Ransomware attacks are increasingly exploiting network vulnerabilities before launching full-scale encryption. This white paper from Arista outlines how early warning signs—such as phishing, unusual RDP access, privilege escalations, lateral movement, or ICMP tunnels—can be detected through disciplined network threat hunting. Using the MITRE ATT\&CK framework, Arista categorizes tactics and techniques for each attack phase and offers detection strategies, from identifying PsExec activity to monitoring SMB file transfers and WinRM connections. The key message: network-based signals often precede data exfiltration, offering a crucial window to detect and disrupt attacks.

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