hacktricks/network-services-pentesting/43-pentesting-whois.md

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# 43 - Pentesting WHOIS
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***
## Informações Básicas
O protocolo **WHOIS** serve como um método padrão para **consultar os registrantes ou detentores de vários recursos da Internet** através de bancos de dados específicos. Esses recursos abrangem nomes de domínio, blocos de endereços IP e sistemas autônomos, entre outros. Além disso, o protocolo encontra aplicação no acesso a um espectro mais amplo de informações.
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**Porta padrão:** 43
```
PORT STATE SERVICE
43/tcp open whois?
```
## Enumerar
Obtenha todas as informações que um serviço whois tem sobre um domínio:
```bash
whois -h <HOST> -p <PORT> "domain.tld"
echo "domain.ltd" | nc -vn <HOST> <PORT>
```
Notice que às vezes, ao solicitar informações a um serviço WHOIS, o banco de dados utilizado aparece na resposta:
![](<../.gitbook/assets/image (301).png>)
Além disso, o serviço WHOIS sempre precisa usar um **banco de dados** para armazenar e extrair as informações. Assim, uma possível **SQLInjection** pode estar presente ao **consultar** o banco de dados a partir de algumas informações fornecidas pelo usuário. Por exemplo, fazendo: `whois -h 10.10.10.155 -p 43 "a') or 1=1#"` você poderia **extrair todas** as **informações** salvas no banco de dados.
## Shodan
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* `port:43 whois`
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## HackTricks Automatic Commands
```
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Protocol_Name: WHOIS #Protocol Abbreviation if there is one.
Port_Number: 43 #Comma separated if there is more than one.
Protocol_Description: WHOIS #Protocol Abbreviation Spelled out
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Entry_1:
Name: Notes
Description: Notes for WHOIS
Note: |
The WHOIS protocol serves as a standard method for inquiring about the registrants or holders of various Internet resources through specific databases. These resources encompass domain names, blocks of IP addresses, and autonomous systems, among others. Beyond these, the protocol finds application in accessing a broader spectrum of information.
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https://book.hacktricks.xyz/pentesting/pentesting-smtp
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Entry_2:
Name: Banner Grab
Description: Grab WHOIS Banner
Command: whois -h {IP} -p 43 {Domain_Name} && echo {Domain_Name} | nc -vn {IP} 43
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```
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