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Incidents in sector:

Healthcare

Data breachContained

Yale New Haven Health data breach (2025)

Suspicious network activity at Yale New Haven Health led to the largest U.S. healthcare data breach of 2025: 5.5 million patients had names, contact details, dates of birth, medical record numbers, and Social Security numbers stolen. The health system later agreed to an $18 million class-action settlement.

Victim
Yale New Haven Health System
Loss
$18.0M
Records
5.6M
RansomwareContained

AIIMS Delhi ransomware

Ransomware encrypted the All India Institute of Medical Sciences in New Delhi — India's most prestigious public hospital — taking patient registration and clinical records offline for two weeks during peak winter patient load.

Victim
All India Institute of Medical Sciences (AIIMS) New Delhi
Loss
$15.0M
RansomwareContained

Hillel Yaffe Medical Center DeepBlueMagic ransomware (Israel, 2021)

DeepBlueMagic ransomware — attributed by Israeli officials to a Chinese criminal group — hit Hillel Yaffe Medical Center in Hadera, becoming the first known successful ransomware attack on an Israeli healthcare entity. Recovery extended for months. Israeli authorities subsequently reported a wave of follow-on attempts against nine more hospitals.

Victim
Hillel Yaffe Medical Center
RansomwareContained

HSE Ireland ransomware (Conti)

Conti ransomware paralysed Ireland's Health Service Executive, forcing cancellation of outpatient appointments nationwide for weeks. Conti released the decryptor for free; recovery still cost an estimated €100M+.

Victim
Health Service Executive (HSE) of Ireland
Loss
$130.0M
Records
700.0K
Data breachContained

Vastaamo psychotherapy data breach and patient extortion (Finland, 2020)

Records on approximately 33,000 patients of Finnish psychotherapy provider Vastaamo were stolen in 2018 from an unencrypted database with no root password. After failed company-extortion in October 2020, the attacker sent ransom demands to ~30,000 patients directly. Founder later acquitted; Aleksanteri Kivimäki convicted and sentenced to 6 years 3 months.

Victim
Vastaamo (Finnish psychotherapy centre)
Loss
$670.0K
Records
33.0K
EspionageContained

SingHealth data breach

Chinese state-attributed actors exfiltrated personal and outpatient medication records on 1.5 million SingHealth patients — including Prime Minister Lee Hsien Loong — in Singapore's most serious cyber incident.

Victim
Singapore Health Services (SingHealth)
Loss
$7.5M
Records
1.5M