Malicious code used to press-gang IoT connected devices into a botnet was leaked online over the weekend.

The Mirai malware is a DDoS Trojan and targets Linux systems and, in particular, IoT devices. A botnet formed using the malware was used to blast junk traffic at the website of security researcher Brian Krebs last month in one of the largest such attacks ever recorded.

The powerful zombie network that spawned a 620Gbps DDoS was created by relying on factory default or hard-coded usernames and passwords to compromise embedded devices. The availability of the Mirai source code makes it much easier for other hackers to take advantage of insecure routers, IP cameras, digital video recorders and other IoT devices to launch similar attacks.

Source: Source code unleashed for junk-blasting Internet of Things botnet | The Register