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Nuclei Templates

Merlin C2 JARM - Detect

ID: merlin-c2-jarm

Severity: info

Author: pussycat0x

Tags: jarm,network,c2,ir,osint,cti,merlin,tcp

Description

Section titled “Description”

Merlin is a post-exploit Command & Control (C2) tool, also known as a Remote Access Tool (RAT), that communicates using the HTTP/1.1, HTTP/2, and HTTP/3 protocols. HTTP/3 is the combination of HTTP/2 over the Quick UDP Internet Connections (QUIC) protocol. This tool was the result of my work evaluating HTTP/2 in a paper titled Practical Approach to Detecting and Preventing Web Application Attacks over HTTP/2. Merlin is also my first attempts at learning Golang.

YAML Source

Section titled “YAML Source”
id: merlin-c2-jarm


info:
  name: Merlin C2 JARM - Detect
  author: pussycat0x
  severity: info
  description: |
    Merlin is a post-exploit Command & Control (C2) tool, also known as a Remote Access Tool (RAT), that communicates using the HTTP/1.1, HTTP/2, and HTTP/3 protocols. HTTP/3 is the combination of HTTP/2 over the Quick UDP Internet Connections (QUIC) protocol. This tool was the result of my work evaluating HTTP/2 in a paper titled Practical Approach to Detecting and Preventing Web Application Attacks over HTTP/2. Merlin is also my first attempts at learning Golang.
  reference:
    - https://github.com/cedowens/C2-JARM
    - https://merlin-c2.readthedocs.io/en/latest/
  metadata:
    max-request: 1
  tags: jarm,network,c2,ir,osint,cti,merlin,tcp
tcp:
  - inputs:
      - data: 2E
        type: hex
    host:
      - "{{Hostname}}"
    matchers:
      - type: dsl
        dsl:
          - "jarm(Hostname) == '29d21b20d29d29d21c41d21b21b41d494e0df9532e75299f15ba73156cee38'"
# digest: 4b0a00483046022100e326eac530c418ae94fa52babb148bb0c78bf1101150657f1c124ab24b8d8fdb022100a84849dbe618109fa1186841d798f305268d7e147c20ea123139d697c4d1f031:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "network/jarm/c2/merlin-c2-jarm.yaml"

View on Github