Disruptive Ransomware Attack hit Presto Home Appliance Manufacturer

National Presto Industries Inc disclosed a material cybersecurity incident that occurred on March 1, 2025. The company reported the system outage in a filing with the Securities and Exchange Commission. The attack interrupted shipping and manufacturing processes causing delivery delays. The company has instituted temporary measures to uphold critical operations. Presto began mailing data breach notification letters to impacted individuals on April 25. Ramifications of the incident on National Presto’s financial health and operational performance could be materially significant.

InterLock ransomware gang added National Presto Industries’ subsidiary National Defense Corporation to its Tor-based leak site. The hacker group says it stole vast amounts of data from the company, including roughly 450,000 folders containing close to 3 million files. National Presto Industries has made no public statement regarding the group’s claims.

Estimated Cost

shipping and receiving, manufacturing processes, back office functions impacted

Threat Source

Impacts

OT IT