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Federation, put simply, extends authentication from one system (or organization) to another. Gerald Steere (@Darkpawh) and I spoke about cloud security at DEF CON in July 2017. Presentation slides and video are here: \"Hacking the Cloud\" One of the key ...","author":{"@type":"Person","name":"Sean Metcalf"}}</script> <style type="text/css">.recentcomments a{display:inline !important;padding:0 !important;margin:0 !important;}</style><meta property="og:type" content="article" /> <meta property="og:title" content="Securing Microsoft Active Directory Federation Server (ADFS)" /> <meta property="og:url" content="https://adsecurity.org/?p=3782" /> <meta property="og:site_name" content="Active Directory Security" /> <meta property="og:description" content="Many organizations are moving to the cloud and this often requires some level of federation. Federation, put simply, extends authentication from one system (or organization) to another. Gerald Steere (@Darkpawh) and I spoke about cloud security at DEF CON in July 2017. Presentation slides and video are here: "Hacking the Cloud" One of the key ..." /> <meta property="og:updated_time" content="2017-11-28T23:15:18+00:00" /> <meta property="article:modified_time" content="2017-11-28T23:15:18+00:00" /> <meta property="article:published_time" content="2017-11-24T18:59:01+00:00" /> </head> <body class="post-template-default single single-post postid-3782 single-format-standard custom-background wp-embed-responsive layout-boxed two_col_left two-columns singular"> <div class="container boxed-wrapper"> <div id="top-bar" class="row clearfix top-bar "> <div class="col-md-12 top-bar-items"> <ul class="social-profiles"> <li class="social-profile social-profile-rss"> <a href="https://adsecurity.org/?feed=rss2" title="Subscribe to Tech, News, and Other Ideations's RSS feed" id="social-id-1" class="mysocial social-rss"> <i class="fa fa-rss"></i> </a> </li> </ul> <button type="button" class="search-toggle navbar-toggle collapsed" data-toggle="collapse" 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rel="prev">Gathering AD Data with the Active Directory PowerShell Module</a></p> <p class="next-post col-sm-6"><a href="https://adsecurity.org/?p=3592" rel="next">Attacking Read-Only Domain Controllers (RODCs) to Own Active Directory</a> <i class="fa fa-arrow-circle-right"></i></p> </div> <div id="post-3782" class="clearfix post post-3782 type-post status-publish format-standard hentry category-cloud-security category-microsoft-security category-security-recommendation category-technical-reading category-technical-reference tag-adfs-certificates tag-adfs-recommendations tag-adfs-security tag-adfs-security-best-practices tag-goldensaml tag-goldensaml-detection tag-goldensaml-protection tag-microsoft-active-directory-federation-servers tag-protecting-adfs tag-securing-adfs item-wrap"> <div class="entry clearfix"> <div class="post-date date alpha with-year"> <p class="default_date"> <span class="month">Nov</span> <span class="day">24</span> <span class="year">2017</span> </p> </div> <h1 class="post-title entry-title"> Securing Microsoft Active Directory Federation Server (ADFS) </h1> <ul class="post-meta entry-meta clearfix"> <li class="byline"> By <span class="author"><a href="https://adsecurity.org/?author=2" rel="author">Sean Metcalf</a></span><span class="entry-cat"> in <span class="terms"><a class="term term-category term-431" href="https://adsecurity.org/?cat=431">Cloud Security</a>, <a class="term term-category term-11" href="https://adsecurity.org/?cat=11">Microsoft Security</a>, <a class="term term-category term-1045" href="https://adsecurity.org/?cat=1045">Security Recommendation</a>, <a class="term term-category term-4" href="https://adsecurity.org/?cat=4">Technical Reading</a>, <a class="term term-category term-2" href="https://adsecurity.org/?cat=2">Technical Reference</a></span></span> </li> </ul> <div class="entry-content clearfix"> <p>Many organizations are moving to the cloud and this often requires some level of federation. Federation, put simply, extends authentication from one system (or organization) to another.</p> <p>Gerald Steere (<a href="https://twitter.com/darkpawH">@Darkpawh</a>) and I spoke about cloud security at <a href="https://www.youtube.com/watch?v=LufXEPTlPak">DEF CON in July 2017</a>.