A cyberattack on Deloitte UK was claimed by the ransomware group BrainCipher, which alleges stealing over 1TB of sensitive data.
Discovered on BrainCipher's data leak site, the group has set a countdown of ten days and twenty hours before releasing the data. They criticized Deloitte's security practices and promised to reveal the tools used during the breach.
BrainCipher, known for high-profile attacks like Indonesia's National Data Centre, spreads malware via compromised Windows domain admin credentials. Deloitte has not yet commented, and the claims remain unverified. The incident underscores the ongoing risks of ransomware to major corporations.