Since Friday, the Mirai botnet has become kind of a household name. I have been continuing to watch the botnet infect my test DVR over and over. A couple of things I have seen over the weekend:
Prior articles about Mirai: ISC Briefing: Large DDoS Attack Against Dyn (with PPT slides for you to use) The Short Life of a Vulnerable DVR Connected to the Internet (includes full packet capture of an infection) The Internet of Evil Things: How to Detect and Secure Your Vulnerable Devices from the Mirai Botnet (Webcast) ------ |
Johannes 4473 Posts ISC Handler Oct 24th 2016 |
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Oct 24th 2016 5 years ago |
John Hardin 62 Posts |
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Oct 26th 2016 5 years ago |
I'm going to say the same thing I said on Krebs' blog: it looks like it's time to dust off LaBrea.
https://sourceforge.net/projects/labrea/ My telnet tarpit is catching a lot lately (less so the last few days). If this was done more widely then scanning for vulnerable IoT (and other) devices would be a lot more difficult and less attractive. |
John Hardin 62 Posts |
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Oct 26th 2016 5 years ago |
I have been thinking about Mirai botnet for a while. As per the information that I have assessed. It's caused using IOT devices such as DVR's, IP Cameras etc which have the default password for telnet tcp 23 or 2323.
So Mirai uses these IOT devices to attack using various denial of service attacks that I looked up on their source code page at git hub. But if I understand right most ISP's do not provide static IP Addresses. Without any type of NAT how would the hackers connect to the IOT devices? Even if Busybox was present on my IOT devices I can only connect to it from my internal network. Without NAT I wouldn't be able to connect to it from the external network at all. As per the Mirai Source code that I had a look at, the code includes a scanner to look for IOT devices and connect to it. Why cant we use the same scanner to detect these compromised devices and ensure remote connectivity is not possible by disabling NAT and providing some alternate solution. Am I on the right track or am I missing something from my assessment. |
John Hardin 2 Posts |
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Nov 5th 2016 5 years ago |
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