SynkLoader Malware Distributed via Teams Phishing

SynkLoader is a sophisticated, modular malware framework identified in late July 2026, primarily targeting enterprise environments through social engineering on Microsoft Teams. Attackers impersonate IT help desk personnel to convince victims to download a malicious MSI installer masquerading as a 'PowerShell Cleaner.' The malware is notable for its 'everything but the kitchen sink' approach, bridging multiple programming languages including Python, PowerShell, C#, and C++ to evade detection.

The attack chain involves a multi-stage loading process that executes entirely in memory. Key capabilities include system profiling to assess Active Directory size, credential theft via a fake Windows lock screen ('PhishLocker'), and network pivoting through custom backconnect proxies and VNC-like desktop streaming. These features, combined with hands-on-keyboard activity, suggest SynkLoader is likely used by ransomware operators or initial access brokers to compromise and evaluate high-value targets.