YCLOAK

This weekend’s global online extortion attack reinforces the need for businesses and other large organizations to update their computer operating systems and security software, cybersecurity experts said.

The attack largely infected networks that used out-of-date software, such as Windows XP, which Microsoft no longer offers technical support for.

“There’s some truth to the idea that people are always going to hack themselves,” said Dan Wire, a spokesman for security firm FireEye. “You’ve got to keep your systems updated.”

The attack that authorities say swept 150 countries this weekend is part of a growing problem of “ransomware” scams, in which people find themselves locked out of their files and presented with a demand to pay hackers to restore their access.

Hackers bait users to click on infected email links, open infected attachments or take advantage of outdated and vulnerable systems. This weekend’s virus was particularly virulent, because it could spread to all other computers on a network even if just one user clicked a bad link or attachment.

Lawrence Abrams, a New York-based blogger who runs BleepingComputer.com, says many organizations don’t install security upgrades because they’re worried about triggering bugs, or they can’t afford the downtime.

Here are five tips to make yourself a less-likely victim:

Make safe and secure backups

Once your files are encrypted, your options are limited. Recovery from backups is one of them. “Unfortunately, most people don’t have them,” Abrams says. Backups often are also out of date and missing critical information. With this attack, Abrams recommends trying to recover the “shadow volume” copies some versions of Windows have.

Some ransomware does also sometimes targets backup files, though.

You should make multiple backups — to cloud services and using physical disk drives, at regular and frequent intervals. It’s a good idea to back up files to a drive that remains entirely disconnected from your network.

Update and patch your systems

The latest ransomware was successful because of a confluence of factors. Those include a known and highly dangerous security hole in Microsoft Windows, tardy users who didn’t apply Microsoft’s March software fix, and malware designed to spread quickly once inside university, business and government networks. Updating software will take care of some vulnerability.

“Hopefully people are learning how important it is to apply these patches,” said Darien Huss, a senior security research engineer for cybersecurity firm Proofpoint, who helped stem the reach of the weekend attack. “I hope that if another attack occurs, the damage will be a lot less.”

The virus targeted computers using Windows XP, as well as Windows 7 and 8, all of which Microsoft stopped servicing years ago. Yet in an unusual step, they released a patch for those older systems because of the magnitude of the outbreak.

“There’s a lot of older Windows products out there that are `end of life’ and nobody’s bothered to take them out of service,” said Cynthia Larose, a cybersecurity expert at the law firm of Mintz Levin.

Use antivirus software

Using antivirus software will at least protect you from the most basic, well-known viruses by scanning your system against the known fingerprints of these pests. Low-end criminals take advantage of less-savvy users with such known viruses, even though malware is constantly changing and antivirus is frequently days behind detecting it.

Educate your workforce

Basic protocol such as stressing that workers shouldn’t click on questionable links or open suspicious attachments can save headaches. System administrators should ensure that employees don’t have unnecessary access to parts of the network that aren’t critical to their work. This helps limit the spread of ransomware if hackers do get into your system.

If hit, don’t wait and see

Some organizations disconnect computers as a precautionary measure. Shutting down a network can prevent the continued encryption — and possible loss — of more files. Hackers will sometimes encourage you to keep your computer on and linked to the network, but don’t be fooled.

If you’re facing a ransom demand and locked out of your files, law enforcement and cybersecurity experts discourage paying ransoms because it gives incentives to hackers and pays for their future attacks. There’s also no guarantee all files will be restored. Many organizations without updated backups may decide that regaining access to critical files, such as customer data, and avoiding public embarrassment is worth the cost.

Ryan O’Leary, vice president of WhiteHat Security’s threat research center, points out that this weekend’s hackers weren’t asking for much, usually about $300.

“If there is a silver lining to it, you’re not out a million dollars,” he said.

Still, “My answer is, never pay the ransom,” Abrams said. “But at the same time, I also know that if you’re someone who’s been affected and you’ve lost all your children’s photographs or you’ve lost all your data or you lost your thesis, sometimes $300 is worth it, you know?”
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Europe’s police agency Europol says a global cyberattack has affected at least 100,000 organizations in 150 countries, with data networks infected by malware that locks computer files unless a ransom is paid.

