Recently, several projects, including Akijo’s and n00py’s work, have emerged that exploit misconfigurations of Microsoft’s Local Administrator Password Solution (LAPS) in Active Directory environments. This begs the question: how to make sure their LAPS implementation is secure? It’s a solution to manage passwords for privileged accounts. If this breaks, like cpassword values in Group Policy … Continue reading "HOWTO: Check your LAPS Implementation for Proper Security"
Over the past six months, I’ve shown you ways to get to know the devices that people in your organization use App Passwords on, set an alert to notify when an additional person is assigned the Azure AD Global Administrator role and set an alert to notify when an Azure AD emergency access account is … Continue reading "TODO: Stream additional logs from Azure AD for optimal visibility"
Recently, people responsible for identity, security and governance have embraced the vision of Zero Trust. It is the logical evolution of our thinking towards an actionable, more thorough and holistic approach to access, based on the mantra ‘trust no-one, verify everything’. Today, I'm sharing my early experiences in this field. The idea of Zero … Continue reading "Experiences with Zero Trust"
As part of MC224734, Microsoft has communicated publicly that they are requiring multi-factor authentication (MFA) from four more Azure AD privileged roles through the Security Defaults functionality. Organizations leveraging Conditional Access to require MFA from privileged accounts should take note. About Security Defaults Security Defaults is an Identity security feature. When enabled, it requires … Continue reading "TODO: Require MFA from four more Azure AD Roles through your Conditional Access Policies"
I get to investigate quite some mail environments in my work as a consultant. At a certain point you see some patterns emerging. One of those patterns is the correct configuration of mail related DNS records. It's one of the first things I check when I must check an unfamiliar environment. I have talked about … Continue reading "Easily list mail DNS records via this PowerShell script"
After being in Public Preview since February 2020, Microsoft made the Office 365 app in Azure AD Conditional Access Generally Available. The below image sums up what is in the Office 365 app: The Office 365 app helps with common challenges Microsoft 365 admins have: All the individual services in the Office 365 Suite are … Continue reading "Five things to know about the Office 365 app in Azure AD Conditional Access"
We’ve helped organizations embrace Microsoft’s Advanced Threat Analytics (ATA) solution to protect their Active Directory environments from attacks. On January 12th, 2021, mainstream support for this product ends. ATA version 1.9.3, released on September 14th, 2020 is the final update as part of mainstream support. It’s time to move on to Microsoft Defender for Identity. … Continue reading "Mainstream support for Microsoft Advanced Threat Analytics (ATA) ends in three months"
During a project with one of my customers, I was tasked to look at a non-delivery report (NDR) for a mail message. The bounce error was pretty confusing, but after reviewing the headers, we noticed that the DKIM check had failed. This was a bit of a surprise, because the message was sent from Microsoft … Continue reading "Field Notes: DKIM and missing selector records"
Workstations that are allowed to communicate to Domain Controllers pose a risk of lateral movement. To mitigate some of these risks, we can harden the Remote Desktop connections to Domain Controllers. Note: For organizations that have implemented the Active Directory administrative tier model, or are striving to embrace, their Privileged Access Workstations (PAWs) pose a … Continue reading "HOWTO: Harden Remote Desktop connections to Domain Controllers"
Embarrassing The Dutch Data Protection Agency (Dutch: Autoriteit Persoonsgegevens) is responsible for the supervision of correct handing of personal data. This agency must be informed when there is a breach with personal data. It’s the agency that has its duties described within GDPR. So, it is extra painful when they themselves are responsible of a … Continue reading "Quick tips to limit sending mail to the wrong recipient"