hacktricks/pentesting/43-pentesting-whois.md

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<details>
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# 43 - Pentesting WHOIS
## Basic Information
**WHOIS** (pronounced as the phrase "who is") is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block or an autonomous system, but is also used for a wider range of other information. (From [here](https://en.wikipedia.org/wiki/WHOIS))
**Default port:** 43
```
PORT STATE SERVICE
43/tcp open whois?
```
## Enumerate
Get all the information that a whois service has about a domain:
```bash
whois -h <HOST> -p <PORT> "domain.tld"
echo "domain.ltd" | nc -vn <HOST> <PORT>
```
Notice than sometimes when requesting for some information to a WHOIS service the database being used appears in the response:
![](<../.gitbook/assets/image (147).png>)
Also, the WHOIS service always needs to use a **database** to store and extract the information. So, a possible **SQLInjection** could be present when **querying** the database from some information provided by the user. For example doing: `whois -h 10.10.10.155 -p 43 "a') or 1=1#"` you could be able to **extract all** the **information** saved in the database.
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## Shodan
* `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: |
WHOIS (pronounced as the phrase "who is") is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block or an autonomous system, but is also used for a wider range of other information.
https://book.hacktricks.xyz/pentesting/pentesting-smtp
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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```
2022-04-28 16:01:33 +00:00
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