<br /> Presentation slides and video are here: “<a href="https://trimarcsecurity.com/presentations">Hacking the Cloud</a>”</p> <p>One of the key items we covered was protecting Federation Servers, specifically聽 Microsoft Active Directory Federation Servers (ADFS).</p> <p>Microsoft is currently updating <a href="https://docs.microsoft.com/en-us/windows-server/identity/ad-fs/deployment/best-practices-securing-ad-fs">guidance for securing ADFS</a>.<br /> This post describes key ADFS concepts and a short-list of security recommendations on how to properly protect ADFS.</p> <h3>Federation Overview</h3> <p>The federation server typically lives on the internal network with a proxy server in the DMZ. There are certificates installed on the Federation server.</p> <p>ADFS uses the following certificates:</p> <ul> <li>Service communication</li> <li>Token-decrypting</li> <li>Token-signing</li> </ul> <p>ADFS terminology also includes:</p> <ul> <li>Relying party trusts: cloud services and applications</li> <li>Claim rules: determine what type of access and from where access is allowed.</li> </ul> <p><span style="text-decoration: underline;">Key Federation Points:</span></p> <ul> <li>Federation: trust between organizations leveraging PKI (certificates matter)</li> <li>Cloud SSO often leverages temporary or persistent browser cookies (cookies provide access)</li> <li>Several protocols may be supported, though typically SAML. (protocols and versions matter)</li> <li>Federation server (or proxy) is on public internet via port 443 (HTTPS).</li> </ul> <p><strong>Conceptual federation authentication flow</strong><span id="more-3782"></span></p> <p><img fetchpriority="high" decoding="async" class="alignnone wp-image-442" src="https://trimarcsecurity.com/wp-content/uploads/2017/11/Federation-Authentication-Flow-300x244.png" alt="" width="532" height="433" /></p> <p>In the above graphic:</p> <ul> <li>The user goes to website: web.sith.co and clicks Logon.</li> <li>The user鈥檚 browser recognizes federation config and ping the web app鈥檚 federation logon page.</li> <li>The user gets bounced to the registered federation server in the organization which either requests authentication, or uses existing user auth (AD Kerberos, etc). User may be prompted for multifactor authentication.</li> <li>The federation server provides the user with a token for the web app to which the user wants to connect.</li> <li>The user goes back to the web app鈥檚 authentication page and since the user has a token, the user is allowed access based on claims in the token.</li> </ul> <p> </p> <p><span style="text-decoration: underline;">Key Federation Authentication Items:</span></p> <ul> <li>Federation is effectively a Cloud version of Kerberos (though there are key differences).</li> <li>Own the Federation server, own organizational cloud services.</li> <li>Token & Signing certificates are very similar to the KRBTGT account since they are both used to sign tokens proving authentication (think <a href="https://adsecurity.org/?p=1640">Golden Tickets</a>).</li> <li>Steal federation certificates to forge/spoof access tokens.</li> </ul> <p>Underscoring the point Gerald & I made at DEFCON in 2017, <a href="https://www.cyberark.com/threat-research-blog/golden-saml-newly-discovered-attack-technique-forges-authentication-cloud-apps/">CyberArk released “GoldenSAML”</a> tools enabling someone with the federation server signing certificate to forge SAML tokens saying they are any user they wish. This capability means that Federation servers need to be protected at the highest level, along with Domain Controllers.</p> <p>Note that while the CyberArk post states that GoldenSAML is “newly discovered”, this is incorrect. Anyone who has worked with Federation understands that ownership of the federation certificates means control of the authentication, much like ownership of PKI CA certificates enables creation of PKI certificates.</p> <p><a href="https://twitter.com/darkpawH/status/933087703251304448">Gerald Steere provides some defensive advice</a>:<br /> “It is hard to defend against federation attacks, but if you compare logs from both sides, finding something unusual is a dead give away. Comparing issuance of tokens from the identity provider against logins to your cloud services for example”</p> <p> </p> <h3>Protecting ADFS Servers</h3> <p>This all means that federation servers, including ADFS servers, need to be protected at the same level of Domain Controllers (Tier 0).