Added B4nner Challenge

B4nner/Dockerfile

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+FROM ubuntu:22.04
+
+RUN apt-get update && \
+    apt-get install -y openssh-server less && \
+    rm -r /var/lib/apt/lists/*
+
+RUN useradd -m -d /challenge tawat
+COPY challenge/ /challenge
+RUN chown -R root:tawat /challenge && \
+    mv /challenge/shell /usr/bin/ && \ 
+    chsh -s /usr/bin/shell tawat && \
+    echo 'tawat:ctf' | chpasswd && \
+    rm -r /etc/update-motd.d/ && \
+    ln -s /dev/null .bash_history
+
+WORKDIR /challenge
+
+EXPOSE 22
+
+ENTRYPOINT service ssh start && tail -f /dev/null

B4nner/README.md

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+# B4nner
+
+- **`Author:`** [SlyPex](https://github.com/SlyPex)
+- **`CTF:`** [HackINI2K23](https://github.com/Shellmates/HackINI-2k23-public)
+- **`Categorie:`** Linux
+- **`Difficulty:`** Easy
+
+## Description
+
+> I made a cool banner for the CTF, What do you think ?  
+
+
+- **Connect with** `ssh tawat@localhost -p 1337`
+- **password** `ctf`
+
+
+
+## Solution
+Solution of the challenge can be found [here](solution/).

B4nner/challenge.yml

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+author: SlyPex
+author_link: https://github.com/SlyPex
+category: misc
+connection_info: ssh [email protected] -o ProxyCommand="openssl s_client
+  -quiet -connect b4nner.ctf.shellmates.club:443 -servername b4nner.ctf.shellmates.club"
+deployment:
+  autoban: false
+  conn_type: ssh
+  containerPort: 22
+  deployed: true
+  isolate: false
+  name: b4nner
+  nodePort: 30201
+  type: tcp
+description: "> I made a cool banner for the CTF, What do you think ?  \n\n**Password:**\
+  \ ctf  \n **Author**: SlyPex"
+difficulty: easy
+extra:
+  decay: 15
+  initial: 500
+  minimum: 50
+flags:
+- shellmates{y0U_D0_KNOw_7hE_LEs$_C0MmAND}
+name: B4nner
+state: visible
+tags:
+- Linux
+- Jail
+- RTFM
+type: dynamic
+value: 500
+version: '0.1'
+wave: 1

B4nner/challenge/banner

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+
+
+ ##     ##     ###      ######   ##    ##       ####  ##    ##  ####           #######   ##    ##   #######    #######
+ ##     ##    ## ##    ##    ##  ##   ##         ##   ###   ##   ##           ##     ##  ##   ##   ##     ##  ##     ##
+ ##     ##   ##   ##   ##        ##  ##          ##   ####  ##   ##                  ##  ##  ##           ##         ##
+ #########  ##     ##  ##        #####           ##   ## ## ##   ##            #######   #####      #######    #######
+ ##     ##  #########  ##        ##  ##          ##   ##  ####   ##           ##         ##  ##    ##                ##
+ ##     ##  ##     ##  ##    ##  ##   ##   ###   ##   ##   ###   ##           ##         ##   ##   ##         ##     ##
+ ##     ##  ##     ##   ######   ##    ##  ###  ####  ##    ##  ####  ####### #########  ##    ##  #########   #######
+
+

B4nner/challenge/flag.txt

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+shellmates{y0U_D0_KNOw_7hE_LEs$_C0MmAND}

B4nner/challenge/shell

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+#!/bin/sh
+
+exec less /challenge/banner
+exit 0

B4nner/docker-compose.yml

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+services:
+  b4nner:
+    container_name: misc_b4nner
+    build: .
+    image: b4nner_chall:latest
+    ports:
+      - '1337:22'
+    deploy:
+      replicas: 1
+      restart_policy:
+        condition: on-failure
+      resources:
+        limits:
+          cpus: '0.2'
+          memory: 50M

B4nner/solution/README.md

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+# B4nner
+
+## Write-up
+
+- Inside the `less` command you need to **examine** another file by typing `:e` and then the file name `flag.txt`.
+
+## Flag
+
+`shellmates{y0U_D0_KNOw_7hE_LEs$_C0MmAND}`