突然データが見られなくなった | 国民のためのサイバーセキュリティサイト

This page presents a ransomware attack case study. An employee discovered their company's internal system became inaccessible due to ransomware infection through a VPN device vulnerability. Ransomware is malicious software that locks systems or encrypts data, rendering them unusable while demanding ransom payments. It can also steal and threaten to publish data. The response involves immediately isolating infected devices from networks and reporting to police. Prevention measures include avoiding unsupported software, deploying security software, and maintaining proper data backups and recovery plans.