Russia-linked APT group Secret Blizzard is using Amadey Malware-as-a-Service to infect systems in Ukraine with the Kazuar backdoor.Secret Blizzard leveraged the Amadey bot malware to infiltrate devices used by the Ukrainian military.The group has a strategy of blending cybercrime with targeted cyber-espionage activities.Microsoft is investigating how Secret Blizzard gained control of other threat actors' access to deploy its own tools.