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221 lines
8.2 KiB
Markdown
221 lines
8.2 KiB
Markdown
# 143,993 - Pentesting IMAP
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{% hint style="success" %}
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Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
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Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
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<details>
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<summary>Support HackTricks</summary>
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* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
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* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
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* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
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</details>
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{% endhint %}
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## Internet Message Access Protocol
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The **Internet Message Access Protocol (IMAP)** is designed for the purpose of enabling users to **access their email messages from any location**, primarily through an Internet connection. In essence, emails are **retained on a server** rather than being downloaded and stored on an individual's personal device. This means that when an email is accessed or read, it is done **directly from the server**. This capability allows for the convenience of checking emails from **multiple devices**, ensuring that no messages are missed regardless of the device used.
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By default, the IMAP protocol works on two ports:
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* **Port 143** - this is the default IMAP non-encrypted port
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* **Port 993** - this is the port you need to use if you want to connect using IMAP securely
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```
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PORT STATE SERVICE REASON
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143/tcp open imap syn-ack
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```
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## Banner grabbing
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```bash
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nc -nv <IP> 143
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openssl s_client -connect <IP>:993 -quiet
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```
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### NTLM Auth - Information disclosure
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If the server supports NTLM auth (Windows) you can obtain sensitive info (versions):
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```
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root@kali: telnet example.com 143
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* OK The Microsoft Exchange IMAP4 service is ready.
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>> a1 AUTHENTICATE NTLM
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+
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>> TlRMTVNTUAABAAAAB4IIAAAAAAAAAAAAAAAAAAAAAAA=
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+ TlRMTVNTUAACAAAACgAKADgAAAAFgooCBqqVKFrKPCMAAAAAAAAAAEgASABCAAAABgOAJQAAAA9JAEkAUwAwADEAAgAKAEkASQBTADAAMQABAAoASQBJAFMAMAAxAAQACgBJAEkAUwAwADEAAwAKAEkASQBTADAAMQAHAAgAHwMI0VPy1QEAAAAA
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```
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Or **automate** this with **nmap** plugin `imap-ntlm-info.nse`
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### [IMAP Bruteforce](../generic-methodologies-and-resources/brute-force.md#imap)
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## Syntax
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IMAP Commands examples from [here](https://donsutherland.org/crib/imap):
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```
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Login
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A1 LOGIN username password
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Values can be quoted to enclose spaces and special characters. A " must then be escape with a \
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A1 LOGIN "username" "password"
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List Folders/Mailboxes
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A1 LIST "" *
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A1 LIST INBOX *
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A1 LIST "Archive" *
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Create new Folder/Mailbox
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A1 CREATE INBOX.Archive.2012
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A1 CREATE "To Read"
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Delete Folder/Mailbox
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A1 DELETE INBOX.Archive.2012
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A1 DELETE "To Read"
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Rename Folder/Mailbox
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A1 RENAME "INBOX.One" "INBOX.Two"
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List Subscribed Mailboxes
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A1 LSUB "" *
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Status of Mailbox (There are more flags than the ones listed)
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A1 STATUS INBOX (MESSAGES UNSEEN RECENT)
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Select a mailbox
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A1 SELECT INBOX
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List messages
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A1 FETCH 1:* (FLAGS)
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A1 UID FETCH 1:* (FLAGS)
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Retrieve Message Content
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A1 FETCH 2 body[text]
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A1 FETCH 2 all
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A1 UID FETCH 102 (UID RFC822.SIZE BODY.PEEK[])
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Close Mailbox
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A1 CLOSE
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Logout
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A1 LOGOUT
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```
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### Evolution
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```
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apt install evolution
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```
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.png>)
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### CURL
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Basic navigation is possible with [CURL](https://ec.haxx.se/usingcurl/usingcurl-reademail#imap), but the documentation is light on details so checking the [source](https://github.com/curl/curl/blob/master/lib/imap.c) is recommended for precise details.
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1. Listing mailboxes (imap command `LIST "" "*"`)
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```bash
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curl -k 'imaps://1.2.3.4/' --user user:pass
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```
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2. Listing messages in a mailbox (imap command `SELECT INBOX` and then `SEARCH ALL`)
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```bash
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curl -k 'imaps://1.2.3.4/INBOX?ALL' --user user:pass
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```
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The result of this search is a list of message indicies.
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Its also possible to provide more complex search terms. e.g. searching for drafts with password in mail body:
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```bash
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curl -k 'imaps://1.2.3.4/Drafts?TEXT password' --user user:pass
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```
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A nice overview of the search terms possible is located [here](https://www.atmail.com/blog/imap-commands/).
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3. Downloading a message (imap command `SELECT Drafts` and then `FETCH 1 BODY[]`)
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```bash
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curl -k 'imaps://1.2.3.4/Drafts;MAILINDEX=1' --user user:pass
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```
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The mail index will be the same index returned from the search operation.
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It is also possible to use `UID` (unique id) to access messages, however it is less conveniant as the search command needs to be manually formatted. E.g.
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```bash
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curl -k 'imaps://1.2.3.4/INBOX' -X 'UID SEARCH ALL' --user user:pass
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curl -k 'imaps://1.2.3.4/INBOX;UID=1' --user user:pass
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```
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Also, possible to download just parts of a message, e.g. subject and sender of first 5 messages (the `-v` is required to see the subject and sender):
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```bash
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$ curl -k 'imaps://1.2.3.4/INBOX' -X 'FETCH 1:5 BODY[HEADER.FIELDS (SUBJECT FROM)]' --user user:pass -v 2>&1 | grep '^<'
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```
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Although, its probably cleaner to just write a little for loop:
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```bash
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for m in {1..5}; do
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echo $m
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curl "imap://1.2.3.4/INBOX;MAILINDEX=$m;SECTION=HEADER.FIELDS%20(SUBJECT%20FROM)" --user user:pass
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done
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```
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## Shodan
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* `port:143 CAPABILITY`
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* `port:993 CAPABILITY`
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## HackTricks Automatic Commands
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```
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Protocol_Name: IMAP #Protocol Abbreviation if there is one.
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Port_Number: 143,993 #Comma separated if there is more than one.
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Protocol_Description: Internet Message Access Protocol #Protocol Abbreviation Spelled out
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Entry_1:
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Name: Notes
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Description: Notes for WHOIS
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Note: |
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The Internet Message Access Protocol (IMAP) is designed for the purpose of enabling users to access their email messages from any location, primarily through an Internet connection. In essence, emails are retained on a server rather than being downloaded and stored on an individual's personal device. This means that when an email is accessed or read, it is done directly from the server. This capability allows for the convenience of checking emails from multiple devices, ensuring that no messages are missed regardless of the device used.
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https://book.hacktricks.xyz/pentesting/pentesting-imap
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Entry_2:
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Name: Banner Grab
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Description: Banner Grab 143
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Command: nc -nv {IP} 143
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Entry_3:
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Name: Secure Banner Grab
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Description: Banner Grab 993
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Command: openssl s_client -connect {IP}:993 -quiet
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Entry_4:
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Name: consolesless mfs enumeration
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Description: IMAP enumeration without the need to run msfconsole
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Note: sourced from https://github.com/carlospolop/legion
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Command: msfconsole -q -x 'use auxiliary/scanner/imap/imap_version; set RHOSTS {IP}; set RPORT 143; run; exit'
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```
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{% hint style="success" %}
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Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
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Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
|
|
|
|
<details>
|
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|
|
<summary>Support HackTricks</summary>
|
|
|
|
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
|
|
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
|
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* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
|
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</details>
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{% endhint %}
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