Overview

This document will provide detailed information to forward logs to Seceon SIEM Tool when the Microsoft Server serves as Domain Controller, DNS, DHCP, FTP, Apache, Windows AD, Windows MS Exchange, and Windows MSSQL role.

Prerequisite

Microsoft Server serves as DNS & DHCP.along with Windows AD+Windows MS Exchange+Windows MSSQL + Windows IIS
Nxlog Utility needs to be installed on the Server with the required privileges.
The NXLog configuration file is comprised of blocks and directives. Blocks are similar to XML tags containing multiple directives. Directive names are not case-sensitive but arguments sometimes are.
Ref. link: Configuration overview | NXLog Legacy Documentation
Ref Link Nxlog: https://nxlog.co/downloads/nxlog-ce?_gl=1*1kob2ea*_ga*MTcxNDY1NzMyLjE2NzA1MjEyNjM.*_ga_M5K1E1X2KD*MTY3MTQ0NjgxMi42LjAuMTY3MTQ0NjgxMi42MC4wLjA.#nxlog-community-edition

Configuration Steps

This is a sample configuration file. See the nxlog reference manual about
configuration options. It should be installed locally
Please set the ROOT to the folder your nxlog was installed into, otherwise, it will not start. Additionally, ensure that some of the placeholders are updated for your environment. Examples of placeholders are CCE_IP_ADDRESS, and filenames for logfiles to read from.

## Please set the ROOT to the folder your nxlog was installed into,
## otherwise it will not start.

define ROOT C:\Program Files\nxlog
#define ROOT C:\Program Files (x86)\nxlog
#define ROOT C:\Program Files (x86)\nxlog

Moduledir %ROOT%\modules
CacheDir %ROOT%\data
Pidfile %ROOT%\data\nxlog.pid
SpoolDir %ROOT%\data
LogFile %ROOT%\data\nxlog.log

<Extension _json>
Module xm_json
</Extension>
<Extension syslog>
Module xm_syslog
</Extension>

define aisiem                                                                       \
1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 17, 18,19, 20, 21, 104, 258, 259, 260,  \
261, 262, 500, 517, 520, 528, 529, 530, 531, 532, 533, 534, 535, 536, 537, 538, 539,\
540, 551, 552, 565, 600, 608, 609, 621, 622, 626, 627, 628, 629, 630, 636, 642, 644,\
645, 647, 632, 663, 664, 671, 673, 675, 676, 677, 679, 680, 681, 682, 683, 684, 689,\
690, 692, 1001, 1006, 1007, 1008, 1015, 1102, 1116, 1117, 1118, 1119, 2003, 2100,   \
7034, 4624, 4625, 4634, 4647, 4649, 4656, 4657, 4659, 4661, 4663, 4670, 4688, 4697, \
4704, 4705, 4717, 4718, 4720, 4722, 4723, 4724, 4725, 4726, 4727, 4728, 4729, 4730, \
4731, 4732, 4733, 4734, 4735, 4737, 4738, 4739, 4740, 4741, 4742, 4743, 4744, 4745, \
4746, 4747, 4748, 4749, 4750, 4751, 4752, 4753, 4754, 4755, 4756, 4757, 4758, 4759, \
4760, 4761, 4762, 4763, 4764, 4767, 4769, 4771, 4772, 4773, 4775, 4776, 4777, 4778, \
4779, 4780, 4782, 4783, 4784, 4785, 4786, 4787, 4788, 4789, 4790, 4791, 4793, 4794, \
4797, 4798, 4800, 4801, 4802, 4803, 5001, 5004, 5007, 5010, 5012, 5136, 5137, 5140, \
5141, 5142, 5143, 5144, 5145, 5376, 5377, 7045, 8003, 8004, 8007, 64004

<Input in>
      Module im_msvistalog
      Query <QueryList>\
                  <Query Id="0">\
                        <Select Path="Security">* </Select>\
                        <Select Path="Application">* </Select>\
                        <Select Path="Setup">* </Select>\
                        <Select Path="System">* </Select>\
                  </Query>\
            </QueryList>
            <Exec>
                  if ($EventID NOT IN (%aisiem%)) drop();
            </Exec>
</Input>

<Output out>    
  Module om_udp    
  Host 10.11.23.234  
  Port 5154    
  Exec to_json();
</Output>

<Route 1>    
  Path in => out
</Route>

## DNS Logs

<Input DNS_In>
Module im_file
File "C:\DNS LOG\dns*"
SavePos TRUE
InputType LineBased
Exec if $raw_event =~ /^#/ drop();
Exec $Message = $raw_event;
</Input>

<Output DNS_Out>

Module om_udp

Host 10.11.23.234 <CCE IP Address>
Port 514
Exec $SyslogFacilityValue = 2;
Exec $SourceName = 'windows_dns_logs';
Exec to_syslog_bsd();

<Route DNS>
Path DNS_In => DNS_Out
</Route>

## DHCP Logs

<Input DHCP_In>
Module im_file
File "C:\Windows\system32\dhcp\DhcpSrvLog*"
SavePos TRUE
Exec if $raw_event =~ /^#/ drop();
Exec $Message = $raw_event;
</Input>

