Wannacry –Cyberattack

Wannacry –Cyberattack.

Malicious software or "ransomware" has been used in a massive hacking attack, affecting tens of thousands of computers worldwide. Software security companies said a ransomware worm called "WannaCry" infected about 200,000 computer systems in 150 countries on Friday, with Russia, Ukraine, and Taiwan being the top targets.

The hack forced British hospitals to turn away patients, affected Nissan in UK, Spanish companies such as Telefonica, and threw other government agencies and businesses into chaos.
Cyber security researchers from Symantec and Kaspersky Lab have said that some code in an earlier version of the WannaCry software had appeared in programmes used by the Lazarus Group, which researchers from many companies have identified as a North Korea-run hacking operation.
How it works:

WannaCry is a form of ransomware that locks up files on your computer and encrypts them in a way that you cannot access them anymore. It targets Microsoft's widely used Windows operating system. When a system is infected, a pop-up window appears with instructions on how to pay a ransom amount of $300.

The pop-up also features two countdown clocks; one showing a three-day deadline before the ransom amount doubles to $600; another showing a deadline of when the target will lose its data forever. Payment is only accepted in bitcoin.

How it spreads:

Ransomware is a programme that gets into your computer, either by clicking or downloading malicious files. It then holds your data as ransom. Some security researchers say the infections in the case of WannaCry seem to be deployed via a worm, spreading by itself within a network rather than relying on humans to spread it by clicking on an infected attachment.