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Merlin

Last updated 1 year ago

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Merlin

Merlin is a cross-platform post-exploitation Command & Control server and agent written in Go.

Highlighted features:

  • Supported C2 Protocols: http/1.1 clear-text, http/1.1 over TLS, HTTP/2, HTTP/2 clear-text (h2c), http/3 (http/2 over QUIC)

  • Domain Fronting

  • Execute .NET assemblies in-process with invoke-assembly or in a sacrificial process with execute-assembly

  • Execute arbitrary Windows executables (PE) in a sacrificial process with execute-pe

  • Various shellcode execution techniques: CreateThread, CreateRemoteThread, RtlCreateUserThread, QueueUserAPC

  • Encrypted JWT for authentication

Download the latest compiled version of Merlin Server from the [releases](https://github.com/Ne0nd0g/merlin/releases) section
> 
> 
> 
> The Server package contains a compiled Agent for all the major operating systems in the `data/bin` directory
> 

2.

Extract the files with 7zip using the `x` function **The password is: `merlin`**

3.

Start Merlin

4.

Configure a [listener](https://merlin-c2.readthedocs.io/en/latest/server/menu/listeners.html)

5.

Deploy an agent. See [Agent Execution Quick Start Guide](https://merlin-c2.readthedocs.io/en/latest/quickStart/agent.html) for examples

6.

Pwn, Pivot, Profit

```
mkdir /opt/merlin;cd /opt/merlin
wget https://github.com/Ne0nd0g/merlin/releases/latest/download/merlinServer-Linux-x64.7z
7z x merlinServer-Linux-x64.7z
sudo ./merlinServer-Linux-x64

```
go get github.com/Ne0nd0g/merlin-agent
  • For a full list of available commands:

Server and Agent: Windows, Linux, macOS (Darwin), MIPS, ARM or anything Go can

Asymmetric Password Authenticated Key Exchange (PAKE)

Agent traffic is an encrypted JWE using PBES2 (RFC 2898) with HMAC SHA-512 as the PRF and AES Key Wrap (RFC 3394) using 256-bit keys for the encryption scheme. ()

Integrated , , and support

C2 traffic message to combat beaconing detections based on a fixed message size

Dynamically change the Agent's hash

support

An introductory blog post can be found here:

The is kept in its own repository so that it can easily be retrieved and compiled:

The is also kept in a separate repository. See the documentation for building instructions.

The Merlin server is a self-contained command line program that requires no installation. You just simply download it and run it. The command-line interface only works great if it will be used by a single operator at a time. The Merlin agent can be controlled through , which features a web-based user interface that enables multiplayer support, and a slew of other features inherent to the project.

Visit the repository in the MythicAgents organizaiton to get started.

The latest development build of Merlin can be downloaded from

To compile Merlin from source, view the page

View the page

View the page for additional information

Join the #merlin channel in the Slack to ask questions, troubleshoot, or provide feedback.

Thanks to for kindly sponsoring Merlin by providing a Goland IDE Open Source license

natively build
Windows DLL Agent
OPAQUE
PBES2_HS512_A256KW
Donut
sRDI
SharpGen
padding
JA3
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https://medium.com/@Ne0nd0g/introducing-merlin-645da3c635a
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https://github.com/Ne0nd0g/merlin
Merlin