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Deep Dive – Ireland’s HSE Ransomware Attack

Your cybersecurity experts

Lieuwe Jan Koning

Co-Founder and CTO ON2IT Group

Luca Cipriano

Threat Intel Specialist ON2IT

Rob Maas Field CTO

Rob Maas


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Ireland’s HSE Ransomware Attack

Health Service Executive (HSE) fell victim to a significant ransomware attack. This is huge, because they are part of the largest healthcare network in Ireland, with about 4,000 locations, 54 hospitals, and 70,000 devices affected. The consequences were incalculable.

The impact could have been much less if basic security controls were in place. What exactly went wrong? How did the attackers manage to infiltrate such a large network? What steps could have been taken to prevent this disaster, and what lessons can other organizations learn from this incident?

Our experts Luca Cipriano and Rob Maasbreak down the timeline, the techniques used by the attackers, and the critical security measures that were missing.

Download the infographic for the complete overview

Episode details:

The Health Service Executive (HSE) in Ireland, a major healthcare network, experienced a severe ransomware attack, disrupting services across numerous locations and hospitals.

In this Threat Talks Deep Dive, we show how basic security lapses allowed attackers to penetrate the network, causing significant operational challenges during the COVID-19 pandemic.


Cybersecurity experts Lieuwe Jan Koning, Luca Cipriano and Rob Maas provide a thorough analysis of:

– the attack’s progression

– the tactics employed by the cybercriminals

– the essential security practices that were missing.


Learn about the critical importance of network segmentation, the risks posed by outdated systems, and effective strategies to mitigate ransomware threats.

Are your defenses prepared to handle a similar cyberattack? Tune in to find out!

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