Security Incident
UL Ransomware
UL LLC (commonly known as Underwriters Laboratories) suffered a ransomware attack that encrypted its server and caused the server to shut down the system when it recovered.
- Attack category
- Ransomware
Incident Overview
To prevent the attack from spreading further, the company shut down the system so that certain employees could not perform their work. According to sources familiar with the attack, UL decided not to pay the ransom, but to restore from backup.
Sources & References
This record presents information attributed to the linked sources. Incident dates describe the original event, not a new report. Reported loss figures reflect the source record and are not current market valuations.