sshoo

a minimal, lightweight and secure ssh honeypot

sshoo is a ssh honeypot that does what it needs to do. Nothing fancy, just logs attacker's sessions into a file. That is all it does. No fake shell. Other SSH honeypots often write their own minimal implementations of sh. sshoo doesn't. It does one job, and does it well.

running

A Docker image of sshoo is provided to make it incredibly easy to run on your own hardware. Simply run:

bash
docker run -d \
 --name sshoo \
 -p 2222:2222 \
 -v $(pwd)/logs:/var/log/sshoo \
 ghcr.io/xorlaw/sshoo:latest

Or you could alternatively build from source.

configuring

There are really only 2 variables you would want to configure, and they can be configured via environment variables:

• SSHOO_ADDR : The address to listen on. Defaults to 2222.
• SSHOO_LOG : Path to sshoo's log file. Defaults to /var/log/sshoo/attempts.log.

log format

Very self explanatory. One JSON object per line. Example:

{
 "timestamp": "2024年01月15日T10:23:01Z",
 "remote_addr": "1.2.3.4:54321",
 "username": "admin",
 "password": "password123",
 "client_version": "SSH-2.0-OpenSSH_9.0"
}

You can inspect logs with jq:

bash cat logs/attempts.log | jq .

building from source

To build from source, build sshoo as you would build any other Golang project. Simply run:

git clone https://github.com/xorlaw/sshoo
cd sshoo
go mod tidy
go build -o sshoo ./src/

licensing

Licensed under The Unlicense.