Passaic County, NJ Hit by Medusa Ransomware, Data Stolen
The Medusa ransomware group claimed responsibility on March 17, 2026, for a cyberattack on Passaic County, New Jersey.
Key points
- Medusa ransomware group claimed responsibility for the attack.
- IT systems and phone lines were disrupted, affecting nearly 600,000 residents.
- Ransom demand of $800,000 was made.
Connected intelligence
Signal brief
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Organization
- Published
- Mar 17, 2026
- Updated
- Jun 25, 2026
- Confidence
- Medium
- Evidence
- 3 sources
Structured assessment
Signal analysis
It helps compare this signal with other published signals without treating the labels as final determinations.
Threat source
Watch ransomware, endpoint compromise and business interruption exposure.
Business impact
- Impact area
- Confidentiality, Availability
- Likely asset
- User or customer data
Mentioned entities
Quick context
Questions about this signal
What happened in this signal?
The Medusa ransomware group claimed responsibility on March 17, 2026, for a cyberattack on Passaic County, New Jersey. The attack, initially reported by the county on March 4, disrupted IT systems and phone lines, affecting nearly 600,000 residents. Medusa demanded an $800,000 ransom and posted images of purportedly stolen documents as proof.
When was this signal reported?
Shadow Tier lists Mar 17, 2026 as the signal date.
Which organization is connected to this signal?
Passaiccountynj is the organization connected to this public signal.
Explore PassaiccountynjWhich attack pattern is relevant?
This signal is connected to current ransomware incidents based on its reported incident context.
Explore current ransomware incidentsWhich impact area is relevant?
This signal is connected to data exposure and breach intelligence based on its reported consequences.
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Japan’s Nikkei has confirmed a major data breach that potentially exposed the personal information of more than 17,000 employees and business partners after hackers infiltrated its internal Slack messaging platform. Australian privacy commissioner warns that the human factor is a growing threat as notifications caused by staff mistakes rose significantly even as total breaches declined 10% from a record high. Philippine bank BDO is shoring up its cyber security capabilities to protect its data and systems as it moves more services to the cloud and expands its physical presence into remote areas of the archipelago. The agency is working with IBM, the Government Technology Agency and the Cyber Security Agency of Singapore (CSA) to establish the full facts and ensure remedial measures are taken. It has also lodged a police report and notified the Personal Data Protection Commission, and urged the public to remain vigilant against phishing emails, websites, text messages and phone calls from parties claiming to represent government agencies or other organisations. “We apologise for the concern and inconvenience this incident may cause,” the SLA said. The incident underscores the long-standing risk of real personal data finding its way into development and test environments , which are typically less closely guarded than production systems – a risk that is compounded when those environments are operated by third parties. It is also the latest in a series of supply chain security incidents in Singapore in recent years. In April 2025, Toppan Next Tech, a printing supplier for DBS Bank and the Singapore branch of Bank of China, was hit by a ransomware attack that saw customer data stolen by the threat actor . Some 8,200 DBS customers – mostly holders of DBS Vickers trading accounts and Cashline loans – and around 3,000 Bank of China customers were potentially affected. A year earlier, in August 2024, a hacker who gained unauthorised access to Mobile Guardian , a mobile device management platform then deployed across Singapore’s schools, remotely wiped the iPads and Chromebooks of about 13,000 students from 26 secondary schools. The Ministry of Education subsequently removed the software from all student devices and terminated its contract with the supplier.
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