The ransomware attack that has spread worldwide in recent days exploits a weakness in outdated versions of Windows, the same systems that still run many US refineries, offshore platforms and other energy facilities.
More than 75,000 similar attacks reportedly happened in nearly 100 countries, with Russia, Ukraine and Taiwan hardest hit, according to the cybersecurity firm Avast.
"Small business owners should be pro-active about their cyber security in the wake of this ransomware campaign affecting computers around the world", Tehan said.
Dr Dreyfus said Windows computers that don't have the latest security patches were vulnerable to the bug, urging Australians to ensure their antivirus software was up to date.
But he warned it was likely some Australians would fall victim.
Mr Turnbull's cyber security advisor, Alastair MacGibbon, said none of Australia's government agencies or health systems had been hit.
French police said there were "more than 75,000 victims" around the globe, but cautioned that the number could increase "significantly".
Microsoft in March released a patch for the SMB vulnerability exploited by WanaCrypt. Because numerous computers impacted run older Windows systems like XP, Microsoft issued a rare patch for XP, which it had stopped updating more than three years ago.
Britain's National Health Service said about a fifth of NHS trusts - the regional bodies that run hospitals and clinics - were hit by the attack on Friday, leading to thousands of canceled appointments and operations. Researchers have since linked the code to the North Korea.
Canadian woman's cutout of Spicer in bush gets attention
On Saturday's "SNL" we saw how comedy can humanize our view of a person, as McCarthy turned Spicer into a sympathetic character. McCarthy's Spicer and Baldwin's Trump flirted, with Trump tickling Spicer and Spicer declaring he had a wife.
Ten Dundee medical centres were hit by Friday's worldwide cyber-attack, causing severe disruption to patient services.
While investigations continue, other cyber security companies are warning that this is just the tip of the iceberg.
Dame Fiona and the Care Quality Commission wrote to Mr Hunt to highlight a "lack of understanding of security issues", the newspaper said, and that "the external cyber threat is becoming a bigger consideration".
"The worst case scenario is for state-actors to use the vulnerability to install backdoors in other governments' public institutions".
Before Friday's attack, Microsoft had made fixes for older systems, such as 2001's Windows XP, available only to mostly larger organizations that paid extra for extended technical support.
In the United States, package delivery group FedEx said it was "implementing remediation steps as quickly as possible", while French carmaker Renault was forced to stop production at sites in France, Slovenia and Romania.
The attack first ravaged Britain's hospital systems and then spreading globally.
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.
It is essential that people take precautions to prevent cyber crime and make it as hard as possible for the thieves to succeed but the criminals also need to know they run a serious risk of being brought to justice.
- Ces joueurs d’origine africaine évoluant pour des nations européennes
- Corée du Sud : Moon Jae-In élu président
- 1 woman killed in downtown Pittsburgh high-rise fire
- La traque des pirates informatiques est lancée — Cyberattaque mondiale
- Vers une réduction de 10% des effectifs — Ford
- Murder Investigation Launched After Woman's Body Found In Fermanagh
- John Terry to start for Chelsea against Watford
- It's time to get rid of Mother's Day: Teitel
- Offre de Marc de Lacharrière sur le solde du capital — Fimalac
- Idaho man in custody following Amber Alert