BBC analysis of three Bitcoin accounts linked with the attack suggests the hackers have been paid the equivalent of £22,080 so far.
Last Friday, stolen NSA malware was used to attack hospitals, universities, and businesses around the world, ultimately hitting hundreds of thousands of computers in more than 150 countries, including the US, reaching what Europol-Europe's leading police agency-described as an "unprecedented level". It encrypts data on infected computers and demands payment before the information is unencrypted.
"It was clear that warnings were given to hospital trusts but this is not something that focused on attacking the NHS here in the United Kingdom", she told reporters on Monday.
Meanwhile, new versions of the ransomware have reportedly surfaced, including one without the kill switch exploited by a 22-year-old computer security researcher to shut the attack down.
Computers around the globe were hacked beginning on Friday using a security flaw in Microsoft's Windows XP operating system, an older version that was no longer given mainstream tech support by the U.S. giant. The software vulnerability was purportedly first identified by the NSA for its own intelligence-gathering work.
Update Antivirus on all your systems and download Microsoft's latest software patches.
Company president and chief legal officer Brad Smith in a blog post criticized what he called the "stockpiling" of risky software code by governments which could be exploited by hackers.
He added: "The governments of the world should treat this attack as a wake-up call".
On Sunday, Europol had disclosed that 200,000 computers had been infected with the virus, an attack the agency described as "unprecedented". This is because the hackers generally target Windows more because there are more computers running on the Windows OS than Apple's OS.
"We have also been offering advice and assistance to GP surgeries, who will open as usual tomorrow".
Tim Stevens, a lecturer in global security at King's College London, warned that the incident should be a wakeup call to both the public and private sectors to incorporate security into computer systems from the ground up, rather than as an afterthought.
Although no hospitals in the county were affected by last Friday's attack, the decision to close the IT systems was taken as a precautionary measure.
These updates need to be taken seriously.
"This means that security fixes are no longer produced, leaving systems exposed to common types of cyber-attack". Since most offices in India will resume operations today, the threat is greater when employees get back on their respective systems.
"Losses will not only be financial".
Hundreds of thousands of computers have been affected so far. Russian Federation was the country worst affected, with computers at the nation's interior ministry getting targeted. Nearly 30,000 Chinese companies and institutions, including several major firms in Hong Kong, have been crippled by the global cyber attack. But successive generations of the operating system have been found wanting. You can WhatsApp us on +1 347-322-0415.
How often do you update your computer's operating software? Users have been cautioned for not opening attachments or click on links that they did not trust.
Editor's note: Are you affected by the attack? Additionally, it has been advised that hacked computers should be reported to the authorities immediately, and users should not pay the "ransom", as there is absolutely no guarantee that your system will be unlocked once you do pay up.