Fresh barrage of cyber attacks set to hit today

"We have not yet seen Friday's attack reoccur, there's been no new wave of attacks".

Security experts tempered the alarm bells by saying that widespread attacks are tough to pull off.

Darien Huss, a 28-year-old research engineer who assisted the anonymous British researcher lauded a hero, said he was "still anxious for what's to come in the next few days because it really would not be so hard for the actors behind this to re-release their code without a kill switch or with a better kill switch".

He said Europol and other agencies did not yet know who was behind the attack but that "normally it is criminally minded and that is our first working theory for obvious reasons".

A cyber-attack that has hit 150 countries since Friday should be treated by governments around the world as a "wake-up call", Microsoft says. Europol, the European Union's police agency, said the onslaught was at "an unprecedented level and will require a complex worldwide investigation to identify the culprits".

The software holds users hostage by freezing their computers, encrypting their data and demanding money through online bitcoin payment - US$300 at first, rising to US$600 before it destroys files hours later.

The attacks used ransomware that apparently exploited a security flaw in Microsoft operating systems, locking users' files unless they pay the attackers a designated sum in the virtual currency Bitcoin. Experts are urging all organizations to update their software.

The attack, Smith says, "represents a completely unintended but disconcerting link between the two most serious forms of cybersecurity threats in the world today - nation-state action and organized criminal action".

Microsoft fixed MS17-010 in its March release, but it is likely that the NHS and other affected entities did not patch their devices in time to counter the attack.

Russian Railways: State media said a virus attacked the IT system of Russian Railways, but it did not affect operations due to a prompt response.

About 97 percent of United Kingdom facilities and doctors disabled by the attack were back to normal operation, Home Secretary Amber Rudd said Saturday after a government meeting. Fox 4 even received warnings like this.

A computer screen shows an error message after Britain's National Health Service was hacked.

Wainwright said the agency is analyzing the virus and has yet to identify who is responsible for the attack. The server operates as a "sinkhole" to collect information about malware - and in Friday's case kept the malware from escaping.

His move may have saved governments and companies millions of dollars and slowed the outbreak before US-based computers were more widely infected.

"One thing that is very important to note is our sinkholing only stops this sample and there is nothing stopping them removing the domain check and trying again, so it's incredibly important that any unpatched systems are patched as quickly as possible", MalwareTech warned.

Short of paying, options for those already infected are usually limited to recovering data files from a backup, if available, or living without them.

In the US, where the effects haven't appeared to be widespread, investigators believe additional companies have been attacked but have not yet come forward to report it, a law enforcement official told The Associated Press.

The software tools to create the attack were revealed in April among a trove of NSA spy tools that were either leaked or stolen.

British cybersecurity expert Graham Cluley doesn't want to blame the NSA for the attack.

He warned governments against stockpiling code that could be used in this way left it fall into the wrong hands and said instead they should point out the vulnerabilities to manufacturers.

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