A botnet of IoT (Internet of Things) devices created with the Linux/Moose malware is behind many bots that are plaguing social networks such as YouTube, Periscope, Twitter, and Instagram. Researchers say the botnet’s activity is related to social media fraud, an activity that describes the registration of fake accounts in order to boost the social media presence of other individuals. The malware infects devices by accessing random IPv4 addresses, attempting to brute-force their Telnet port. It installs an SOCKS4 proxy and relays traffic it receives from its control server.
Source: https://www.bleepingcomputer.com/news/security/a-botnet-of-iot-devices-is-behind-many-instagram-fake-profiles/