Хабр Курсы для всех
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Практикум, Хекслет, SkyPro, авторские курсы — собрали всех и попросили скидки. Осталось выбрать!
пароль(root:root) по протоколу telnet
The first one is a telnet scanner which tries a few different login combinations, e.g. root:root, admin:admin and both without passwords.
We used a strict set of rules to identify the target devices' CPU and RAM to ensure our binary was only deployed to systems where it was known to work. We also excluded all smaller groups of devices since we did not want to interfere with industrial controls or mission critical hardware in any way. Our binary ran on approximately 420 thousand devices. These are only about 25 percent of all unprotected devices found. There are hundreds of thousands of devices that do not have a real shell so we could not upload or run a binary, a hundred thousand mips4kce machines that are mostly too small and not capable enough for our purposes as well as many unidentifiable configuration interfaces for random hardware. We were able to use ifconfig to get the MAC address on most devices. We collected these MAC addresses for some time and identified about 1.2 million unique unprotected devices. This number does not include devices that do not have ifconfig.
The binary on the router was written in plain C. It was compiled for 9 different architectures using the OpenWRT Buildroot. In its latest and largest version this binary was between 46 and 60 kb in size depending on the target architecture.

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