Cybersecurity agencies across the US and UK are blaming North Korea for the ransomware attack which hit the NHS this time last month.

A report by the US National Security Agency, which developed the software exploit used to attack Microsoft operating systems, are pointing their fingers at  North Korea for the attack.

The UK investigation is understood to been considerably more in-depth than the US effort because of the overall effect that the attack had on the NHS, and because the US was not as badly affected.

Private sector researchers had already managed to reverse-engineer the software and find similarities between it and other malicious code developed by North Korea.

It is understood that the work completed by NCSC (National Cyber Security Centre) was based on a wider range of sources, possibly including intelligence collected by GCHQ (Government Communications Headquarters)


The link to North Korea has not been officially confirmed by the Government due to intelligence issues.

Evidence that North Korea was responsible for the WannaCry ransomware has been mounting from the private sector's cybersecurity industry.

Security company Symantec said its researchers found similarities in the code and attack infrastructure between the malicious software used in the WannaCry ransomware attacks and other attacks attributed to North Korea.

The attack, which led to the sudden closure of several accident and emergency departments in the NHS, exposed serious vulnerabilities in the way that the service approached computer security.

Some researchers had urged caution regarding the attribution of the attack to North Korea.

It has been warned that the repetition of code and attack infrastructure from other operations believed to have been conducted by the state could have been meant to mislead investigators.


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