#3
BleepingComputer
general
June 05, 2026 at 18:09 UTC
Chinese APT deploys new malware to keep access to hacked networks
By Bill Toulas
AI Summary
Chinese espionage group UNC5221 has been deploying two newly documented malware families — Plenet and AgentPSD — alongside the previously known Brickstorm backdoor to maintain persistent access to Microsoft 365 environments. This represents a significant evolution in UNC5221's post-compromise toolkit targeting M365 tenants.
Relevance score: 84.0/100
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