Blogs

Microsoft Workload Identities Leaked Credentials

Microsoft announced four new detections in Azure Active Directory Identity Protection last month. One of the four detections is “Workload Identities Leaked Credentials.” During a Microsoft webinar where I demonstrated this new feature in Microsoft Identity Protection, multiple people requested the tool I created, so I decided to release it. This blog post will briefly […]

Microsoft Defender for Office 365 Safe Links Bypass

In my previous blog post, I mentioned you need a URL shortener instead of the Azure Function URL to send to a mailbox to identify Microsoft Defender for Office 365 Safe Links. The reason to use a shortener is that using the direct Function App URL bypasses Microsoft Defender for Office 365 Safe Links active […]

Microsoft Defender for Office 365 Identification

A few months ago, I wrote a script that checks if a company uses Microsoft Defender for Identity. I then wondered if there is a way to identify if a company uses Microsoft Defender for Office 365. Safe Links, a Microsoft Defender for Office 365 feature, actively scans incoming URLs. So checking if Microsoft Defender […]

Microsoft Azure Subscription Hijacking

Suppose you have a pay-as-you-go subscription in Azure. In that case, you might need to review who owns the Global Administrator role or who has owner permissions on that subscription in your tenant as a malicious user or attacker can hijack the subscription and make high costs at your expense. Since all activity logs are […]

Microsoft Windows Antimalware Scan Interface Bypasses

Antimalware Scan Interface, or AMSI in short, is an interface standard for Windows components like User Account Control, PowerShell, Windows Script Host, Macro’s, Javascript, and VBScript to scan for malicious content. AMSI sits in the middle of an application and an AMSI provider, like Microsoft Defender, to identify malicious content. In this blog post, I […]

Microsoft Windows Print Spooler Elevation of Privilege vulnerability (CVE-2021-1675) explained

I guess most of you heard about the Windows Print Spooler Elevation of Privilege vulnerability (CVE-2021-1675) in the last couple of weeks. It is a vulnerability that gives an attacker high privileges when they own a regular user account on all print spooler service-enabled devices. Unfortunately, it runs on all Windows Operating Systems by default. […]

Microsoft JSON Web Token Extractor

When connecting to Azure using, for example, the PowerShell Az module, a JSON Web Token is created and sometimes stored in plain text on disk and memory. I will show where to find the JSON Web Tokens on disk in this blog post, including a tool I wrote to get JSON Web Tokens from memory […]

Microsoft Word Malware Example

Most malware creators are very creative. Hiding content, obfuscate malicious code, or trick people into clicking messages forcing the malware to run. This blog post will go through real-world Microsoft Word malware to show how nifty some malware can be. Malicious Word Document In this example, I will use a real-world example found on the […]

Microsoft Defender for Identity: AS-REP Roasting

Microsoft released a new detection for Microsoft Defender for Identity. The detection detects a malicious request for user accounts that do not require pre-authentication, also known as an AS-REP roasting attack. This blog post will briefly explain what an AS-REP roasting attack is and how to mitigate it. AS-REP roasting is not a new attack. […]

Microsoft Azure AD Conditional Access Validator

Conditional Access policies, at their simplest, are if-then statements. If a user wants to access a resource, they must complete an action. Conditional Access contains many settings, and they can complement each other. Conditional Access contains many settings, and they can complement each other. Misconfiguration can take place when having multiple Conditional Access policies, or […]

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