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Circle II · Legions (botnets)

The Demon Mirai, Shepherd of Cameras

Legend

Mirai combs the Internet for cameras, routers and other connected things that answer on Telnet with factory passwords, and drafts them into an army for DDoS attacks. In 2016 it signed record attacks, including the one on Dyn on 21 October that darkened major websites for hours. Its source code was published in September 2016 and its three authors pleaded guilty in the US in December 2017, but the flock of variants still grazes.

Exorcism

Cast it out by changing the default credentials of every IoT device the moment it leaves the box. Disable Telnet and remote administration on exposed devices, put connected gadgets on a separate network and keep their firmware updated.

Technical record

Circle
Circle II · Legions (botnets)
First seen
2016
Status
Active
Works
The Scourge of Mirai

IoT botnet malware that scans for devices such as cameras and routers using factory-default Telnet credentials and enlists them for DDoS attacks. In 2016 it produced record attacks, including the Dyn DNS outage that disrupted major websites. Its source code was published in September 2016 and its three authors pleaded guilty in the US in December 2017; countless variants remain active.

Sources: justice.gov · en.wikipedia.org · cisa.gov

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