Chelan County Government Systems Compromised by Malware Attack

Mynorthwest

Chelan County Government Systems Compromised by Malware Attack

First seen 25 May 2026, 17:02 UTC • •51.9

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ThreatCluster •May 26, 2026 at 16:41 UTC

•Chelan County's government networks were shut down following a malware attack.
•The malware was detected on May 24, 2026, affecting all departments.
•Emergency services continue to operate, but system recovery timelines are unclear.

Chelan County, Washington, experienced a malware attack that affected all government departments, prompting officials to shut down networks, computers, and phone systems. The malware was detected by the IT department at 10 a.m. on May 24, 2026. The county's Emergency Management confirmed that the attack impacted all departments and stated that the full extent of the damage is still unknown. The IT team is collaborating with security partners to restore systems, but no timeline for recovery has been established. Emergency services remain operational, and residents are advised to contact Rivercom 911 for urgent assistance. Updates are expected on May 26, 2026, due to the holiday weekend.

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Timeline

2026-05-24

Malware detected in Chelan County systems

Chelan County IT detected malware at 10 a.m., leading to a shutdown of all networks and phone systems.

2026-05-24

County officials announce system shutdown

Chelan County Emergency Management confirmed the shutdown of networks and systems across all departments as a precaution.

2026-05-25

Public notified of ongoing issues

Residents were informed about the malware attack and advised to use Rivercom 911 for emergencies.

More articles in this cluster (3)

Threat Graph

3 entities, 2 inferred relationships (STIX 2.1).

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Technique (1)

Malware

Organization (2)

Chelan County
Chelan County Sheriff's Office

Relationships

Malware related to Chelan County
Malware related to Chelan County Sheriff's Office

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