By Cas van Cooten (@chvancooten), with special thanks to some awesome folks:

Kadir Yamamoto (@yamakadi), Furkan Göksel (@frkngksl) , Fabian Mosch (@S3cur3Th1sSh1t), Rafael Félix (@b1scoito), Guillaume Caillé (@OffenseTeacher), and many others!

If NimPlant has been useful to you and/or you like my work in general, your support is very welcome:

Feature Overview

• Lightweight and configurable implant written in the Nim and Rust programming languages
• Pretty web GUI that will make you look cool during all your ops
• Encryption and compression of all traffic by default, obfuscates static strings in implant artifacts
• Support for several implant types, including native binaries (exe/dll), shellcode or self-deleting executables
• Wide selection of commands focused on early-stage operations including local enumeration, file or registry management, and web interactions
• Easy deployment of more advanced functionality or payloads via inline-execute, shinject (using dynamic invocation), powershell in a custom runspace, or in-thread execute-assembly
• Support for operations on any platform, implant only targeting x64 Windows for now
• Comprehensive logging of all interactions and file operations
• Much, much more, just see below :)

Instructions

Installation

A modern version of Python3 is required to run Nimplant.

Server

• Install requirements.txt from the server folder (pip3 install -r server/requirements.txt).

Implant (Nim)

• Install the Nim toolchain for your platform (installation via choosenim is recommended, as apt doesn't always have the latest version).
• Install required packages using the Nimble package manager (cd client; nimble install -d).
• If you're on Linux or MacOS, install the mingw toolchain for your platform (brew install mingw-w64 or apt install mingw-w64).
• If you're on ArchLinux specifically, modify your Mingw config as per this gist (thanks @tothi!).

Implant (Rust)

• Install the Rust toolchain (installation via rustup is recommended).
• Install the MinGW windows target: rustup target add x86_64-pc-windows-gnu.
• Recommended for increased opsec: Modify your ~/.cargo/config.toml file as per Cargo.toml and use the nighly build chain (rustup default nightly).

Note: Even if compiling on Windows, the x86_64-pc-windows-gnu target is recommended. It results in slightly larger binaries, but appears to be more stable when shellcode is generated from the resulting DLL. You may modify rust-toolchain.toml to change the target to x86_64-pc-windows-msvc, but generated shellcode may not work correctly in all cases.

Getting Started

Configuration

Before using NimPlant, create the configuration file config.toml. It is recommended to copy config.toml.example and work from there.

An overview of settings is provided below.

Category	Setting	Description
server	ip	The IP that the C2 web server (including API) will listen on. Recommended to use 127.0.0.1, only use 0.0.0.0 when you have setup proper firewall or routing rules to protect the C2.
server	port	The port that the C2 web server (including API) will listen on.
listener	type	The listener type, either HTTP or HTTPS. HTTPS options configured below.
listener	sslCertPath	The local path to a HTTPS certificate file (e.g. requested via LetsEncrypt CertBot or self-signed). Ignored when listener type is 'HTTP'.
listener	sslKeyPath	The local path to the corresponding HTTPS certificate private key file. Password will be prompted when running the NimPlant server if set. Ignored when listener type is 'HTTP'.
listener	hostname	The listener hostname. If not empty (""), NimPlant will use this hostname to connect. Make sure you are properly routing traffic from this host to the NimPlant listener port.
listener	ip	The listener IP. Required even if 'hostname' is set, as it is used by the server to register on this IP.
listener	port	The listener port. Required even if 'hostname' is set, as it is used by the server to register on this port.
listener	registerPath	The URI path that new NimPlants will register with.
listener	taskPath	The URI path that NimPlants will get tasks from.
listener	resultPath	The URI path that NimPlants will submit results to.
nimplant	riskyMode	Compile NimPlant with support for risky commands. Operator discretion advised. Disabling will remove support for execute-assembly, powershell, shell and shinject.
nimplant	sleepMask	Whether or not to use Ekko sleep mask instead of regular sleep calls for Nimplants. Only works with regular executables for now!
nimplant	sleepTime	The default sleep time in seconds for new NimPlants.
nimplant	sleepJitter	The default jitter in percent for new NimPlants.
nimplant	killDate	The kill date for Nimplants (format: yyyy-MM-dd). Nimplants will exit if this date has passed.
nimplant	userAgent	The user-agent used by NimPlants. The server also uses this to validate NimPlant traffic, so it is recommended to choose a UA that is inconspicuous, but not too prevalent.