{"id":142,"date":"2020-07-08T11:03:15","date_gmt":"2020-07-08T11:03:15","guid":{"rendered":"https:\/\/cybersecthreat.com\/?p=142"},"modified":"2024-04-01T13:51:27","modified_gmt":"2024-04-01T05:51:27","slug":"enable-mssql-authentication-log-to-eventlog","status":"publish","type":"post","link":"https:\/\/cybersecthreat.com\/zh\/2020\/07\/08\/enable-mssql-authentication-log-to-eventlog\/","title":{"rendered":"Monitor MSSQL authentication with Splunk"},"content":{"rendered":"<p>Today, we are going to discuss how to monitor MSSQL authentication with Splunk.<\/p>\n\n\n\n<p>First of all, we will need to enable MSSQL authentication log. To do so, we will log in to&nbsp;SQL Server Management Studio,&nbsp;simply right-click on your instance, go to &#8220;properties&#8221;, and then click on &#8220;security&#8221;. You will see the screen below, select &#8220;Both failed and successful logins&#8221;, and restart that particular MSSQL instance.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"687\" height=\"563\" src=\"https:\/\/cybersecthreat.com\/wp-content\/uploads\/2020\/07\/enable-mssql-authentication-log-to-eventlog.png\" alt=\"Enable MSSQL authentication log to EventLog\" class=\"wp-image-196\" srcset=\"https:\/\/cybersecthreat.com\/wp-content\/uploads\/2020\/07\/enable-mssql-authentication-log-to-eventlog.png 687w, https:\/\/cybersecthreat.com\/wp-content\/uploads\/2020\/07\/enable-mssql-authentication-log-to-eventlog-300x246.png 300w, https:\/\/cybersecthreat.com\/wp-content\/uploads\/2020\/07\/enable-mssql-authentication-log-to-eventlog-600x492.png 600w\" sizes=\"auto, (max-width: 687px) 100vw, 687px\" \/><\/figure>\n\n\n<style>.kadence-column142_f4f061-57 > .kt-inside-inner-col{display:flex;}.kadence-column142_f4f061-57 > .kt-inside-inner-col,.kadence-column142_f4f061-57 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column142_f4f061-57 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column142_f4f061-57 > .kt-inside-inner-col{flex-direction:column;align-items:center;}.kadence-column142_f4f061-57 > .kt-inside-inner-col > .kb-image-is-ratio-size{align-self:stretch;}.kadence-column142_f4f061-57 > .kt-inside-inner-col > .wp-block-kadence-advancedgallery{align-self:stretch;}.kadence-column142_f4f061-57 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column142_f4f061-57 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column142_f4f061-57{position:relative;}@media all and (max-width: 1024px){.kadence-column142_f4f061-57 > .kt-inside-inner-col{flex-direction:column;justify-content:center;align-items:center;}}@media all and (max-width: 767px){.kadence-column142_f4f061-57 > .kt-inside-inner-col{flex-direction:column;justify-content:center;align-items:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column142_f4f061-57\"><div class=\"kt-inside-inner-col\"><style>.kb-table-of-content-nav.kb-table-of-content-id142_110b4c-c1 .kb-table-of-content-wrap{padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-right:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);padding-left:0px;background-color:rgba(255,255,255,0.99);border-top:3px solid #313131;border-right:3px solid #313131;border-bottom:3px solid #313131;border-left:3px solid #313131;box-shadow:0px 0px 14px 0px #abb8c3;}.kb-table-of-content-nav.kb-table-of-content-id142_110b4c-c1 .kb-table-of-contents-title-wrap{padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.kb-table-of-content-nav.kb-table-of-content-id142_110b4c-c1 .kb-table-of-contents-title{font-size:var(--global-kb-font-size-lg, 2rem);font-weight:bold;font-style:normal;}.kb-table-of-content-nav.kb-table-of-content-id142_110b4c-c1 .kb-table-of-content-wrap .kb-table-of-content-list{color:#d65a02;font-size:var(--global-kb-font-size-md, 