Threatline

Attackers Tampered with AOMEI Backupper's Update Servers for Minutes to Deliver a Backdoor

Attackers repeatedly changed the files that AOMEI Backupper fetches from the vendor's own update servers, in windows of five to ten minutes at a time between May and July 2026, so that any copy of the Windows backup program that checked for an update during one of those windows would download and run a backdoor. Google Threat Intelligence Group, Mandiant, and ManageEngine's Threat Analysis