</p> <p><span style="text-decoration: underline;">Securing ADFS Recommendations:</span></p> <ul> <li>Only Active Directory Admins and ADFS Admins have admin rights to the ADFS system.</li> <li>Reduce local Administrators group membership on all ADFS servers.</li> <li>All cloud admins use Multi-Factor Authentication (MFA).</li> <li>Minimal administration capability via agents.</li> <li>Limit access on-network via host firewall.</li> <li>Ensure ADFS Admins use Admin Workstations to protect their credentials.</li> <li>Place ADFS server computer objects in a top-level OU that doesn’t also host other servers.</li> <li>All GPOs that apply to ADFS servers should only apply to them and not other servers as well. This limits potential privilege escalation through GPO modification.</li> <li>Ensure the installed certificates are protected against theft (don’t store these on a share on the network) and set a calendar reminder to ensure they get renewed before expiring (expired certificate breaks federation auth).</li> <li>Set logging to the highest level and send the ADFS (& security) logs to a SIEM to correlate with AD authentication as well as AzureAD (or similar).</li> <li><a href="https://adsecurity.org/?p=3299">Remove unnecessary protocols & Windows features</a></li> <li>Use a long (>25 characters), complex password for the ADFS service account. A <a href="https://msdn.microsoft.com/en-us/library/azure/dn528860.aspx">Group-Managed Service Account</a> is ideal since AD will manage the account password automatically.</li> <li>Update to the latest ADFS version for security and logging improvements (as always, test first).</li> </ul> <p><span style="text-decoration: underline;">Some useful PowerShell commands for documenting ADFS configuration:</span></p> <p>Identify Administrators</p> <pre><em># Adapted from https://powershell.org/2013/04/02/get-local-admin-group-members-in-a-new-old-way-3/ $Members = @()</em> <em>#Invoke-Command {</em> <em>$Members += net localgroup administrators | where {$_ -AND $_ -notmatch "command completed successfully"} | select -skip 4</em> <em>$LocalAdmins = New-Object PSObject -Property @{</em> <em> Computername = $env:COMPUTERNAME</em> <em> Group = "Administrators"</em> <em> Members = $Members</em> <em> } $LocalAdmins </em></pre> <p>On the ADFS server, there are ADFS PowerShell cmdlets. We can identify what they are by running the following command:</p> <pre><em>Get-Command -module ADFS</em></pre> <p>The ones I find most useful are:</p> <ul> <li><a href="https://technet.microsoft.com/en-us/library/ee892315.aspx?f=255&MSPPError=-2147217396">Get-ADFSCertificate</a> <ul> <li>The Get-ADFSCertificate cmdlet retrieves the certificates that the Federation Service uses for token signing, token decrypting and securing service communications. Keep an eye on expiration dates.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/dn479405(v=wps.630).aspx">Get-AdfsAdditionalAuthenticationRule</a> <ul> <li>The Get-AdfsAdditionalAuthenticationRule cmdlet retrieves the global rules that govern all applications that trigger additional authentication providers to be invoked. When the claim engine evaluates the additional authentication rules and determines that multiple factor authentication is required, the user is prompted to perform additional authentication. Use this rule only when all your applications are capable of performing web based credential collection through Active Directory Federation Services (AD FS). Applications that use protocols like WS-Trust will fail to obtain a security token if the trigger is true as a result of evaluation of the rules.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/ee892331.aspx">Get-AdfsAttributeStore</a> <ul> <li>The Get-ADFSAttributeStore cmdlet retrieves the attribute stores of the Federation Service. You can use this cmdlet with no parameters to retrieve all the attribute stores of the Federation Service.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/dn479378(v=wps.630).aspx">Get-AdfsAuthenticationProvider</a> <ul> <li>The Get-AdfsAuthenticationProvider cmdlet gets a list of all authentication providers currently registered in Active Directory Federation Services (AD FS). The read-only list includes built-in and external authentication providers and associated properties.