May 21 (UPI) -- Microsoft, the Department of Justice and others have thwarted the use of the Lumma Stealer malware that globally has infected nearly 400,000 computers. The tech giant's Digital ...

A global law enforcement operation supported by Microsoft Corp. today disrupted the infrastructure behind Lumma, a prominent malware-as-a-service tool responsible for widespread information theft.

Microsoft (NASDAQ: MSFT) said on Wednesday that its Digital Crimes Unit filed a legal action on May 13 against Lumma Stealer, an information-stealing malware used by hundreds of cyber threat actors.

The Lumma malware was a favorite hacking tool used by bad actors, Microsoft said in the post. Hackers used the malware to steal passwords, credit cards, bank accounts and cryptocurrency wallets.

This time, Microsoft reports that the Lumma info stealer created by the notorious Russian malware developer known as Shamel infected over 394,000 PCs between March 16 and May 16, 2025.

Microsoft (MSFT) shares are in focus after the tech behemoth said Lumma malware infected nearly 400,000 Windows computers globally between March 16 and May 16. Hackers use Lumma to steal passwords ...

Tech giant Microsoft says it has taken legal action against the information-stealing malware Lumma Stealer and has blocked thousands of websites related to the software. Microsoft said in a May 21 ...

Microsoft said it identified over 394,000 Windows computers were infected by the Lumma malware March 16-May 16.

Between March and May, Microsoft identified more than 394,000 Windows computers across the world that had been infected by Lumma malware. At least 532 computers were infected in Georgia, according ...

The Lumma malware was a favorite hacking tool used by bad actors, Microsoft said in the post. Hackers used the malware to steal passwords, credit cards, bank accounts and cryptocurrency wallets.

Microsoft has taken legal and technical action to disrupt Lumma Stealer, a notorious malware operation responsible for widespread information theft, including from crypto wallets.