Trusted Tool, Hostile Hands: Atera RMM Foothold

A phishing-delivered intrusion that weaponized a legitimate remote-monitoring tool instead of custom malware. A finance analyst was lured by a grant-program email whose link pointed at a file-sharing platform; the download was an MSI that silently installed the Atera agent, registered the endpoint to an attacker-controlled tenant, persisted as a Windows service, and beaconed to Atera's cloud over HTTPS. From the vendor console the operator ran PowerShell discovery and staged a follow-on implant, all over trusted infrastructure. Reconstruct the chain from email, SIEM, and endpoint XDR telemetry and classify the key ATT&CK techniques.