nxc_spray.sh

Bash script used for password spraying NetExec-supported protocols.

NOTE: I have not tested spraying SSH, MSSQL, or WINRM. NXC supports those protocol via the same syntax as SMB and LDAP, so it should work as intended. Your mileage may vary.

Prerequisites

Install NetExec. Instructions on how-to can be found here: https://www.netexec.wiki/getting-started/installation/installation-on-unix.

Usage

All arguments are positional and they go in the following order:

1. Protocol to spray (smb, ldap, ssh, mssql, winrm)
2. Number of passwords to spray per cycle.
3. Time to wait between cycles.
4. Location of the file with users to be sprayed.
5. Location of the file with passwords to be sprayed.
6. Target to authenticate against (DC or any domain-bound host)
7. DEBUG MODE (Y/N). If "Y" then it will simply print the debug messages without actually running NXC. Since debug will include the command to be run, you can easily test out the tool to ensure it's running as expected.

Internal domain against which the users are authenticated against can be controlled via two methods:

1. Specify it within your username list by prefixing the DOMAIN\ or @DOMAIN to your usernames.
2. Leave out the above modification and let NXC use the domain for which the target device is configured for. (I.e. if you're spraying against DC01.ACME.COM or EXCH.ACME.COM then all users will be tested against ACME.COM).

nxc_spray.sh {protocol (smb,ldap,mssql,ssh,winrm)} {# of passwords per spray} {time to wait between sprays} {user file} {password file} {target} {test run? prints debug only (y/n)}

I highly recommend supplementing this command with | tee -a nxc_spray.out so that you don't hit bash line limits and lose output. Plus it creates a nice log to be reviewed once all sprays are done.

Sample usage

./nxc_spray.sh smb 4 30 creds/users.txt creds/passw.txt 10.0.0.1 n | tee -a nxc_spray.out

This will spray 4 passwords every 30 minutes against the usernames within creds/users.txt using passwords from creds/passw.txt against host 10.0.0.1 with no debug (because we want it to run). The output of the whole run is saved to nxc_spray.out due to the | tee -a nxc_spray.out (however, this is optional, you can also redirect all output to file if you wish with >> nxc_spray.out).