A lightweight Minecraft plugin that detects hack clients by exploiting the Sign Translation 'Vulnerability'.

⚠️ Important Notice

Compatibility: This plugin only works on versions 1.20.x and newer. Most modern hack clients have patched this vulnerability. DirtyDetect works best against older or less maintained clients.

📖 How It Works

When a player joins the server, Dirty Detect immediately sends them a sign change packet. Hack clients bind their internal actions (such as opening a mod menu, toggling features, etc.) to real keyboard keys (for example: Right Shift - opens the mod menu).

Because these keybinds are registered inside the client, the hack client automatically responds to the sign packet with its bound key (e.g. Right Shift). A vanilla Minecraft client would never send such a response unprompted.

Dirty Detect intercepts this response: if a real key is returned instead of nothing, the player is immediately flagged and the configured action is triggered.

Note: Most modern, actively maintained hack clients have patched this behavior. Dirty Detect is most effective against older or less frequently updated clients.

✨ Features

• 🔍 Automatic hack client detection via the Sign Translation 'Vulnerability'
• 📢 Configurable notifications - alert players with a specific permission node, or broadcast to all online players
• ⚙️ Configurable detection action - runs any command on the detected player
• 🏷️ Custom prefix for all plugin messages
• 🔧 Command customization - rename or alias plugin commands to your liking
• ♻️ Live reload - apply config changes without restarting the server

🛠️ Commands

Command	Description	Permission
/dirtydetect reload	Reloads the plugin configuration	dirtydetect.reload
/dirtydetect version	Displays the current plugin version	dirtydetect.version

🔐 Permissions

Permission	Description	Default
dirtydetect.reload	Allows use of the reload command	OP
dirtydetect.bypass	Exempts a player from being detected	OP

⚙️ Configuration

# ─────────────────────────────────────────────────────────────────
#
#  MiniMessage format: https://docs.advntr.dev/minimessage/format.html
#
# ─────────────────────────────────────────────────────────────────

prefix: "<gray>[<#ff6060>Dirty Detect<gray>]<reset>"

staff-permission: "dirtydetect.staff"

# true  -> punishment announcements are sent to ALL online players
# false -> only players with the staff-permission see them
broadcast-to-all: true # Default true

# Placeholders: %player%, %mod%
messages:
  punished: " <white>Player <yellow>%player%</yellow> was caught using \
<red>%mod%</red> and has been punished."
  alert: " <gold>[ALERT] <white>Player <yellow>%player%</yellow> may be \
using <gold>%mod%</gold>."

punish:
  command: "ban %player% [Dirty Detect] Hacked client detected (%mod%)."

  mods:
    Wurst:
      key: "key.wurst.gui"

    Meteor:
      key: "key.meteor.openGui"

    LiquidBounce:
      key: "key.liquidbounce.panel"

    Aristois:
      key: "key.aristois.panel"

    Future:
      key: "key.future.clickgui"

alert:
  mods:
    OptiFine:
      key: "key.zoom"

📦 Installation

1. Download the latest DirtyDetect.jar from the Releases page.
2. Place the .jar file into your server's plugins/ folder.
3. Start or restart your server -> the plugin will generate a default config.yml inside plugins/DirtyDetect/.
4. Edit config.yml to your liking (notification mode, detection command, prefix, mods, etc.).
5. Run /dirtydetect reload to apply any changes without a restart.

---