Speaking to Britian’s ITV, Europol director Rob Wainwright said the healthcare sector in many countries is particularly vulnerable.  

So far there has been no progress reported in efforts to determine who launched the plot.

Computer security experts have assured individual computer users who have kept their PC operating systems updated that they are relatively safe.

They advised those whose networks have been effectively shut down by the ransomware attack not to make the payment demanded — the equivalent of $300, paid in the digital currency bitcoin, delivered to a likely untraceable destination that consists merely of a lengthy string of letters and numbers.  

However, the authors of the “WannaCry” ransomware attack told their victims the amount they must pay would double if they did not comply within three days of the original infection — by Monday, in most cases. And the hackers warned that they would delete all files on infected systems if no payment was received within seven days.

Avast, an international security software firm that claims it has 400 million users worldwide, said the ransomware attacks rose rapidly Saturday to a peak of 57,000 detected intrusions. Avast, which was founded in 1988 by two Czech researchers, said the largest number of attacks appeared to be aimed at Russia, Ukraine and Taiwan, but that major institutions in many other countries were affected.

‘Kill switch’ found

Computer security experts said the current attack could have been much worse but for the quick action of a young researcher in Britain who discovered a vulnerability in the ransomware itself, known as WanaCryptor 2.0.

The researcher, identified only as “MalwareTech,” found a “kill switch” within the ransomware as he studied its structure.

The “kill” function halted WanaCryptor’s ability to copy itself rapidly to all terminals in an infected system — hastening its crippling effect on a large network — once it was in contact with a secret internet address, or URL, consisting of a lengthy alphanumeric string.

The “kill” function had not been activated by whoever unleashed the ransomware, and the researcher found that the secret URL had not been registered to anyone by international internet administrators. He immediately claimed the URL for himself, spending about $11 to secure his access, and that greatly slowed the pace of infections in Britain.

Expects cautioned, however, that the criminals who pushed the ransomware to the world might be able to disable the “kill” switch in future versions of their malware.

Hackers’ key tool

WanaCryptor 2.0 is only part of the problem. It spread to so many computers so rapidly by using an exploit — software capable of burrowing unseen into Windows computer operating systems.

The exploit, known as “EternalBlue” or “MS17-010,” took advantage of a vulnerability in the Microsoft software that reportedly had been discovered and developed by the U.S. National Security Agency, which used it for surveillance activities.

NSA does not discuss its capabilities, and some computer experts say the MS17-010 exploit was developed by unknown parties using the name Equation Group (which may also be linked to NSA). Whatever its source, it was published on the internet last month by a hacker group called ShadowBrokers.

Microsoft distributed a “fix” for the software vulnerability two months ago, but not all computer users and networks worldwide had yet made that update and thus were highly vulnerable. And many computer networks, particularly those in less developed parts of the world, still use an older version of Microsoft software, Windows XP, that the company no longer updates.

The Finnish computer security firm F-Secure called the problem spreading around the world “the biggest ransomware outbreak in history.” The firm said it had warned about the exponential growth of ransomware, or crimeware, as well as the dangers of sophisticated surveillance tools used by governments.

Lesson: Update programs

With WanaCryptor and MS17-010 both “unleashed into the wild,” F-Secure said the current problem seems to have combined and magnified the worst of the dangers those programs represent.

The security firm Kaspersky Lab, based in Russia, noted that Microsoft had repaired the software problem that allows backdoor entry into its operating systems weeks before hackers published the exploit linked to the NSA, but also said: “Unfortunately it appears that many users have not yet installed the patch.”

Britain’s National Health Services first sounded the ransomware alarm Friday.

The government held an emergency meeting Saturday of its crisis response committee, known as COBRA, to assess the damage. Late in the day, Home Secretary Amber Rudd said the NHS was again “working as normal,” with 97 percent of the system’s components now fully restored.

Spanish firm Telefonica, French automaker Renault, the U.S.-based delivery service FedEx and the German railway Deutsche Bahn were among those affected.

