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Medium

Swedish IT supplier Miljödata data breach affects 1.5M people

Swedish IT supplier Miljödata suffered a cyberattack by the Datacarry ransomware group, exposing personal data of about 1.5 million Swedes, including names, addresses, ID numbers, and sensitive health/employee…

Key points

  • Datacarry ransomware group responsible.
  • Exposed personal data of approximately 1.5 million Swedes.
  • Data included names, addresses, ID numbers, and sensitive health/employee information.

Connected intelligence

Signal brief

Follow the organization, likely method and potential impact to explore connected Shadow Tier intelligence.

02

Likely method

Ransomware

Malware activity

03

Potential impact

Potential operational disruption

Confidentiality, Availability

Published
Nov 4, 2025
Updated
Jun 25, 2026
Confidence
Medium
Evidence
1 source

Structured assessment

Signal analysis

This analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.

Threat source

Malware activity

The feed marks multiple actor roles. Treat this as a review signal rather than a final attribution.

  • Source type: possible insider or internal misuse
  • Source type: supplier or third-party involvement

Business impact

Potential operational disruption
Impact area
Confidentiality, Availability
Likely asset
User or customer data

Mentioned entities

MiljodataData DisclosureSwedish ITMiljDatacarrySwedesThe Swedish DPAExposed

Quick context

Questions about this signal

What happened in this signal?

Swedish IT supplier Miljödata suffered a cyberattack by the Datacarry ransomware group, exposing personal data of about 1.5 million Swedes, including names, addresses, ID numbers, and sensitive health/employee information, which was later published to the darknet. The Swedish DPA launched an investigation.

When was this signal reported?

Shadow Tier lists Nov 4, 2025 as the signal date.

Which organization is connected to this signal?

Miljodata is the organization connected to this public signal.

Explore Miljodata
Which attack pattern is relevant?

This signal is connected to current ransomware incidents based on its reported incident context.

Explore current ransomware incidents