What happened?
The attack began when a malicious file was unintentionally downloaded onto an employee device on 22 March 2023. Despite a high priority security alert being raised within 10 minutes of the breach and some immediate automated action being taken, Capita did not quarantine the device for 58 hours, during which the attacker was able to exploit its systems.
This file enabled the deployment of malicious software onto the Capita network, allowing the hacker to stay in the system, gain administrator permissions and access other areas of the network. Between 29 and 30 March 2023, nearly one terabyte of data was exfiltrated. On 31 March 2023, ransomware was deployed onto Capita systems and the hacker reset all user passwords, preventing Capita staff from accessing their systems and network. We received at least 93 complaints in relation to this attack.
|