Sinclair Broadcast said the cybersecurity incident has caused a disruption to parts of the business, including its local advertisements.
Photo: Win McNamee/Getty Images
Sinclair Broadcast Group Inc., SBGI -2.94% one of the largest owners of broadcast stations in the U.S., said it is working to contain a cybersecurity incident that disrupted some of its networks and had some of its servers and workstations encrypted with ransomware.
Sinclair said the event, which it identified over the weekend, has caused a disruption, and may continue to do so, to parts of the business, including its local advertisements.
The company said it has yet to determine whether the cyberattack will have a “material impact on its business, operations or financial results.”
Social-media posts from local network anchors and customers on Sunday and early Monday reported Sinclair-owned stations were down. Some Twitter posts noted the outage cut into broadcasts of National Football League games and morning news. Sinclair operates 185 broadcast networks in 86 markets and owns 21 regional sports networks.
In a statement on Monday, Sinclair said it was working with a cybersecurity firm and notified law enforcement and other government agencies.
The company said it was working “to restore operations quickly and securely.”
A spokesman didn’t comment on the magnitude of the breach or provide further comment beyond the statement.
Write to Lillian Rizzo at Lillian.Rizzo@wsj.com
Copyright ©2021 Dow Jones & Company, Inc. All Rights Reserved. 87990cbe856818d5eddac44c7b1cdeb8
Appeared in the October 19, 2021, print edition as ‘Sinclair Disrupted By Attack On Servers.’
