The FBI and the Cybersecurity and Infrastructure Security Agency (CISA) have jointly released a cybersecurity advisory detailing the LummaC2 malware, an information-stealing tool used by cybercriminals to infiltrate victim networks and exfiltrate sensitive data. This malware targets critical infrastructure sectors across the United States and affects popular web browsers including Google Chrome, Mozilla Firefox, and Microsoft Edge. The advisory provides technical details and recommended mitigations to protect against this threat. The Lumma Stealer operation has been described as sprawling, with analyses breaking down its delivery techniques and capabilities.