Cisco Secure Firewall Threat Defense Virtual is the virtualized version of Cisco's Secure Threat Defense firewall.

Advanced Security
Advanced threat defense options include next generation IPS, advanced malware protection, URL filtering, and application visibility and control. Scales up/down and high availability provides resilience. Cisco Talos delivers industry-leading visibility to detect and stop advanced threats.

Consistent Security Everywhere
Gain consistent policies, enforcement, and threat protection across environments. Inspect encrypted traffic, while automated risk ranking and impact flags reduce event volume to prioritize threats. Micro-segmentation protects east-west traffic.

Unified Management
Unified management for physical and virtual devices with Cisco Defense Orchestrator (CDO). Can be managed by APIs, Firewall Device Manager, Cisco Defense Orchestrator, or Firewall Management Center (FMC). FMC may reside on-premise or on cloud. Supports REST API, an HTTP-based interface for management, policies, and monitoring.

For supported instance types, please refer the datasheet.

More solution info:
Cisco virtual firewalls for public cloud
Cisco Secure Firewall Threat Defense Virtual Data Sheet
Cisco Secure Firewall Threat Defense Virtual Getting Started Guide