Lumma Stealer operation hit 400,000 computers worldwide before coordinated takedown shut down Russian cybercrime kingpin.

Earlier this month, a coordinated disruption action targeting the Lumma malware-as-a-service (MaaS) information stealer operation seized thousands of domains, part of its infrastructure backbone worldwide.

Microsoft has teamed up with law enforcement agencies across the globe to disrupt the infrastructure behind one of the world’s most notorious infostealer operations. Microsoft said that, between March 16 and May 16, it identified over 394,000 Windows computers globally that were infected with Lumma Stealer malware.

Microsoft said Wednesday that it broke down the Lumma Stealer malware project with the help of law enforcement officials across the globe.

A global cybercrime tool used to steal passwords and drain bank accounts was shut down in a major takedown led by Microsoft and federal authorities.The tool called Lumma Stealer had infected more than 394,