# \[110,143,993,995] IMAP/POP3 Enumeration

**GUI Tools:**

* Evolution: `sudo apt-get install evolution`

> Note: If an error appears when starting evolution indicating "bwrap: Can't create file at ...", use this command to start evolution `export WEBKIT_FORCE_SANDBOX=0 && evolution`.

{% embed url="<https://www.youtube.com/watch?v=xelO2CiaSVs>" %}

### Automatic tools to enumerate

{% embed url="<https://github.com/dafthack/MailSniper>" %}

{% embed url="<https://github.com/0xZDH/o365spray>" %}

{% embed url="<https://github.com/ustayready/CredKing>" %}

```bash

#Enumerate the service by using nmap
Intrusionz3r0X@htb[/htb]$ sudo nmap 10.129.14.128 -sV -p110,143,993,995 -sC

#Log in by using curl and list the folders
Intrusionz3r0X@htb[/htb]$ curl -k 'imaps://10.129.14.128' --user robin:robin -v

#Select the mailbox DEV.DEPARTMENT.INT and list ALL
Intrusionz3r0X@htb[/htb]$ curl -k 'imaps://10.129.42.195/DEV.DEPARTMENT.INT?ALL' --user robin:robin

#Read the email with index #1
Intrusionz3r0X@htb[/htb]$ curl -k 'imaps://10.129.42.195/DEV.DEPARTMENT.INT;MAILINDEX=1' --user robin:robin

#OpenSSL - TLS Encrypted Interaction POP3
Intrusionz3r0X@htb[/htb]$ openssl s_client -connect 10.129.14.128:pop3s

#OpenSSL - TLS Encrypted Interaction IMAP
Intrusionz3r0X@htb[/htb]$ openssl s_client -connect 10.129.14.128:imaps

#User enumeration
Intrusionz3r0X@htb[/htb]$ hydra -L users.txt -p 'Company01!' -f 10.10.110.20 pop3

#Manual user enumeration example
Intrusionz3r0X@htb[/htb]$ telnet 10.10.110.20 110

Trying 10.10.110.20...
Connected to 10.10.110.20.
Escape character is '^]'.
+OK POP3 Server ready

USER julio

-ERR

USER john

+OK

#Open Rely attack

Intrusionz3r0X@htb[/htb]# swaks --from notifications@inlanefreight.com --to employees@inlanefreight.com --header 'Subject: Company Notification' --body 'Hi All, we want to hear from you! Please complete the following survey. http://mycustomphishinglink.com/' --server 10.10.11.213
```

### **IMAP Commands**

| **Command**                     | **Description**                                                                                               |
| ------------------------------- | ------------------------------------------------------------------------------------------------------------- |
| `1 LOGIN username password`     | User's login.                                                                                                 |
| `1 LIST "" *`                   | Lists all directories.                                                                                        |
| `1 CREATE "INBOX"`              | Creates a mailbox with a specified name.                                                                      |
| `1 DELETE "INBOX"`              | Deletes a mailbox.                                                                                            |
| `1 RENAME "ToRead" "Important"` | Renames a mailbox.                                                                                            |
| `1 LSUB "" *`                   | Returns a subset of names from the set of names that the User has declared as being `active` or `subscribed`. |
| `1 SELECT INBOX`                | Selects a mailbox so that messages in the mailbox can be accessed.                                            |
| `1 UNSELECT INBOX`              | Exits the selected mailbox.                                                                                   |
| `1 FETCH <ID> all`              | Retrieves data associated with a message in the mailbox.                                                      |
| `1 CLOSE`                       | Removes all messages with the `Deleted` flag set.                                                             |
| `1 LOGOUT`                      | Closes the connection with the IMAP server.                                                                   |

### **POP3 Commands**

| **Command**     | **Description**                                             |
| --------------- | ----------------------------------------------------------- |
| `USER username` | Identifies the user.                                        |
| `PASS password` | Authentication of the user using its password.              |
| `STAT`          | Requests the number of saved emails from the server.        |
| `LIST`          | Requests from the server the number and size of all emails. |
| `RETR id`       | Requests the server to deliver the requested email by ID.   |
| `DELE id`       | Requests the server to delete the requested email by ID.    |
| `CAPA`          | Requests the server to display the server capabilities.     |
| `RSET`          | Requests the server to reset the transmitted information.   |
| `QUIT`          | Closes the connection with the POP3 server.                 |


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://intrusionz3r0.gitbook.io/intrusionz3r0/enumeration/110-143-993-995-imap-pop3-enumeration.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.