None of the firms targeted indicated whether they had paid or would pay the hackers ransom.

 
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In what is believed to be the largest attack of its kind ever recorded, a cyberextortion attack continued causing problems Saturday, locking up computers and holding users’ files for ransom at dozens of hospitals, companies and government agencies. Businesses and computer security organizations await problems in the new workweek.

Ransomware Attack Could Herald Future Problems — Tech staffs around the world worked around the clock this weekend to protect computers and patch networks to block the computer hack whose name sounds like a pop song — “WannaCry” — as analysts warned the global ransomware attack could be just the first of a new wave of strikes by computer criminals.

Worldwide Cyberattack Spreads Further in Second Day — A cyberattack against tens of thousands of data networks in scores of countries, all infected by malware that locks computer files unless a ransom is paid, spread further in its second day Saturday, with no progress reported in efforts to determine who launched the plot.

Authorities Seek Clues On Culprits Behind Global Cyberattack — The British government said on Saturday it does not yet know who was behind a massive global cyberattack that disrupted Britain’s health care services, but Interior Minister Amber Rudd said the country’s National Crime Agency is investigating where the attacks came from.

Europol Working on Probe Into Massive Cyberattack — The European Union’s police agency, Europol, says it is working with countries hit by the global ransomware cyberattack to rein in the threat and help victims.

‘Perfect Storm’ of Conditions Helped Cyberattack Succeed — The cyberextortion attack that hit dozens of countries spread quickly and widely thanks to an unusual confluence of factors: a known and highly dangerous security hole in Microsoft Windows, tardy users who didn’t apply Microsoft’s March software fix, and a software design that allowed the malware to spread quickly once inside university, business and government networks.

Where Global Cyberattack Has Hit Hardest — A look at some of the countries and organizations hardest hit during the global cyberattack.

What Is the Digital Currency Bitcoin? — In the news now after a cyberextortion attack this weekend, bitcoin has a fuzzy history, but it’s a type of currency that allows people to buy goods and services and exchange money without involving banks, credit card issuers or other third parties.

 
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Here is a look at some of the places hit by the global cyberattack.

European Union — Europol’s European Cybercrime Center, known as EC3, said the attack “is at an unprecedented level and will require a complex international investigation to identify the culprits.”

Britain — Britain’s home secretary said the “ransomware” attack hit one in five of 248 National Health Service groups, forcing hospitals to cancel or delay treatments for thousands of patients — even some with serious aliments like cancer.

Germany — The national railway said Saturday departure and arrival display screens at its train stations were affected, but there was no impact on actual train services. Deutsche Bahn said it deployed extra staff to help customers.

Russia — Two security firms — Kaspersky Lab and Avast — said Russia was hit hardest by the attack. The Russian Interior Ministry, which runs the country’s police, confirmed it was among those that fell victim to the “ransomware,” which typically flashes a message demanding payment to release the user’s data. Spokeswoman Irina Volk was quoted by the Interfax news agency Saturday as saying the problem had been “localized” and that no information was compromised. Russia’s health ministry said its attacks were “effectively repelled.”

United States — In the U.S., FedEx Corp. reported that its Windows computers were `”experiencing interference” from malware, but wouldn’t say if it had been hit by ransomware. Other impacts in the U.S. were not readily apparent.

Turkey — The head of Turkey’s Information and Communication Technologies Authority or BTK says the nation was among those affected by the ransomware attack. Omer Fatih Sayan said the country’s cyber security center is continuing operations against the malicious software.

France — French carmaker Renault’s assembly plant in Slovenia halted production after it was targeted. Radio Slovenia said Saturday the Revoz factory in the southeastern town of Novo Mesto stopped working Friday evening to stop the malware from spreading.

Brazil — The South American nation’s social security system had to disconnect its computers and cancel public access. The state-owned oil company Petrobras and Brazil’s Foreign Ministry also disconnected computers as a precautionary measure, and court systems went down, too.