<Output DHCP_Out>

Module om_udp
Host 10.11.23.234
Port 514
Exec $SyslogFacilityValue = 2;
Exec $SourceName = 'windows_dhcp_logs';
Exec to_syslog_bsd();
</Output>

<Route DHCP>
Path DHCP_In=> DHCP_Out
</Route>

## IIS Logs

<Input in_iis>
Module im_file
File "C:\\inetpub\\logs\\LogFiles\\W3SVC*\\u_ex*"
SavePos TRUE
ReadFromLast TRUE
Exec if $raw_event =~ /^#/ drop();
Exec $Message = $raw_event;
</Input>

<Output out_iis>
Module om_udp
Host 10.11.23.234
Port 514
Exec $SyslogFacilityValue = 2;
Exec $SourceName = 'windows_iis_logs';
Exec to_syslog_bsd();
</Output>

<Route in-to-out>
Path in_iis => out_iis
</Route>

## Exchange Logs

<Extension syslog>
Module xm_syslog
</Extension>

define BASEDIR C:\Program Files\Microsoft\Exchange Server\V15\TransportRoles\Logs\MessageTracking

<Input in_exchange>
Module im_file
File '%BASEDIR%\MSGTRK*-*.LOG'
SavePos TRUE
Exec if $raw_event =~ /HealthMailbox/ drop();
Exec if $raw_event =~ /^#/ drop();
</Input>

<Output out_exchange>
Module om_udp
Host 10.11.23.234
Port 514
Exec $SyslogFacilityValue = 2;
Exec $SourceName = 'exchange_msgtrk_log';
Exec to_syslog_bsd();

</Output>

<Route exchange>
Path in_exchange => out_exchange
</Route>

## SQL Logs

<Input in_mssql>
Module          im_msvistalog
SavePos         FALSE
ReadFromLast    TRUE
Exec   $Message = $raw_event;
# Finding some values:
Exec    if $raw_event =~ /action_id:(\S+)/ $Action_ID = $1;
Exec    if $raw_event =~ /database_name:(\S+)/ $DataBase = $1;
Exec    if $raw_event =~ /server_instance_name:(\S+)/ $SV_Instace = $1;
Exec    if $raw_event =~ /session_server_principal_name:(\S+)/ $User = $1;
Exec    if $raw_event =~ /AUDIT_SUCCESS/\
{\
$Result = 'Success';\
}\
else\
$Result = 'Failure';
# Replace white spaces
Exec            $Message = replace($Message, "\t", " "); $Message = replace($Message, "\n", " "); $Message = replace($Message, "\r", " ");
</Input>

<Output out_mssql>
    Module          om_udp
    Host            10.11.23.234
    Port            514
    # Ensure we send in the proper format:
    Exec           $Hostname = hostname_fqdn();
    Exec            mssql_csv->to_csv(); $raw_event = $Hostname + ' mssql_logs: ' + $raw_event;
</Output>

<Route mssql>
    Path            in_mssql => out_mssql
</Route>

## FTP Logs

<Input FTP_In>
Module im_file
File "C:\Program Files (x86)\Ipswitch\WS_FTP Server\Logging Server\Logs*"
SavePos TRUE
InputType LineBased
Exec if $raw_event =~ /^#/ drop();
Exec $Message = $raw_event;
</Input>

<Output FTP_Out>

Module om_udp

Host 10.11.23.234
Port 514
Exec $SyslogFacilityValue = 2;
Exec $SourceName = 'windows_ftp_logs';
Exec to_syslog_bsd();

</Output>

<Route FTP>
Path FTP_In => FTP_Out
</Route>

## Apache Logs

<Input Apache_In>
	Module im_file
	File "C:\Program Files\Apache Software Foundation\Tomcat 9.0_Tomcat9.0\localhost_access_log.*"
	SavePos TRUE
	InputType LineBased
	Exec if $raw_event =~ /^#/ drop();
	Exec $Message = $raw_event;
</Input>

<Output Apache_Out>
	Module om_udp
	Host 10.11.23.234
	Port 514
	Exec $SyslogFacilityValue = 2;
	Exec $SourceName = 'apache';
	Exec to_syslog_bsd();
</Output>

<Route Apache_Out>
	Path Apache_In => Apache_Out
</Route>

Note :

To Enable the logging of IIS, DNS, and MSSQL, Please follow the below link instruction.

For IIS: Enable Logging on Windows IIS server

For MSSQL: Microsoft SQL Server through NXLog

For DNS: To enable DNS diagnostic logging

For Windows Events: Enable Windows Events Logs(Audit Policies)

Verification Steps:

This can validate the success of configuration either on UI or on the CCE server.

Verification through UI

Open UI >>Systems. Navigate to System >> Log/Flow Collection Status

2.Under The source device, the IP address section of the device configured will reflect.

Verification Through the CCE server

“sudo tcpdump -i any host 5154 or 514 and host <IP address> -AAA” command should be run on the CCE server to check whether or not we are getting logs.

Seceon Public Portal

Forwarding Windows Server logs to NXLog

Overview

Prerequisite

Configuration Steps

Note :

Verification Steps: