Emissary Keylogger

Emissary Keylogger is a Windows-based malware specimen often seen in security research, reverse-engineering labs, and threat-intelligence collections. It is typically studied to understand how basic keylogging malware attempts to capture input, persist on a system, and exfiltrate data using simple communication methods.
From a defensive standpoint, it serves as an example of legacy credential-stealing threats that help analysts, students, and blue-teamers recognize indicators of compromise, weak security practices, and common anti-analysis tricks used by low-to-mid tier malware families.

Tool Features

• Captures keyboard input to demonstrate credential-theft behavior patterns
• Shows basic persistence mechanisms used by Windows malware
• Illustrates simple data exfiltration concepts used in early keyloggers
• Commonly referenced in malware analysis tutorials and sandbox testing
• Useful for training antivirus detection, YARA rules, and incident response skills