US EditionMicrosoft Says Nearly 400,000 Windows Computers Infected By Lumma Malware
- On May 21, 2025, Microsoft revealed that Lumma Stealer had compromised more than 394,000 Windows devices worldwide during the period from mid-March to mid-May.
- This outbreak followed Lumma's rise as a Russian malware-as-a-service tool sold on underground forums to steal data via phishing and impersonation campaigns.
- Authorities including Microsoft, the DOJ, Europol, and tech firms seized about 2,300 domains and disrupted Lumma's infrastructure, cutting off communication between operators and victims.
- FBI Deputy Assistant Director Brett Leatherman described Lumma as the most widespread information-stealing malware, responsible for approximately 10 million infections and resulting in credit card fraud losses amounting to $36.5 million in 2023 alone.
- Despite the disruption, experts warn Lumma operators might regroup, so coordinated efforts will continue to limit the malware’s reach and protect affected sectors worldwide.
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Europol and Microsoft Make Larger Networks of Informationstelaler Lumma
The European Centre for Civil Crime of Europol and Microsoft deplores Lumma Stealer – the world's greatest threat to information stealer. Thousands of computers around the world were affected by this malware....
Microsoft, Europol and the US Attack the Infrastructure of a Virus Widely Used in Data Theft
Microsoft and Europol announced on Wednesday that they have worked together, with the participation of the US government, to neutralize the infrastructure that allowed the spread of a virus of Russian origin and the sale of information obtained through it. Known as Lumma Stealer or simply Lumma, the virus is "the preferred malware used to steal data by hundreds of actors that pose a threat to cybersecurity", Microsoft summed up in a statement. T…
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