculate bitcoin information
for Internet cafes and users, it will greatly rece computer resources:
program operation is very slow
crash
blue screen
and so on
In the evening of May 12, the wanna cry worm virus broke out in more than 74 countries around the world. At least 45000 machines have been infected. The network system of some colleges and universities in China has become a disaster area, and the network payment system of PetroChina gas station has also been affected
it is reported that the virus can spread rapidly in the local area network by taking advantage of the vulnerability of port 445 of windows system, but large local area networks such as schools have not done similar prevention, so it has become the target of attack
{rrrrrrr}
therefore, it is not recommended that the victim pay ransom to the hacker, because even if you pay, the hacker may not know which computer you have
it is worth mentioning that the outbreak of bitcoin blackmail virus has pushed bitcoin to the top of the wave again. "Bitcoin virus" has become a hot search keyword, and many bitcoin insiders have expressed their concerns about bitcoin's "stigmatization"“ Good tools should not be blamed because they are used by bad people. " A person in the bitcoin instry said, "bitcoin is bitcoin, virus is virus, injustice has a head, debt has owner, so it is unnecessary to have hostility to bitcoin."
now, the most important thing is that victims should install the patch released by Microsoft as soon as possible to prevent strange mail, and important files should be backed up to the cloud platform and local offline hard disk
computers in many colleges and universities were attacked by the Internet
Xiao, a student of City College of Zhejiang University, told Beiqing Daily yesterday that in the same dormitory building with her, many students' computers were attacked, "now many students dare not turn on their computers for fear of being hacked."
a student of Guilin University of Technology said that at present, more than 100 computers in his school have been attacked by the blackmail virus "bitcoin virus". Most of the attacked computers are users of the campus network. "Now they dare not connect to the campus network for fear of being attacked.". A student of Guangxi Normal University said that on the evening of the 12th, while he was revising his paper, his computer was suddenly infected by the bitcoin virus, which affected the operation of the computer and encrypted the files. The student told the Beijing Youth Daily that after the computer was attacked, a red and white dialog box will appear, which will tell you what happened, how to recover and how to pay
since the evening of the 12th, Shandong University, Nanchang University, Guangxi Normal University, Northeast University of Finance and economics, East China Jiaotong University, Civil Aviation University of China and other universities have issued relevant prevention notices on the invasion of the blackmail virus "bitcoin virus" into the campus network.
so there's no way
hope to adopt~
since the evening of May 12, teachers and students in many colleges and universities in China have found that the files and programs in their computers can't be opened one after another. Instead, a dialog box pops up asking for ransom such as bitcoin before they can recover< At present, more than a dozen universities, including Shandong University, Nanchang University, Guangxi Normal University, Northeast University of Finance and economics and Zhongshan College of University of Electronic Science and technology, have issued notices of virus attacks to remind teachers and students to take precautions
some colleges and universities have informed that recently, many colleges and universities in China have been infected with onion blackmail software, and disk files will be encrypted to. Onion suffix by virus. Only by paying a high ransom can the files be decrypted and recovered, causing serious losses to learning materials and personal data. According to the network security agency, this is a virus attack launched by lawless elements using the "eternal blue" leaked from NSA hacker's weapon library.
A few days ago, computer systems in nearly 100 countries and regions around the world were attacked by a virus called wannacry. The attackers were asked to pay bitcoin to unlock. It is reported that more than 57000 cases of infection have been observed in 99 countries
< P > close the external network access rights of port 445 (other associated ports such as
135, 137, 139) and close unnecessary service ports mentioned above on the server
strengthen the internal network area access audit of port 445 (other associated ports such as
135, 137, 139) to discover unauthorized behavior or potential attack behavior in time
since Microsoft has stopped updating some operating systems, it is recommended to check windows
XP and Windows Server 2003 hosts (ms17-010 update is no longer supported) and use an alternative operating system; Do a good job of information system business and personal data backup