Vicente Diaz, a security analyst at Kaspersky, said big companies would have spent the weekend implementing such measures, but smaller firms without a dedicated security team could still suffer from the malware.
That was the chilling prediction made yesterday by Ron Wainwright, the English-born head of the EU's crimefighting organisation Europol.
Ransomwear attacks work by locking the computer and encrypting all the data. But many users did not apply the software patch, AP reported.
- How can people protect their computers?
The indiscriminate attack, which began Friday, struck banks, hospitals and government agencies, exploiting known vulnerabilities in old Microsoft computer operating systems.
The patches won't do any good for machines that have already been hit. "And I think it's going to grow", said former director of National Intelligence, James Clapper in an interview with ABC.
Telefónica: Spanish authorities confirmed the Spanish telecom company Telefónica was one of the targets, though the attack affected only some computers and did not compromise the security of clients' information.
The first thing you need to know about WanaCrypt0r 2.0 (also known as WannaCry, Wcry, or Wanna Decryptor) is that it's a type of malicious software called ransomware.
NHS Grampian said it remains "completely confident" no patient data was accessed in the ransomware attack, which hit 13 health boards across the country and countless nationwide, leaving some with a backlog of postponed appointments to contend with.
"Remarkably few payments so far have been made, so most people are not paying this", Wainwright said.
Turkey president: Trump arming Syrian Kurds a 'mistake'
A first consignment of weapons is already in place for delivery and could be dispatched to the YPG "very quickly", U.S. Turkish President Recep Tayyip Erdogan is to visit President Donald Trump in Washington next Tuesday.
WannaCry has already caused massive disruption around the globe.
England's National Health Service said 47 organisations providing care had been hit and on Sunday afternoon seven hospitals were continuing to divert patients from the emergency room.
Sir Michael told the BBC's Andrew Marr Show: "We never comment on the different systems, obviously for reasons of security, that our submarines use but our vanguard submarines I can absolutely assure you, are safe and operate in isolation when they are out on patrol, and I have complete confidence in our nuclear deterrent".
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. State media reported that digital payment systems at some gas stations were offline, forcing customers to pay cash.
The ransomware exploited a security flaw in Microsoft's Windows operating system.
"These ransomware attacks have been on the rise over the last three years, it wasn't exactly something that was a shock - what was surprising is the scale of this one".
Interior Ministry: The Russian Interior Ministry acknowledged a ransomware attack on its computers, adding that less than 1% of computers were affected.
Victims have paid about $30 000 in ransom so far, with the total expected to rise substantially next week, said Tom Robinson, chief operating officer and co-founder of Elliptic Enterprises, a ransomware consultant that works with banks and companies in the United Kingdom, the U.S. and Europe.
Consumers who have up-to-date software are protected from this ransomware.
Windows 10 S is a streamlined version of Microsoft's operating system geared for students and educators. However, you can not change your default web browser as Microsoft Edge will remain the default choice.
We'll be making highlights of the game available for FREE shortly after the final whistle on BTSport.com and on the BT Sport app. When George Kruis battered his way over nine minutes later for Saracens' second try Clermont looked in danger of being swamped.
The discussion on such topic came "very timely, unfortunately", Italian Finance Minister Pier Carlo Padoan noted at the meeting. In concrete terms, the ministers mandated experts to continue their work on assessing the nature of the threat.
By doing so, Trump jeopardized cooperation from an ally familiar with the inner workings of the Islamic State group. Reaction from Democrats on the House and Senate intelligence committees was full-throated.
Valdez's brother Rafael said the reporter had been "very happy" in recent days and had not indicated that he had received threats. His death makes him the fifth reporter to be killed in Mexico in the past three months.
Comac says more than 200 Chinese companies and 36 universities have been involved in research and development of the C919. The smaller regional jet is a rival to aircraft made by Bombardier Inc. of Canada and Brazil's Embraer SA.
But mutual distrust between Palestinians and Israelis will be a formidable, if not impossible, barrier for Trump to overcome. He said there could not be lasting peace unless Palestinian leaders spoke in a unified voice against "violence and hate".
Cries of "Bharat mata ki jai" rented the air along with others condemning Pakistan and militant groups in the Valley. The killing of young Kashmiri has sparked outrage in the country with the Army vowing to punish his killers.
Since tournament moved to TPC Sawgrass in 1982, the best opening round by a defending champion is 68 by Craig Perks in 2003. The 12th hole was certainly more appealing this year than the blind second shot it used to present.
Saturday will be the 21-year-old's fifth start of the season after being called up from advanced Single-A Palm Beach last week. Rookie Magneuris Sierra has provided a spark, since he came up, hitting.353, and scoring seven runs, in four games.
Warriors' Kerr returns to practice for 1st time in 3 weeks
Brown will continue as acting coach but said Kerr has joined the coaching staff for early meetings the past few days. Kerr has not manned the Warriors bench since Game 2 of their first round series against the Portland Trail Blazers.
For LeBron, another Cavs' sweep is within reach
Warriors will try to close out the best-of-seven Western Conference second-round series in game four on Monday in Salt Lake City . At the start of the second half Hayward knocked down a three, the Jazz got some stops and makes, but could never pull away.
Athletes at forefront of Los Angeles 2024 plan
A tour began at the famous Staples Center arena, the downtown home of the Los Angeles Lakers NBA team. Paris , which last staged the Olympics in 1924, failed in bids for the 1992, 2008, and 2012 Games.
Melissa McCarthy adds spice (and Spicer) as host of 'SNL'
The sketch as a whole went on a little too long, but McCarthy kept it amusing . "Wait, did I get him? ". "Kiss me", Trump replies. When Spicer and the White House's lack of credibility are the central focus of an SNL sketch, the problem has gone mainstream.
Russia: Syria deal bans US-led coalition aircraft
Syrian, Russian, Turkish and US-led coalition aircraft operate in overlapping areas across Syrian airspace. The U.S. was not part of negotiating the deal and it said there is "reason to be cautious".
Alonso's engine fails in practice for Barcelona GP
Only the previous day, the 35-year-old said he would only stay with the team if they gave him a auto capable of fighting for wins. With its rougher surface and tricky curves, the track gives slower cars like his McLaren a fighting chance.