The FBI warns about compromised IoT devices – Help Net Security
Attackers use compromised routers, time clocks, audio/video streaming devices, Raspberry Pis, IP cameras, DVRs, NAS devices, satellite antenna equipment, smart garage door openers, and other devices that communicate with the Internet to send or receive data as proxies to send email, generate click-fraud activities, conduct credential stuffing attacks, obfuscate network traffic, and so on.
“Compromised devices may be difficult to detect but some potential indicators include: a major spike in monthly Internet usage; a larger than usual Internet bill; devices become slow or inoperable; unusual outgoing Domain Name Service queries and outgoing traffic; or home or business Internet connections running slow,” the Bureau shared in a public service announcement.