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/ee892361.aspx">Get-AdfsClaimDescription</a> <ul> <li>The Get-ADFSClaimDescription cmdlet retrieves the claim descriptions that are in the Federation Service. Claim descriptions describe the claims that the Federation Service uses. They also describe how these claims are published in federation metadata. You can use this cmdlet without parameters to get the full list of claim descriptions.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/ee892320.aspx">Get-AdfsClaimsProviderTrust</a> <ul> <li>The Get-ADFSClaimsProviderTrust cmdlet retrieves the claims provider trusts in the Federation Service. You can use this cmdlet with no parameters to get all the claims provider trust objects.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/dn479372(v=wps.630).aspx">Get-AdfsClient</a> <ul> <li>The Get-AdfsClient cmdlet retrieves registration information for an OAuth 2.0 client that was previously registered with Active Directory Federation Services (AD FS).</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/ee892365.aspx">Get-AdfsEndpoint</a> <ul> <li>The Get-ADFSEndpoint cmdlet retrieves a specified endpoint from the Federation Service. The collection of ADFSEndpoint objects is a list of all the supported endpoints that are on the server. You can use this list to view the configuration of endpoints and enable or disable them. To see the full list of endpoints, use this cmdlet with no parameters.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/dn479367%28v=wps.630%29.aspx?f=255&MSPPError=-2147217396">Get-AdfsGlobalAuthenticationPolicy</a> <ul> <li>The Get-AdfsGlobalAuthenticationPolicy cmdlet displays the global authentication policy, which includes the providers currently allowed as additional providers in the AdditionalAuthenticationProvider property.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/dn479410(v=wps.630).aspx">Get-AdfsGlobalWebContent</a> <ul> <li>The Get-AdfsGlobalWebContent cmdlet gets all global web content objects or the global web content object that corresponds to the locale that you specify. If you do not specify the Locale parameter, the cmdlet gets global web content objects for all locales.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/ee892323.aspx">Get-AdfsProperties</a> <ul> <li>The Get-ADFSProperties cmdlet retrieves the properties of the Federation Service.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/ee892326.aspx">Get-AdfsRelyingPartyTrust</a> <ul> <li>The Get-ADFSRelyingPartyTrust cmdlet retrieves the relying party trusts in the Federation Service. You can use this cmdlet with no parameters to get all relying party trust objects.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/dn479392(v=wps.630).aspx">Get-AdfsSslCertificate</a> <ul> <li>The Get-AdfsSslCertificate cmdlet gets the host name, port, and certificate hash for all SSL bindings configured for Active Directory Federation Services (AD FS) and, if enabled, the device registration service.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/ee892337.aspx">Get-AdfsSyncProperties</a> <ul> <li>The Get-ADFSSyncProperties cmdlet retrieves the configuration database synchronization properties of the Federation Service.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/dn479313(v=wps.630).aspx">Get-AdfsWebApplicationProxyRelyingPartyTrust</a> <ul> <li>The Get-AdfsWebApplicationProxyRelyingPartyTrust cmdlet gets the Web Application Proxy relying party trust object for the proxy.<br /> The Web Application Proxy relying party trust is useful to manage global network access from outside the corporate network. By setting authentication and authorization policies, an administrator can restrict access to internal web applications and services that are published through the Web Application Proxy.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/dn479336(v=wps.630).aspx">Get-AdfsWebConfig</a> <ul> <li>The Get-AdfsWebConfig cmdlet gets Active Directory Federation Services (AD FS) web customization configuration settings.