Botnet
A network of infected machines an attacker controls remotely to send spam, launch denial-of-service attacks or distribute malware.
Full definition
A botnet is a network of infected devices, computers, servers, routers, cameras, that an attacker controls remotely without their owners knowing. Each recruited machine, called a bot or zombie, executes orders received from the operator's command and control infrastructure.
Botnets are the heavy machinery of cybercrime: they send massive phishing and spam campaigns, launch distributed denial-of-service (DDoS) attacks, run credential stuffing at scale and distribute other malware. Operators also rent that capacity to third parties as a service.
For a company the risk is double: being targeted by a botnet, or being part of one, contributing machines that attack others and burn the network's reputation. Patching, changing default passwords and monitoring outbound traffic reduce both fronts.
Related terms
Malware
Any software designed to damage, spy on or take control of a system without authorization. It almost always needs a person to let it in.
Credential stuffing
Automated testing of credentials stolen from one service against many others. It works because people reuse passwords.
Threat actor
Any person or group with the intent and capability to attack: organized crime, state groups, hacktivists or insiders. Knowing them orders your defense.
From definition to data: measure your company's human risk
Fensivo detects leaked credentials, simulates real attacks and validates with retests that behavior changed.