Malware-as-a-Service
Microsoft Teams voice calls abused to push Matanbuchus malware
The Matanbuchus malware loader has been seen being distributed through social engineering over Microsoft Teams calls impersonating IT helpdesk. Matanbuchus is a malware-as-a-service operation seen promoted on the dark web first in early 2021. It was advertised as a $2,500 Windows loader that executes malicious payloads directly in memory to evade detection. In June 2022, threat analyst Brad […]
DanaBot malware operators exposed via C2 bug added in 2022
A vulnerability in the DanaBot malware operation introduced in June 2022 update led to the identification, indictment, and dismantling of their operations in a recent law enforcement action. DanaBot is a malware-as-a-service (MaaS) platform active from 2018 through 2025, used for banking fraud, credential theft, remote access, and distributed denial of service (DDoS) attacks. Zscaler’s ThreatLabz researchers […]
Lumma infostealer malware operation disrupted, 2,300 domains seized
Earlier this month, a coordinated disruption action targeting the Lumma malware-as-a-service (MaaS) information stealer operation seized thousands of domains and part of its infrastructure backbone worldwide. This effort involved multiple tech companies and law enforcement authorities, resulting in Microsoft’s seizure of approximately 2,300 domains after legal action against the malware on May 13, 2025. At the […]
StealC malware enhanced with stealth upgrades and data theft tools
The creators of StealC, a widely-used information stealer and malware downloader, have released its second major version, bringing multiple stealth and data theft enhancements. The latest version of StealC was actually made available to cybercriminals in March 2025, but Zscaler researchers who analyzed it just published a detailed write-up. In the weeks that followed its release, several […]