Computer ransomware made 99 countries recruit who did it?
(Security personnel display computer ransomware virus named WannaCry)
According to the BBC News, according to the BBC, a piece of software that is considered to be developed by the US National Security Agency was used by lawbreakers to carry out large-scale cyber attacks.
The virus locked thousands of computers worldwide and extorted $300 worth of bitcoins to unlock.
These tools are allegedly from the hands of the US National Security Agency. In April this year, a hacker group named "Shadow Broker" stole these tools and published them online. Although Microsoft updated the vulnerabilities used by hacking software in March, it is clear that there are still many computers in the world that cannot be updated in time.
How large is the scale of the attack?
The scale of the attack involves 99 countries and regions around the world. The United Kingdom, the United States, China, Russia, Spain, Italy and Taiwan all have reports of infection.
Network security company Avast claims to have detected 75,000 WannaCry hijackers worldwide. The large scale has shocked the Avast software researcher Jakub Kroustek.
Many researchers claim that sudden outbreaks of attack may be related to each other, but they are not considered organized attacks against specific targets.
Which organizations are affected?
The National Health Service (NHS) in the UK has been extorted. NHS employees showed screenshots of the attacked computer. Hospital operations and doctors' surgery cannot be performed normally. An NHS worker told the BBC that the consequences of the hospital's outage would be patient suffering and death.
There are reports that Russia has been subjected to more attacks than any other country. The Russian Interior Ministry said that it has learned that the blackmail virus has ravaged domestic computers and that the country’s anti-virus software is operating to destroy the virus, emphasizing that less than 1% of computers are affected.
Many German and Italian netizens posted images of computer attacks on Twitter. Pictures showed that a train ticket ticket machine was also attacked.
Spanish telecommunications giant Telefonica, power company Iberdrola and natural gas company Gas Natural have all been attacked. Reported that these companies informed employees to turn off their computers.
Portugal Telecom, FedEx FedEx, and Russia’s second-largest telecom operator Megafon are also among the attacks.
Behind the scenes?
Some experts claim that the attack may exploit a vulnerability called "EternalBlue." NSA has been using this loophole for spying before, and later "shadow broker" hackers have stolen NSA files. Hackers tried to auction thefts on the Internet. After the unsuccessful auction, these tools were made public and released on April 8. File encryption password.
Hackers claimed that the publication of the NSA's crime tool was to express their protest against President Trump.
At the time, some network experts stated that some malware was still available, but some were invalid. Microsoft released patches as early as March, but many computers did not install updates in a timely manner.
Microsoft on Friday said its engineers have stepped up monitoring and defense of the WannaCry virus and provided assistance to affected customers.
How does malware work?
Some security personnel point out that the infection appears to be done by worms that spread between computers. Unlike many other malicious programs, this program itself has the ability to move autonomously within the network. Ordinary malware relies on human operations to spread, such as the code disguised in the attachment to defraud the user for electric shock. In contrast, once a computer in an organization is infected by WannaCry, it will silently continue to infect other vulnerable computers in the organization. This also explains why WannaCry infections occur in large-scale organizations. (Sun Wenwen)
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