> For the complete documentation index, see [llms.txt](https://w0lf-f4ng.gitbook.io/cheat-sheet/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://w0lf-f4ng.gitbook.io/cheat-sheet/pentesting-infraestructura/information-gathering.md).

# Information Gathering

## Información del objetivo

### WHOIS

Protocolo usado para obtener información de todos los dominios registrados.

Este protocolo utiliza el puerto TCP 43.

{% tabs %}
{% tab title="Windows" %}
En Windows es necesario descargar el siguiente [software](https://learn.microsoft.com/es-mx/sysinternals/downloads/whois):

```batch
whois.exe google.com
```

{% endtab %}

{% tab title="Linux" %}
En linux ya se tiene pre-instalado el programa:

```bash
whois google.com
```

{% endtab %}

{% tab title="Web" %}

* [Whois Lookup](https://whois.domaintools.com/)
  {% endtab %}
  {% endtabs %}

## DNS

{% tabs %}
{% tab title="Nslookup" %}
Enumeración de IPs de un dominio:

```bash
nslookup google.com
```

Enumeración reversa de una IP al dominio:

```bash
nslookup -type=PTR 8.8.8.8
```

Enumeración de registros DNS asociados a un dominio:

```bash
nslookup -querytype=ANY google.com
```

Enumeración de servidores NS:

```bash
nslookup -type=NS google.com
```

{% endtab %}
{% endtabs %}

## Enumeración de la infraestructura del sitio

Algunos headers de las respuestas de los sitios pueden brindar información de la infraestructura de este, como el WAF, CMS o la versión del servicio.

{% tabs %}
{% tab title="Web" %}
Sitios:

* [Netcraft](https://searchdns.netcraft.com/)
  {% endtab %}

{% tab title="Wappalyzer" %}
Podemos usar el plugin de navegador o su sitio web:

* [Plugin](https://www.wappalyzer.com/apps/)
* [Sitio web](https://www.wappalyzer.com/lookup/)
  {% endtab %}

{% tab title="Whatweb" %}

* [Whatweb](https://github.com/urbanadventurer/WhatWeb)

```bash
whatweb google.com
whatweb google.com -v
```

{% endtab %}

{% tab title="Netcat" %}
Ejemplos:

* [Black Box testing and example](https://wiki.owasp.org/index.php/Testing_for_Web_Application_Fingerprint_\(OWASP-IG-004\)#Black_Box_testing_and_example)
* [Black Box testing](https://wiki.owasp.org/index.php/Fingerprint_Web_Application_Framework_\(OTG-INFO-008\)#Black_Box_testing)

```bash
nc google.com 80
HEAD / HTTP/1.0
```

{% endtab %}
{% endtabs %}

## Enumeración de subdominios

{% tabs %}
{% tab title="Google Dorks" %}

```
site:google.com -inurl:www
site:google.com -site:www.google.com
```

* Para no incluir un subdominio, podemos usar el operador `-`
  {% endtab %}

{% tab title="DNSEnum" %}

* [DNSEnum](https://github.com/SparrowOchon/dnsenum2)

```bash
dnsenum google.com
dnsenum google.com -f subdomains_wordlist.txt
```

{% endtab %}
{% endtabs %}


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