Microsoft announced the successful takedown of the Lumma Stealer malware, which infected over 394,000 Windows computers globally. The operation involved collaboration with law enforcement, including the U.S. Department of Justice and Europol, to disrupt the malware's infrastructure and seize domains used by cybercriminals. Lumma Stealer has been a favored tool for hackers, enabling them to steal sensitive information such as passwords, credit card details, and cryptocurrency wallets. The initiative highlights the ongoing battle against cybercrime and the importance of industry collaboration in enhancing cybersecurity.