Spain — The attack hit Spain’s Telefonica, a global broadband and telecommunications company.
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Tech staffs around the world worked around the clock this weekend to protect computers and patch networks to block the computer hack whose name sounds like a pop song — “WannaCry” — as analysts warned the global ransomware attack could be just the first of a new wave of strikes by computer criminals.

The United States suffered relatively few effects from the ransomware that appeared on tens of thousands of computer systems across Europe and into Asia, beginning Friday. Security experts remained cautious, however, and stressed there was a continuing threat.

In contrast to reports from several European security firms, a researcher at the Tripwire company on the U.S. West Coast said late Saturday that the attack could be diminishing.

“It looks like it’s tailing off,” said Travis Smith of Tripwire.

“I hope that’s the case,” Smith added. The Oregon firm protects large enterprises and governments from computer security threats.

Ransomware attack

The code for the ransomware unleashed Friday remains freely available on the internet, experts said, so those behind the WannaCry attack — also known as WanaCryptor 2.0 and a variety of other names — could launch new strikes in coming days or weeks. Copycat attacks by other high-tech criminals also are possible.

“We are not out of the woods yet,” said Gary Davis, chief consumer security evangelist at McAfee, the global computer security software company in Santa Clara, California. “We think it’s going to be the footprint for other kinds of attacks in the future.”

The attack hit scores of countries — more than 100, by some experts’ count — and infected tens of thousands of computer networks.

Industry reports indicate Russia, Taiwan, Ukraine and Britain were among the countries hit hardest, and more hacking reports can be expected when offices reopen for the new workweek Monday or, in some parts of the world, Sunday.

One of the weapons used in the current attack is a software tool reportedly stolen from the U.S. National Security Agency and published on the internet by hackers last month.

The tool affords hackers undetected entry into many Microsoft computer operating systems, which is what they need to plant their ransomware. However, Microsoft issued patches to fix that vulnerability in its software weeks ago that could greatly reduce the chances of intrusion.

Outdated operating systems

The crippling effects of WannaCry highlight a problem that experts have long known about, and one that appears to have hit developing countries harder.

Some organizations are more vulnerable to intrusion because they use older or outdated operating systems, usually due to the cost of upgrading software or buying modern hardware needed to install better-protected operating systems. Companies like Microsoft eventually stop updating or supporting older versions of their software, so customers using those programs do not receive software patches or security upgrades.

Much of the ransomware’s spread around the world occurred without any human involvement. The WannaCry malware self-propagates, copying itself to all computers on a network automatically.

When a demand for ransom payments appears on a user’s screen — $300 at first, doubling to $600 in a few days — it’s usually too late: All files on that computer have been encrypted and are unreadable by their owners.

The hackers said they would reverse the effect of their software once they received the payments they demanded.

Microsoft patched the “hole” in the newest versions of its operating software — Windows 10 for most home users — in March, three weeks before the stolen NSA exploit software was published on the internet. Since Friday, the company dropped its refusal to update old versions of its programs and issued patches specifically written for use in Windows XP and several other systems.

Microsoft declined a request for an interview, but a statement on the company’s blog said: “Seeing businesses and individuals affected by cyberattacks, such as the ones reported today, was painful. We are taking the highly unusual step of providing a security update for all customers to protect Windows platforms that are in custom support only, including Windows XP, Windows 8, and Windows Server 2003.”

“A lot of people in the security community were impressed with Microsoft’s speed, but it highlights an ongoing challenge we have,” said Stephen Cobb, a senior security researcher with ESET, a global security software company. “If a malicious code outbreak breaks out tomorrow, and targets unsupported operating systems, Microsoft may have to go there again.”
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The British government said on Saturday it does not yet know who was behind a massive global cyberattack that disrupted Britain’s health care services and targeted vital computer systems in as many as 100 other countries.

British Interior Minister Amber Rudd said Britain’s National Cyber Security Center was working with the country’s health service to ensure the attack that began Friday was contained and limited.

She said Britain’s National Crime Agency was still working with her ministry to find out where the attacks came from and that the British government did not know if the attacks had been directed by a foreign government.

What appeared to be the biggest cyberextortion attack in history exploited a vulnerability in Microsoft Windows that was identified in leaked documents by the U.S. National Security Agency earlier this year.