</li> </ul> </li> <li><a href="https://technet.microsoft.com/en-us/library/dn479358(v=wps.630).aspx">Get-AdfsWebTheme</a> <ul> <li>The Get-AdfsWebTheme cmdlet gets AdfsWebTheme objects. Specify a web theme by name. If you do not specify a name, the cmdlet gets all the AdfsWebTheme objects.</li> </ul> </li> </ul> <p>Here are a few ADFS PowerShell commands we use to check for certain configurations:</p> <pre># Ensure lockout threshold < AD lockout Get-AdfsProperties | fl ExtranetLockoutEnabled,ExtranetLockoutthreshold,ExtranetObservationWindow # Set to >1 years Get-ADFSProperties | Select CertificateDuration Write-Output "ADFS Server Logging Level:" (Get-AdfsProperties).LogLevel</pre> <p> </p> <h3>ADFS References</h3> <ul> <li>Active Directory Federation Services (MSDN)<br /> <a href="https://msdn.microsoft.com/en-us/library/bb897402.aspx?f=255&MSPPError=-2147217396">https://msdn.microsoft.com/en-us/library/bb897402.aspx?f=255&MSPPError=-2147217396聽</a></li> <li>Active Directory Federation Services<br /> <a href="https://docs.microsoft.com/en-us/windows-server/identity/active-directory-federation-services">https://docs.microsoft.com/en-us/windows-server/identity/active-directory-federation-services</a></li> <li>Overview of AD FS<br /> <a href="https://technet.microsoft.com/en-us/library/cc755226(v=ws.11).aspx">https://technet.microsoft.com/en-us/library/cc755226(v=ws.11).aspx</a></li> <li>AWS and ADFS<br /> <a href="https://aws.amazon.com/blogs/security/tag/ad-fs/">https://aws.amazon.com/blogs/security/tag/ad-fs/</a></li> <li>Best Practices for Secure Planning and Deployment of AD FS<br /> <a href="https://docs.microsoft.com/en-us/windows-server/identity/ad-fs/design/best-practices-for-secure-planning-and-deployment-of-ad-fs">https://docs.microsoft.com/en-us/windows-server/identity/ad-fs/design/best-practices-for-secure-planning-and-deployment-of-ad-fs</a></li> <li>ADFS Certificates Best Practices (DirTeam)<br /> <a href="https://dirteam.com/sander/series/ad-fs-certificates-best-practices/">https://dirteam.com/sander/series/ad-fs-certificates-best-practices/</a></li> <li>ADFS 3.0 Best Practices (FlamingKeys)<br /> <a href="https://flamingkeys.com/ad-fs-3-best-practices/">https://flamingkeys.com/ad-fs-3-best-practices/</a></li> <li>AD FS for Windows Server 2016 Best Practices (FlamingKeys)<br /> <a href="https://flamingkeys.com/ad-fs-windows-server-2016-best-practices/">https://flamingkeys.com/ad-fs-windows-server-2016-best-practices/</a></li> </ul> <div class="tptn_counter" id="tptn_counter_3782">(Visited 36,618 times, 1 visits today)</div> </div> <ul class="entry-footer"> <li class="post-tags col-sm-8"><i class="fa fa-tags" title="Tags"></i> <span class="terms"><a class="term term-tagpost_tag term-1278" href="https://adsecurity.org/?tag=adfs-certificates">ADFS certificates</a>, <a class="term term-tagpost_tag term-1283" href="https://adsecurity.org/?tag=adfs-recommendations">ADFS Recommendations</a>, <a class="term term-tagpost_tag term-1275" href="https://adsecurity.org/?tag=adfs-security">ADFS Security</a>, <a class="term term-tagpost_tag term-1276" href="https://adsecurity.org/?tag=adfs-security-best-practices">ADFS Security Best Practices</a>, <a class="term term-tagpost_tag term-1279" href="https://adsecurity.org/?tag=goldensaml">GoldenSAML</a>, <a class="term term-tagpost_tag term-1281" href="https://adsecurity.org/?tag=goldensaml-detection">GoldenSAML Detection</a>, <a class="term term-tagpost_tag term-1280" href="https://adsecurity.org/?tag=goldensaml-protection">GoldenSAML protection</a>, <a class="term term-tagpost_tag term-1274" href="https://adsecurity.org/?tag=microsoft-active-directory-federation-servers">Microsoft Active Directory Federation Servers</a>, <a class="term term-tagpost_tag term-1282" href="https://adsecurity.org/?tag=protecting-adfs">Protecting ADFS</a>, <a class="term term-tagpost_tag term-1277" href="https://adsecurity.org/?tag=securing-adfs">Securing ADFS</a></span></li> <li class="addthis col-sm-8"><div class="add-this"></div></li> </ul> </div> </div> <div class="entry-author"> <div class="row"> <div class="author-avatar col-sm-3"> <a href="https://adsecurity.org/?author=2" rel="author"> <img alt='' src='https://secure.gravatar.com/avatar/1f3ad5e878e5d0e6096c5a33718a04d0?s=200&d=mm&r=g' srcset='https://secure.gravatar.com/avatar/1f3ad5e878e5d0e6096c5a33718a04d0?s=400&d=mm&r=g 2x' class='avatar avatar-200 