https://github.com/justinazoff/ssh-auth-logger

A low/zero interaction ssh authentication logging honeypot
https://github.com/justinazoff/ssh-auth-logger

honeynet ssh-server

Last synced: 2 months ago
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A low/zero interaction ssh authentication logging honeypot

• Host: GitHub
• URL: https://github.com/justinazoff/ssh-auth-logger
• Owner: JustinAzoff
• Created: 2017-04-14T00:22:50.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2024-08-06T18:25:58.000Z (6 months ago)
• Last Synced: 2024-08-06T22:09:01.576Z (6 months ago)
• Topics: honeynet, ssh-server
• Language: Go
• Homepage:
• Size: 19.5 KB
• Stars: 18
• Watchers: 5
• Forks: 8
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
A low/zero interaction ssh authentication logging honeypot

## Interesting features

### Structured logging

ssh-auth-logger logs all authentication attempts as json making it easy to

consume in other tools.  No more ugly [openssh log parsing

vulnerabilities](http://dcid.me/texts/attacking-log-analysis-tools.html).

### "Random" host keys

ssh-auth-logger uses HMAC to hash the destination IP address and a key in order to

generate a consistently "random" key for every responding IP address.  This

means you can run ssh-auth-logger on a /16 and every ip address will appear

with a different host key.  TODO: add random sshd version reporting as well.

## Example log entry

This is normally logged on one line

```

{

  "client_version": "SSH-2.0-libssh2_1.4.3",

  "destinationServicename": "sshd",

  "dpt": "22",

  "dst": "192.168.1.2",

  "duser": "root",

  "level": "info",

  "msg": "Request with password",

  "password": "P@ssword1",

  "product": "ssh-auth-logger",

  "server_version": "SSH-2.0-OpenSSH_5.3",

  "spt": "38624",

  "src": "192.168.1.4",

  "time": "2017-11-17T19:16:37-05:00"

}

```

## How to use it

    go install github.com/JustinAzoff/ssh-auth-logger@latest

    export SSHD_BIND=:2222

    ~/go/bin/ssh-auth-logger

## Note

To bind to port 22 directly:

    sudo setcap cap_net_bind_service=+ep ~/go/bin/ssh-auth-logger

## Run with docker

    docker run -t -i --rm  -p 2222:22 justinazoff/ssh-auth-logger