With more than 75,000 attacks launched on Friday, cybercrime experts around the world were investigating a concentration of attacks in Russia, Ukraine, and India — countries where the use of older, unpatched versions of Microsoft Windows is widespread.

The hackers attempt to trick victims into opening malicious attachments to spam e-mails by saying they contained invoices, job offers, security warnings, and other seemingly legitimate files.

The extortionists demand payments of $300 to $600 to restore access once computers are crippled by the scam. Cybersecurity firms said criminal organizations were probably behind the attack.

Russia’s Interior Ministry, Emergencies Ministry, and biggest bank, Sberbank, were all targeted, officials said.

The Interior Ministry said on its website that around 1,000 computers had been infected, but it had localized the virus. Russia’s Investigative Committee denied reports that it was attacked.

Russia’s Health Ministry and Emergencies Ministry told Russian news agencies that they had repelled the cyberattacks, while Sberbank said its cybersecurity arrangements had prevented viruses from entering its systems.

Russia’s Central Bank said Saturday that it detected massive cyberattacks on domestic banks, but the resources of the Central Bank itself were “not compromised.”

Megafon, a top Russian mobile operator, said it had come under attacks that appeared similar to those that crippled U.K. hospitals. A spokesman said mobile communications weren’t affected but the attacks interrupted the work of its call centers.

Hospitals ‘Crippled’

Spain and the United Kingdom were hit particularly hard. Hospitals across Britain found themselves without access to their computers or phone systems. Many canceled routine procedures and asked patients not to come to the hospital unless it was an emergency. 

British Prime Minister Theresa May said that, while some hospitals were crippled, there was no evidence patient data had been compromised.

Spain’s giant Telefonica telecommunications company was hit, prompting Spanish authorities to take measures to protect critical infrastructure in transportation, energy, telecommunications, and financial services.

Only a small number of U.S. organizations were hit because the hackers appear to have begun their campaign in Europe, cybersecurity firms said.

By the time the hackers turned their attention to the United States, spam filters had identified the new threat and flagged the ransomware-laden emails as malicious.

The security holes exploited by the hackers were disclosed several weeks ago by TheShadowBrokers, a mysterious group that has published what it says are hacking tools used by the White House security agency as part of U.S. intelligence-gathering.

Microsoft said it was pushing out automatic Windows updates to defend clients from the virus.

Some material for this article came from AP, BBC, AFP, Reuters, Tass and Interfax.
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In what is believed to be the largest attack of its kind ever recorded, a cyberextortion attack struck in dozens of countries Friday, locking up computers and holding users’ files for ransom at dozens of hospitals, companies and government agencies.

Massive Cyberattack Hits Organizations Around Globe — An aggressive wave of cyberattacks has hit companies and public institutions around the globe, causing international havoc and bringing many services to a standstill. The cyberextortion attempt appeared to use stolen software developed by a U.S. spy agency.

What You Need to Know About Ransomware — What is ransomware? How does it infect your computer? How is the U.S. government’s National Security Agency involved? How to keep your computer safe.

Global Cyberattack Fuels Concern About US Vulnerability Disclosures — A global cyberattack on Friday renewed concerns about whether the U.S. National Security Agency and other countries’ intelligence services too often horde software vulnerabilities for offensive purposes, rather than quickly alerting technology companies to such flaws.

Companies Affected by Global Cyber Attack — A global cyber attack on Friday affected British hospitals, government agencies and companies, such as FedEx Corp., Telefonica SA, Portugal Telecom and Telefonica Argentina, in 99 countries, with Russia, Ukraine and Taiwan the top targets.

Don’t Click: What Is the ‘Ransomware’ WannaCry Worm? — What is so special about WannaCry?
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Malicious software called “ransomware” has forced British hospitals to turn away patients and affected Spanish companies such as Telefonica as part of a global outbreak that has affected tens of thousands of computers.

How does it work?

WannaCry — also known as WanaCrypt0r 2.0, WannaCry and WCry — is a form of “ransomware” that locks up the files on your computer and encrypts them in a way that you cannot access them anymore.