1.25rem);font-weight:regular;font-style:normal;margin-top:var(--global-kb-spacing-sm, 1.5rem);margin-right:0px;margin-bottom:0px;margin-left:0px;}.kb-table-of-content-nav.kb-table-of-content-id142_110b4c-c1 .kb-toggle-icon-style-basiccircle .kb-table-of-contents-icon-trigger:after, .kb-table-of-content-nav.kb-table-of-content-id142_110b4c-c1 .kb-toggle-icon-style-basiccircle .kb-table-of-contents-icon-trigger:before, .kb-table-of-content-nav.kb-table-of-content-id142_110b4c-c1 .kb-toggle-icon-style-arrowcircle .kb-table-of-contents-icon-trigger:after, .kb-table-of-content-nav.kb-table-of-content-id142_110b4c-c1 .kb-toggle-icon-style-arrowcircle .kb-table-of-contents-icon-trigger:before, .kb-table-of-content-nav.kb-table-of-content-id142_110b4c-c1 .kb-toggle-icon-style-xclosecircle .kb-table-of-contents-icon-trigger:after, .kb-table-of-content-nav.kb-table-of-content-id142_110b4c-c1 .kb-toggle-icon-style-xclosecircle .kb-table-of-contents-icon-trigger:before{background-color:rgba(255,255,255,0.99);}@media all and (max-width: 1024px){.kb-table-of-content-nav.kb-table-of-content-id142_110b4c-c1 .kb-table-of-content-wrap{margin-left:var(--global-kb-spacing-auto, auto);border-top:3px solid #313131;border-right:3px solid #313131;border-bottom:3px solid #313131;border-left:3px solid #313131;}}@media all and (max-width: 767px){.kb-table-of-content-nav.kb-table-of-content-id142_110b4c-c1 .kb-table-of-content-wrap{margin-left:var(--global-kb-spacing-auto, auto);border-top:3px solid #313131;border-right:3px solid #313131;border-bottom:3px solid #313131;border-left:3px solid #313131;}}<\/style><\/div><\/div>\n\n\n\n<p>After turning on MSSQL authentication, both successful and failure authentication will be logged in <strong>Application<\/strong> Event Log no matter you are using Windows Authentication mode or Mixed mode(SQL Server and Windows Authentication mode). Below list out the Event Code\/Event ID for both successful and failure authentication: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Successful logon: 18453, 18454, 18455<\/li>\n\n\n\n<li>Failure logon: 18456<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-analysis-and-security-monitoring\"> Analysis and Security Monitoring <\/h3>\n\n\n\n<p>Enable MSSQL authentication EventLog is only the first step, and the most important part is to monitor and reviews those audit logs. Some MSSQL instances by default use &#8220;Network Service&#8221; built-in account to start MSSQL service. It will automatically generate both successful and failure logon from this account even if you haven&#8217;t logon to MSSQL using &#8220;Network Service&#8221; account. Therefore, it is advise not to explicit grant database permission to this service account, and monitor the authentication attempts of other privilege account.<\/p>\n\n\n\n<p>When you build the privilege account list, you must explicitly include <strong>ALL default account and built-in account<\/strong>. It is because those default account or built-in account may NOT follow your password lockout policy. The default built-in &#8220;administrator&#8221; with RID 500 is an example for this. You may find the &#8220;administrator&#8221; lockout with EventCode 4740, but this account will automatically unlocked when someone enter the correct password.