APT41 Cyber Attacks: History, Operations, and Full TTP Analysis

APT41 is a long-running, highly capable threat actor conducting simultaneous espionage and financially motivated operations since at least 2007; the report catalogs their major campaigns, rapid weaponization of critical vulnerabilities (notably Log4Shell, Citrix ADC, and Zoho ManageEngine), use of living-off-the-land techniques, credential harvesting (Mimikatz, ntdsutil), web shells and service-based persistence, Cobalt Strike deployments, and exfiltration to legitimate cloud services like OneDrive, and recommends validating defenses via the Picus platform.