Quasar

What it does

Quasar is a fast, lightweight .NET remote-administration tool for Windows offering remote desktop, file management, and more. It's used both for legitimate administration and red-team RAT scenarios.

Common use cases

• •Remote desktop and file management on Windows targets during post-exploitation.
• •Keylogging and screen capture for monitoring user activity on a compromised workstation.
• •Lightweight agent deployment that avoids triggering aggressive endpoint-protection heuristics.

Key features

• •Provides remote desktop, file manager, and shell terminal in a single C2 interface.
• •Built-in keylogger, screen capture, microphone recording, and webcam access.
• •Encrypted TCP communications with optional UPnP port mapping.
• •Small binary footprint with customizable client settings for evasion.

Source