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-mssql-named-pipe\">MSSQL Named pipe<\/h3>\n\n\n\n<p>In addition, MSSQL provides a method called &#8220;<strong>named pipe<\/strong>&#8221; which can connect to MSSQL via SMB (port 445). For instance, you can connect to a remote MSSQL server using the following syntax:<\/p>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<pre class=\"wp-block-code\"><code>\\\\&lt;Server IP&gt;\\pipe\\MSSQL$SQLEXPRESS\\sql\\query\nnp:\\\\&lt;Server IP&gt;\\pipe\\MSSQL$SQLEXPRESS\\sql\\query<\/code><\/pre>\n<\/div><\/div>\n\n\n\n<p><strong>Named pipe<\/strong> connections support both &#8220;Windows Authentication&#8221; and &#8220;SQL Server Authentication&#8221;. So, whenever there is any named pipe connection, you will see a log entry similar to the following: <\/p>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<pre class=\"wp-block-code\"><code>Login succeeded for user 'sa'. Connection made using SQL Server authentication. &#91;CLIENT: &lt;named pipe&gt;]<\/code><\/pre>\n<\/div><\/div>\n\n\n\n<p>In this case, we do not know whether it is a local or remote connections. Therefore, we need to correlate the Event Code 4624 log to identify whether it is coming from local or connected from remote computer. As &#8220;named pipe&#8221; relies on SMB to authenticate first, the domain users must authenticate to Window system first. So, what we should saw is Event Code 4624 (with Logon Type 3) and Event Code 18454 pair.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-monitoring-mssql-authentication-with-splunk\">Monitoring MSSQL authentication with Splunk<\/h3>\n\n\n\n<p>In this section, we will discuss monitoring MSSQL authentication with Splunk. Splunk provided an app &#8220;<a href=\"https:\/\/splunkbase.splunk.com\/app\/2648\/\">Splunk Add-on for Microsoft SQL Server<\/a>&#8221; to collect such audit logs and more. The mechanism is to <a href=\"https:\/\/docs.splunk.com\/Documentation\/AddOns\/released\/MSSQLServer\/Installationsteps\">configure server auditing on MSSQL DB then set up DB Connect app to retrieve audit and trace logs from Microsoft SQL DB<\/a>. However, in our case, we only need to monitor the authentication log and do not want things getting too complicated. Therefore, we will stick with monitoring Event Log using Splunk.<\/p>\n\n\n\n<p>Now, we need to define some new knowledge objects inside the Splunk_TA_windows app under the local folder. For example, for the first one which is <strong>eventtypes.conf<\/strong>, it will be placed inside $SPLUNK_HOME\/etc\/apps\/Splunk_TA_windows\/local\/ of your Splunk Search Head. In addition, below configuration works for both WinEventLog or XmlWinEventLog. <\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-eventtypes-conf\"> eventtypes.conf <\/h4>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<pre class=\"wp-block-code\"><code>&#91;wineventlog_mssql_authentication]\nsearch = index=wineventlog source=\"XmlWinEventLog:Application\" OR source=\"WinEventLog:Application\" OR sourcetype=\"WMI:WinEventLog:Application\" (EventCode=18453 OR EventCode=18454 OR EventCode=18455) OR (EventCode=18456)<\/code><\/pre>\n<\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-props-conf\"> props.conf <\/h4>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<pre class=\"wp-block-code\"><code>&#91;source::WinEventLog:Application]\nREPORT-authenication_for_mssql = instance_for_mssql_authentication,mssql_authentication_success,mssql_authentication_failure\n\n&#91;source::XmlWinEventLog:Application]\nREPORT-xml_authenication_for_mssql = xml_mssql_authentication_success,xml_mssql_authentication_failure<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-tags-conf\">tags.conf<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;eventtype=wineventlog_mssql_authentication]\nauthentication = enabled\nmssql = enabled<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-transforms-conf\">transforms.conf<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;xml_mssql_authentication_success]\nCLEAN_KEYS = 0\nFORMAT = user::$2 src::$4 action::success app::\"mssql\"\nREGEX = &lt;EventID Qualifiers='\\d+'&gt;(18453|18454|18455)&lt;\\\/EventID&gt;.