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Totp-Ssh-Fluxer - Take Security By Obscurity To The Next Level (This Is A Bad Idea, Don'T Really Use This Please)

https://1.bp.blogspot.com/-AKkC7r7JH88/YLc4c7ouPTI/AAAAAAAAXu8/xUUwB4NfrB4AxMzYryAxlY0lzRMw35hOgCNcBGAsYHQ/w640-h470/totp-ssh-fluxer_1.gif
Some people change their SSH port on their servers so that it is slightly harder to find for bots or other nasties, and while that is generally viewed as an action of security through obscurity it does work very well at killing a lot of the automated logins you always see in /var/log/auth.log

However what if we could go take this to a ridiculous level? What if we could use TOTP codes that are normally used as 2nd factor codes to login to websites to actually know what port the sshd server is listening on?

For this, I present totp-ssh-flux, a way to make sure your sshd port changes every 30 seconds, and possibly causing your adversaries a small period of frustration.
What you can see here is my phone (using a generic TOTP client) generating codes, that I can then use as the port to SSH into on a server.

The software behind it is fairly simple, It runs in a loop that does the following

* Generates a TOTP token
* Takes the last digit, if the result is above 65536, do that again
* Adds a iptables PREROUTING rule to redirect that number generated above
* Waits 30 seconds, removes that rule, repeat.

The neat thing is, because this is done in PREROUTING, even if the code expires, established connections stay connected.

Installation

You will most likely find more up to date instructions on the totp-ssh-flux project readme

Beware, currently I would not really recommend running this software, it was only written as a joke.

At the time of writing the project is just a single file, You will need to install golang and then go getand go build

Run the program as root ( it needs to, sorry, it's editing iptables )

Upon first run, the program will generate a token for the host in /etc/ssh-flux-key( you can use the -keypathoption to change that ) and you can input that into your phone or other clients.

You can confirm it works by running watch iptables -vL -t natand waiting for the iptables rules to be inserted and removed.
Want to see more insanity like this? Follow me on twitter @benjojo12
Download Totp-Ssh-Fluxer

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KitPloit - PenTest & Hacking Tools

Totp-Ssh-Fluxer - Take Security By Obscurity To The Next Level (This Is A Bad Idea, Don'T Really Use This Please)

3 viewsedited 22:34

As computer security auditors, what is your experience most similar to a hacker movie?
https://www.reddit.com/r/Pentesting/comments/nuq9c4/as_computer_security_auditors_what_is_your/

I'm dedicated to offensive security on websites, and once in a while I have found myself in almost comical situations where you can glimpse the occasional similarity to some exaggerated hacker movie. However other times things can get tense. Have you had an intense experience that you consider almost cinematic? submitted by /u/TimeTravel_07 (https://www.reddit.com/user/TimeTravel_07)
[link] (https://www.reddit.com/r/Pentesting/comments/nuq9c4/as_computer_security_auditors_what_is_your/) [comments] (https://www.reddit.com/r/Pentesting/comments/nuq9c4/as_computer_security_auditors_what_is_your/)

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As computer security auditors, what is your experience most...

I'm dedicated to offensive security on websites, and once in a while I have found myself in almost comical situations where you can glimpse the...

5 viewsedited 23:15

Hacking Articles Tips Tricks Videos Tutorials

7 views02:26

Hacking Articles Tips Tricks Videos Tutorials

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Dark Reading: Attacks/Breaches
First Known Malware Surfaces Targeting Windows Containers

Siloscape is designed to create a backdoor in Kubernetes clusters to run malicious containers.

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Dark Reading

First Known Malware Surfaces Targeting Windows Containers

Siloscape is designed to create a backdoor in Kubernetes clusters to run malicious containers.

9 viewsedited 02:26

Hacking Articles Tips Tricks Videos Tutorials

7 views02:33

Hacking Articles Tips Tricks Videos Tutorials

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Hacking on Medium
TryHackMe Walkthrough: Steel Mountain (with &without Metasploit)

https://cdn-images-1.medium.com/max/856/1*b_VRnFaXvplraQZFznKkCQ.png
This room is a box hosting two web services, and one of them is hosting a vulnerable service. We are able to use an exploit to achieve…

Continue reading on Medium »

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Medium

TryHackMe Walkthrough: Steel Mountain (with &without Metasploit)

This room is a box hosting two web services, and one of them is hosting a vulnerable service. We are able to use an exploit to achieve…