photo' height='200' width='200' decoding='async'/> </a> </div> <div class="author-bio col-sm-9"> <h3 class="section-title-sm">Sean Metcalf</h3> <p>I improve security for enterprises around the world working for TrimarcSecurity.com<br /> Read the About page (top left) for information about me. :)<br /> https://adsecurity.org/?page_id=8</p> <ul class="author-social"> <li><a href="mailto:sean@adsecurity.org"><i class="fa fa-envelope-o"></i></a></li> </ul> </div> </div> </div> <div id="comments" class="clearfix no-ping"> <h4 class="comments current"> <i class="fa fa-comments-o"></i> 2 comments </h4> <div class="comments-list-wrapper"> <ol class="clearfix comments-list" id="comments_list"> <li id="comment-13544" class="comment even thread-even depth-1 comment"> <div class="row"> <div class="comment-wrap col-md-12"> <ul class="comment-meta"> <li class="comment-avatar"><img alt='' src='https://secure.gravatar.com/avatar/dcdc65f3a1409202c8181b11a313fa53?s=50&d=mm&r=g' srcset='https://secure.gravatar.com/avatar/dcdc65f3a1409202c8181b11a313fa53?s=100&d=mm&r=g 2x' class='avatar avatar-50 photo' height='50' width='50' decoding='async'/></li> <li class="comment-attr"><span class="comment-author">Brad</span> on <span class="comment-date">November 28, 2017 <span class="time">at 5:02 pm</span></span></li> <li class="single-comment-link"><a href="https://adsecurity.org/?p=3782#comment-13544">#</a></li> </ul> <div class="comment-entry"> <p>Curious as to why you recommend extending the certificate duration from the default of 1 year all the way to 5 years. I mean, I guess if the token signing certificate is compromise it probably doesn’t make a practical difference if the access is 1 year or 5 years. Realistically it’d be great if relying parties used idp metadata to get the new certificate and rollovers could happen very frequently. Still, 5 years is a long time for any certificate to be valid without a really good reason.</p> </div> </div> </div> <ol class="children"> <li id="comment-13545" class="comment byuser comment-author-seanmetcalf bypostauthor odd alt depth-2 comment"> <div class="row"> <div class="comment-wrap col-md-12"> <ul class="comment-meta"> <li class="comment-avatar"><img alt='' src='https://secure.gravatar.com/avatar/1f3ad5e878e5d0e6096c5a33718a04d0?s=50&d=mm&r=g' srcset='https://secure.gravatar.com/avatar/1f3ad5e878e5d0e6096c5a33718a04d0?s=100&d=mm&r=g 2x' class='avatar avatar-50 photo' height='50' width='50' loading='lazy' decoding='async'/></li> <li class="comment-attr"><span class="comment-author"><a href="https://ADSecurity.org" rel="external">Sean Metcalf</a></span> on <span class="comment-date">November 28, 2017 <span class="time">at 8:38 pm</span></span><br /><span class="label label-primary author-cred">Author</span></li> <li class="single-comment-link"><a href="https://adsecurity.org/?p=3782#comment-13545">#</a></li> </ul> <div class="comment-entry"> <p>Agreed. 1 year is probably too short. We just use this as a check to see that the certificate will be available for a while. 5 years may be too long, but better than expiring.<br /> We’ll review this guidance. Thanks!</p> </div> </div> </div> </li> </ol> </li> </ol> </div> </div> <div id="respond"> <h3 id="reply-title"><i class="fa fa-comment-o"></i> Comments have been disabled.</h3> </div> </div> <div id="sidebar1" class="sidebar sidebar-right widget-area col-md-4"> <div id="recent-posts-4" class="sidebar-wrap widget_recent_entries"> <h3>Recent Posts</h3> <ul> <li> <a href="https://adsecurity.org/?p=4436">BSides Dublin – The Current State of Microsoft Identity Security: Common Security Issues and Misconfigurations – Sean Metcalf</a> </li> <li> <a href="https://adsecurity.org/?p=4434">DEFCON 2017: Transcript – Hacking the Cloud</a> </li> <li> <a href="https://adsecurity.org/?p=4432">Detecting the Elusive: Active Directory Threat Hunting</a> </li> <li> <a href="https://adsecurity.org/?p=4430">Detecting Kerberoasting Activity</a> </li> <li> <a href="https://adsecurity.org/?p=4428">Detecting Password Spraying with Security Event Auditing</a> </li> </ul> </div><div id="text-3" class="sidebar-wrap widget_text"><h3>Trimarc Active Directory Security Services</h3> <div class="textwidget">Have concerns about your Active Directory environment? 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