The global wave of cyberattacks has allegedly been traced to its source: Ukraine.
It's not a killswitch, but here are preventative steps you can take to secure your computers against Petya.
'Petya' ransomware took the world by storm, locking computers and demanding money.
The latest ransomware attack comes just over a month after WannaCry crippled businesses in 150 nations in May.
Huge ransomware cyberattack is spreading across Europe - who's been hit so far?
The ransomware outbreak hit systems across the world and locked down files.
ATMs across Ukraine have been hijacked by ransomware, as thousands of computers go offline.
Petya ransomware is believed to be behind an ongoing cyberattack against thousands of computers across Europe.
The strain of ransomware appears to be Petya, which locks down vital system files.
The encrypted messaging app has been accused of aiding terrorism.
Security experts said that it took a month before the hospital's IT systems were fully restored.
Windows XP was one of the OS targeted in the massive WannaCry ransomware attack in May.
Following a previous agreement with the US, Chinese state hacking fell by up to 90%.
UK security services talk tough on cybersecurity, but MPs still can't use passwords.
The ransomware is reportedly primarily targeting users in the US.
The alleged cyberattack was not sophisticated - and likely too brash for a nation state.
Growing numbers of IoT devices within the energy industry's technology have also increased risk of potential attacks.
The hacktivist collective's video reportedly cites articles from a conspiracy website.
Hackers reportedly breached less than 1% of parliament's 9,000 email addresses.
John Kasich's website was apparently hacked by Team System Dz on Sunday.
BlackTech hackers are involved in multiple cyberespionage campaigns against targets in Taiwan, Japan and Hong Kong.
Fears of MPs being blackmailed emerge after hackers launched a 'sustained and determined' cyberattack on Parliament.
Officials and security experts said these reviews could allow Russia to find vulnerabilities in the code.
The dumped data is reportedly believed to have been stolen from Microsoft's in-house systems.
'Marcher' banking Trojan uses 'overlay' tactics to steal your credentials - and its evolving.
GhostHook allows hackers to plant rootkits onto systems previously thought to be impenetrable.
Sheryl Sandberg will reportedly tell UK home secretary WhatsApp chats are off-limits.
The log-in credentials of 7,000 police employees and over 1,000 Foreign Office officials were also found online.
Kremlin hackers reportedly stole around 90,000 voter records from the state of Illinois alone.
Check Point said 'Fireball' could cause 'a global catastrophe'. Microsoft hit back.