How does it spread?

Ransomware is a program that gets into your computer, either by clicking on the wrong thing or downloading the wrong thing, and then it holds something you need to ransom.

In the case of WannaCry, the program encrypts your files and demands payment in bitcoin in order to regain access.

Security experts warn there is no guarantee that access will be granted after payment. Some ransomware that encrypts files ups the stakes after a few days, demanding more money and threatening to delete files altogether.

There are different variants of what happens: Other forms of ransomware execute programs that can lock your computer entirely, only showing a message to make payment in order to log in again. There are some that create pop-ups that are difficult or impossible to close, rendering the machine difficult or impossible to use.

Where has it spread?

British-based cyber researcher Chris Doman of AlienVault said the ransomware “looks to be targeting a wide range of countries,” with initial evidence of infections in at least two dozen nations, according to experts from three security firms.

The broad-based ransomware attack has appeared in at least eight Asian nations, a dozen countries in Europe, Turkey and the United Arab Emirates and Argentina, and appears to be sweeping around the globe, researchers said.

What is so special about WannaCry?

WannaCry is not just a ransomware program, it is also a worm.

This means that it gets into your computer and looks for other computers to try and spread itself as far and wide as possible.

Ransomware has a habit of mutating, so it changes over time in order to find different ways to access computers or to get around patches (operating system updates that often include security updates). Many security firms are already aware of WannaCry in past forms and most are looking at this one right now to see how it might be stopped.

Several cybersecurity firms said WannaCry exploits a vulnerability in Microsoft and that Microsoft patched this in March. People don’t always install updates and patches on their computers, and so this means vulnerabilities can remain open a lot longer and make things easier for hackers to get in.

It exploited a vulnerability in the Windows operating system believed to have been developed by the National Security Agency, which became public last month. It was among a large number of hacking tools and other files that a group known as the Shadow Brokers released on the internet. Shadow Brokers said that they obtained it from a secret NSA server.

The identity of Shadow Brokers is unknown, though many security experts believe the group that surfaced in 2016 is linked to the Russian government.

The NSA and Microsoft did not immediately respond to requests for comment.
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An aggressive wave of cyberattacks hit companies and public institutions around the globe Friday, causing international havoc and bringing many services to a standstill. Computers were locked up and users’ files held for ransom when dozens of countries were hit in a cyberextortion attack that targeted hospitals, companies and government agencies.

What is ransomware?

Ransomware is a type of malware that attempts to extort a computer user for money. In some cases, the ransomware encrypts certain files and holds them hostage. In other cases, as happened Friday, it locks a user out of their entire computer system until a ransom is paid. Some ransomware that encrypts files increases the stakes after a few days, demanding more money and threatening to delete files altogether.

Steps of ransomware infection

A ransomware infection usually takes these five steps.

1. The user downloads malware from an infected website or email.

2. The initial malware hijacks the user’s browser and redirects it to a malicious site.

3. Part of the malware, called an exploit kit, looks for vulnerabilities in the user’s system.

4. Once a vulnerability is found, a malicious payload is downloaded onto the victim’s computer.

5. Then the malware calls home with sensitive data from the user’s computer. In the case of ransomware, the malware attempts to extort the user for money.

The ransomware program that spread Friday is not just malware, it is also a worm. This means that the malware gets into a computer and looks for other computers to try and spread itself as far as possible.

Do ransomware attacks generate money for the hackers?

Yes, they can. A hospital system in Los Angeles paid about $17,000 earlier this year following an attack that blocked hospital employees from using email and other forms of electronic communication by using encryption to lock them out of the system. The hackers even set up a help line to answer questions about paying the ransom.

Security industry experts say such attacks are becoming more prevalent, but are rarely made public.

How is the NSA involved?

The hackers appear to have used a technique that was discovered by the National Security Agency and was leaked online in April by a group calling itself the Shadow Brokers.

The malware is exploiting a flaw in Microsoft software. Microsoft created a patch to fix the flaw earlier this year, but not all businesses have updated their operating systems.

Who carried out the attack?