*?&lt;EventData&gt;&lt;Data&gt;(.*?)&lt;\\\/Data&gt;&lt;Data&gt; \\&#91;CLIENT: (&amp;lt;)?(.*?)(&amp;gt;)?]&lt;\\\/Data&gt;&lt;Binary&gt;\nSOURCE_KEY = _raw\n\n&#91;xml_mssql_authentication_failure]\nCLEAN_KEYS = 0\nFORMAT = user::$2 signature::$3 src::$5 action::failure app::\"mssql\"\nREGEX = &lt;EventID Qualifiers='\\d+'&gt;(18456)&lt;\\\/EventID&gt;.*?&lt;EventData&gt;&lt;Data&gt;(.*?)&lt;\\\/Data&gt;&lt;Data&gt;(.*?)&lt;\\\/Data&gt;&lt;Data&gt; \\&#91;CLIENT: (&amp;lt;)?(.*?)(&amp;gt;)?]&lt;\\\/Data&gt;&lt;Binary&gt;\nSOURCE_KEY = _raw\n\n&#91;mssql_authentication_success]\nCLEAN_KEYS = 0\nFORMAT = user_domain::$user_domain user::$user client::$client action::\"success\" app::\"mssql\"\nREGEX = Login succeeded for user '((?&lt;user_domain&gt;&#91;^\\\\]*)\\\\)?(?&lt;user&gt;&#91;^']*)'.*\\&#91;CLIENT:\\s(?&lt;client&gt;.*)\\]\n\n&#91;mssql_authentication_failure]\nCLEAN_KEYS = 0\nFORMAT = user_domain::$user_domain user::$user client::$client action::\"failure\" app::\"mssql\"\nREGEX = Login failed for user '((?&lt;user_domain&gt;&#91;^\\\\]*)\\\\)?(?&lt;user&gt;&#91;^']*)'.*\\&#91;CLIENT:\\s(?&lt;client&gt;.*)\\]\n\n&#91;instance_for_mssql_authentication]\nCLEAN_KEYS = 0\nFORMAT = instance::$1\nREGEX = (?m)SourceName=(.*)&#91;\\r\\n]*EventCode=(18453|18454|18455|18456)<\/code><\/pre>\n<\/div><\/div>\n\n\n\n<p>We have another post discussing MySQL authentication logging, feel free to read it <a href=\"https:\/\/cybersecthreat.com\/zh\/2021\/12\/09\/mysql-community-edition-audit-logging\/\">\u7db2\u5740<\/a>.<\/p>\n\n\n\n<p>Reference material: <a href=\"https:\/\/www.eventtracker.com\/EventTracker\/media\/EventTracker\/Files\/support-docs\/Integration-Guide-Microsoft-SQL-Server.pdf\">https:\/\/www.eventtracker.com\/EventTracker\/media\/EventTracker\/Files\/support-docs\/Integration-Guide-Microsoft-SQL-Server.pdf<\/a><\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Some MSSQL instance by default using &#8220;Network Service&#8221; to start MSSQL service. It will automatically generate both successful and failure logon from this account. It is advise not to explicit grant database permission to this service account, and monitoring other privilege account with database access. <\/p>","protected":false},"author":2,"featured_media":370,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_uf_show_specific_survey":0,"_uf_disable_surveys":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[37,23],"tags":[35,54,34,36,20],"class_list":["post-142","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-privileged-account-monitoring","category-splunk","tag-authentication","tag-event-log","tag-mssql","tag-privileged-account-monitoring","tag-splunk"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Monitor MSSQL authentication with Splunk - CyberSecThreat<\/title>\n<meta name=\"description\" content=\"In this section, we will move on and discuss the second part, which is Monitoring MSSQL authentication with Splunk. As of this writing, neither\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cybersecthreat.com\/zh\/2020\/07\/08\/enable-mssql-authentication-log-to-eventlog\/\" \/>\n<meta property=\"og:locale\" content=\"zh_TW\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Monitor MSSQL authentication with Splunk\" \/>\n<meta property=\"og:description\" content=\"Some MSSQL instance by default using &quot;Network Service&quot; to start MSSQL service. It will automatically generate both successful and failure logon from this account. 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