Ransomware Attacks Disrupt Hospitals From Los Angeles to Romania and the NHS
Ransomware attacks have repeatedly crippled hospital operations, forcing providers to divert care, lose access to critical systems, and in some cases pay attackers to recover. At Hollywood Presbyterian Medical Center in Los Angeles, malware encrypted files and disrupted the hospital's computer network, prompting executives to pay about $17,000 in bitcoin after attackers reportedly reduced an initial demand of $3.4 million. The outage interfered with administrative functions and highlighted how cyberattacks on healthcare can create direct patient-safety risks.
The threat later scaled across national healthcare systems. The WannaCry outbreak spread to nearly 100 countries and severely impacted the UK's NHS, knocking hospitals and clinics offline and disrupting appointments and treatment. In Romania, a ransomware attack on a healthcare IT platform left multiple hospitals offline, underscoring how attacks on shared digital infrastructure can cascade across many facilities at once and paralyze care delivery well beyond a single organization.

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How this story unfolded
5 events from the most recent confirmed update back to the earliest known activity.
Ransomware attack knocks Romanian hospitals offline
Hospitals across Romania were taken offline following a ransomware attack on an IT platform used in the healthcare sector.
WannaCry ransomware outbreak hits organizations in nearly 100 countries
A massive global ransomware campaign spread across nearly 100 countries, including major disruption to the UK's NHS and other organizations worldwide.
Locky ransomware campaign targets hospitals
A large Locky ransomware campaign was reported as targeting hospitals, marking a broader wave of healthcare-focused ransomware activity months after the Hollywood Presbyterian incident. The campaign represented a distinct threat development affecting the healthcare sector.
Hollywood Presbyterian restores systems after paying ransom
The hospital paid about $17,000 in bitcoin to the attackers after an initially much higher demand was reported, and full service was restored. CEO Allen Stefanek said paying was the quickest way to regain access to encrypted files and resume administrative functions.
Hollywood Presbyterian detects ransomware attack
Hollywood Presbyterian Medical Center in Los Angeles began experiencing computer problems from a ransomware attack that disabled its network and disrupted hospital operations.
Sources
3 references tracked. Mallory keeps watching after this page renders.
'Massive' Locky ransomware campaign targets hospitals | ZDNET
zdnet.com
Open sourceRansomware attacks on Hospitals put Patients at Risk
thehackernews.com
Open sourceL.A. hospital CEO says he paid $17K ransom to hackers
usatoday.com
Open sourceSee the full picture, correlated to your attack surface.
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