Investigators are pursuing information, but have not said if they have any strong leads. Officials say they believe the attack is the work of criminals and not a foreign government. The original hacking tool was apparently stolen from the NSA and leaked online by the Shadow Brokers, but officials do not know who that group is or whether they carried out this attack.

How to keep your computer safe

Microsoft released a patch in March that fixes the specific vulnerability exploited in this attack. The U.S. Department of Homeland Security is urging people to take three steps.

1. Update your systems to include the latest patches.

2. Do not click on or download unfamiliar links or files in emails.

3. Back up your data to prevent possible loss.
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An aggressive wave of cyberattacks has hit companies and public institutions around the globe, causing international havoc and bringing many services to a standstill. The cyberextortion attempt appeared to use stolen software developed by a U.S. spy agency.

One of the first and worst attacks was aimed at Britain’s National Health Service. A wave of crippling ransomware hit dozens of hospitals across the country Friday, prompting the NHS to declare a “major incident.” Some hospitals diverted ambulances and canceled surgeries as a result of the attack, which blocked doctors’ access to patients’ files.

Ransomware is a type of computer malware, software that has a malevolent intent, that infects a target system, locks and encrypts all files, and then demands a cash payment from the victim in return for reversing the encryption.

A researcher at the Finnish cybersecurity company F-Secure said Friday’s apparently coordinated attacks were “the biggest ransomware outbreak in history,” The Associated Press reported. An analyst at another cybersecurity firm, Veracode, said the rapid spread of attacks pointed to the involvement of criminal organizations.

45,000 attacks in 74 countries

The international cybersecurity firm Kaspersky Labs, based in Russia, said it recorded 45,000 attacks in 74 countries. The worst hit by far was Russia, with serious problems also reported by computer networks in Taiwan, India and Ukraine.

The Russian Interior Ministry, which oversees police throughout the world’s largest country, at first denied it had been hacked, but later admitted about a thousand of its computers had been penetrated.

There was no immediate word on who carried out the cyberattacks, and it was not known whether any of the victims paid any ransom Friday.

The demands reportedly were for relatively trivial sums — the equivalent of $300, paid in bitcoin, a digital currency. But in past attacks, the payment demands multiplied to much larger sums in short order. Bitcoin payments can be difficult if not impossible to trace.

The ransomware used Friday was labeled with various names — WannaCryptOr, WannaCry or WCry — but all appeared to operate in a similar way. They gained entry to targeted computer systems by exploiting a vulnerability in Microsoft computer operating systems that was discovered and developed by the U.S. National Security Agency.

The security hole, known as “EternalBlue,” was stolen from U.S. government computers and disclosed on the internet earlier this year by a group known as TheShadowBrokers.

Microsoft fixed problem in March

Microsoft issued software patches to close the vulnerability in its operating systems two months ago, but many computer systems around the world have not yet been updated, or instead rely on older equipment that remains vulnerable to attack.

Security experts said the ransomware encountered Friday is a self-replicating piece of software that spreads from computer to computer as it finds systems that have not been shielded from intrusion. The malware enters large organizations’ computer networks, such as those at British hospitals, when an employee clicks on an innocent-appearing attachment to open the file, and thus releases the ransomware.

British Prime Minister Theresa May said it was clear that her nation’s problems were part of a wider international attack that had many victims.

China also was targeted by the unknown computer hackers, and the U.S. parcel delivery firm FedEx said its operations were hit. In Spain, telecommunications giant Telefónica was one of the early victims, and employees of MegaFon, one of the largest cellphone companies in Russia, said they also were hit.

NSA technique used

Computer experts said the ransomware did not to appear to be very sophisticated, but the way in which it spread, using the intrusion technique developed by NSA, clearly was. They noted the ransom demands that flashed onto users’ screens were in dozens of languages, indicating the attack had been well planned and coordinated.

Ransomware attacks and other computer intrusions, such as the hacking incident that unfolded in France last week on the eve of that country’s presidential election, are on the rise throughout the world.

Last year, a hospital in Los Angeles, California, said it paid a $17,000 ransom to regain control of its computers from hackers.
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