Who Did WannaCry Attack?

by | Last updated on January 24, 2024

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On 18 December 2017, the United States Government formally announced that it publicly considers

North Korea

to be the main culprit behind the WannaCry attack.

What impact did the WannaCry attack have?

The infected hospitals also saw a decrease in the number of ED attendances with 3800 fewer patients seen. There was a significant impact on the

number of outpatient cancellations

across the infected hospitals during the WannaCry week—this resulted in 13,500 appointments being cancelled.

What did the WannaCry cyber attack do?

WannaCry is a ransomware worm that spread rapidly through across a number of computer networks in May of 2017. After infecting a Windows computers, it

encrypts files on the PC’s hard drive, making them impossible for users to access, then demands a ransom payment in bitcoin in order to decrypt them.

How many computers were affected by WannaCry?

The now-infamous WannaCry ransomware attack that started on May 12th, 2017, spread to

over 200,000 computers

across 150 countries.

Is WannaCry still a threat?

It’s true that

WannaCry is no longer trending

. New (or recycled) malware strains, such as Maze, Netwalker, RagnarLocker or Ryuk (not to mention the recently fallen Emotet), appear far more active and threatening.

How was WannaCry stopped?

In the first few hours of the attack, he

noticed that the malware’s code sent a signal to an unregistered website every time it infected a new system

. He registered the site and the attacks slowed. Then they stopped.

How long did the WannaCry attack last?

Screenshot of the ransom note left on an infected system Date 12 May 2017 – 15 May 2017 (initial outbreak) Duration

4 days
Location Worldwide

Why was WannaCry so successful?

WannaCry was so successful because

it leveraged an unpatched windows vulnerability

. NotPetya did the same.

Was WannaCry a worm?

WannaCry ransomware is

a crypto ransomware worm

that attacks Windows PCs. It’s a form of malware that can spread from PC to PC across networks (hence the “worm” component) and then once on a computer it can encrypt critical files (the “crypto” part). The perpetrators then demand ransom payments to unlock those files.

Can WannaCry be decrypted?

Good news for many victims of WannaCry:

Free tools can be used to decrypt some PCs that were forcibly encrypted by the ransomware

, providing the prime numbers used to build the crypto keys remain in Windows memory and have not yet been overwritten.

How much did WannaCry cost the NHS?

The financial cost of WannaCry attacks was

less than £6 million

. However, researchers at Imperial College’s Institute of Global Health Innovation believe that the WannaCry attacks cost NHS organisations no more than £5.9 million in lost admissions and appointments, including £4 million in lost inpatient admissions.

How quickly did WannaCry spread?

WannaCry spread like wildfire, encrypting hundreds of thousands of computers in more than 150 countries

in a matter of hours


Is EternalBlue a WannaCry?

For example, WannaCry, a crypto-ransomware, was one of the first and most well-known malware to use this exploit to spread. WannaCry uses

the EternalBlue exploit

to spread itself across the network infecting all devices connected and dropping the cryptro-ransomware payload.

How much did the WannaCry hackers make?

In total, the hackers made

about $140,000 in bitcoin

from the operation, which on May 12 forced emergency rooms in the U.K. to turn away patients, and shut down a Spanish telecommunications company and a Russian cellphone operator.

Did WannaCry steal data?

The type that locks you out of your computer is called locker ransomware. Like other types of crypto-ransomware, WannaCry

takes your data hostage

, promising to return it if you pay a ransom. WannaCry targets computers using Microsoft Windows as an operating system.

Who stopped WannaCry virus?

When he was just 22,

Marcus Hutchins

rose to fame by single-handedly stopping the spread of WannaCry, a ransomware attack that hit hundreds of thousands of computers worldwide and effectively shut down over a dozen UK hospitals.

Diane Mitchell
Diane Mitchell
Diane Mitchell is an animal lover and trainer with over 15 years of experience working with a variety of animals, including dogs, cats, birds, and horses. She has worked with leading animal welfare organizations. Diane is passionate about promoting responsible pet ownership and educating pet owners on the best practices for training and caring for their furry friends.