CSIDB logo
Incident

Newhall School District

Incident posture

Attack window
Sep 2020
Location
United States of America
Status
Historical
CIA posture
Available to members
Updated
2025-10-28 00:00

Linked entities

Victim
Newhall School District
Threat actors
0 actors
Sources
1 source

Timeline

Occurred
Sep 2020
Discovered
Pending
Disclosed
Pending
Resolved
Pending

Summary

A ransomware attack disrupted the Newhall School District's network, forcing cancellation of online classes for two consecutive days. The incident disabled critical systems, including email services, while educators provided non-technological lesson plans. District administrators engaged legal and insurance teams to investigate and resolve the breach, mirroring a similar cybersecurity incident affecting another local school system weeks prior.

Motives

Detailed motive labels are available to members.

2 motives

TTPs

Detailed technique labels are available to members.

1 technique

Description

The Newhall School District experienced a disruptive ransomware attack over the weekend of September 12-13, 2020, forcing the cancellation of all online classes on Monday, September 14. District officials announced via Instagram early Monday that the attack had disabled their network infrastructure, making virtual instruction impossible. By Monday evening, the district confirmed classes would remain canceled on Tuesday, September 15, as technical issues persisted. Superintendent Jeff Pelzel notified parents through a formal letter explaining the ongoing network outages and the inability to restore systems within the first 48 hours. The attack compromised critical IT resources, including the district's email server, severing primary communication channels between staff and families.

Response efforts involved coordinated actions with the district's legal counsel and insurance provider to investigate the breach and negotiate recovery options. Pelzel emphasized restoration priorities while directing teachers to develop non-digital lesson plans to maintain educational continuity without network dependencies. The incident mirrored cybersecurity challenges faced by other Southern California districts, including Rialto Unified School District's malware-related shutdown in August 2020. No ransom demands, payment details, or specific threat actor information were disclosed publicly. The district maintained operational focus on containing the attack's spread and minimizing academic disruption through alternative teaching methods during the three-day outage.

Sources

Sources available to members: 1 source.

CSIDB