Halliburton, one of the world’s largest energy companies, has confirmed a cyberattack that led to hackers accessing and stealing company data. The company took some systems offline and is now investigating the scope of the breach and its impact on operations. While Halliburton hasn’t confirmed details, a ransomware group called RansomHub is believed to be behind the attack, claiming to have encrypted and exfiltrated files. As of now, Halliburton has not appeared on the gang’s leak site, which is often used to pressure victims into paying. The company has not disclosed what data was stolen or who is leading its cybersecurity response.