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Author: Jeff Warren

Jeff Warren is STEALTHbits’ Vice President of Product Management. Jeff has held multiple roles within the Product Management group since joining the organization in 2010, initially building STEALTHbits’ SharePoint management offerings before shifting focus to the organization’s Data Access Governance solution portfolio as a whole. Before joining STEALTHbits, Jeff was a Software Engineer at Wall Street Network, a solutions provider specializing in GIS software and custom SharePoint development. With deep knowledge and experience in technology, product and project management, Jeff and his teams are responsible for designing and delivering STEALTHbits’ high quality, innovative solutions. Jeff holds a Bachelor of Science degree in Information Systems from the University of Delaware.
Ways to Detect and Mitigate PowerShell Attacks
Ways to Detect and Mitigate PowerShell Attacks

Ways to Detect and Mitigate PowerShell Attacks

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Detect and Mitigate PowerShell Attacks PowerShell has grown as an attack platform against Windows systems as a way for attackers to “live off the land” and use tools that are natively available. We’ve already looked at Empire, DeathStar, and CrackMapExec and how those tools leverage PowerShell to invoke Mimikatz and initiate other attacks. In this post, we will explore what you can do to detect and protect against PowerShell attacks. What’s So Great about PowerShell? There are several reasons attackers…

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CrackMapExec with Mimikatz and PowerSploit to harvest credentials
Lateral Movement with CrackMapExec

Lateral Movement with CrackMapExec

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In the previous post, we explored how attackers can use Mimikatz to automatically escalate privileges to Domain Admins using Empire and DeathStar. In this post, I will take a look at another open-source tool that leverages Mimikatz to harvest credentials and move laterally through an Active Directory environment: CrackMapExec. Self-described as a “swiss army knife for pentesting networks”, CrackMapExec is a Python-based utility that is geared towards evaluating and exploiting weaknesses in Active Directory security. This approach involves gathering credentials…

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Mimikatz is one of the best tools to gather credential data from Windows systems
How Attackers are Stealing Your Credentials with Mimikatz

How Attackers are Stealing Your Credentials with Mimikatz

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Stealing Credentials with Mimikatz Mimikatz is an open-source tool built to gather and exploit Windows credentials. Since its introduction in 2011 by author Benjamin Delpy, the attacks that Mimikatz is capable of have continued to grow. Also, the ways in which Mimikatz can be packaged and deployed have become even more creative and difficult to detect by security professionals. This has led to Mimikatz recently being tied to some of the most prevalent cyber attacks such as the Petya ransomware….

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Skeleton Key malware targeted at Active Directory domains
Unlocking All the Doors to Active Directory with the Skeleton Key Attack

Unlocking All the Doors to Active Directory with the Skeleton Key Attack

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Introduction: Unlocking Active Directory with the Skeleton Key Attack There are several methods for compromising Active Directory accounts that attackers can use to elevate privileges and create persistence once they have established themselves in your domain. The Skeleton Key is a particularly scary piece of malware targeted at Active Directory domains to make it alarmingly easy to hijack any account. This malware injects itself into LSASS and creates a master password that will work for any account in the domain….

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Change user passwords and escalate privileges within Active Directory with Mimikatz commands SetNTLM and ChangeNTLM
Manipulating User Passwords with Mimikatz

Manipulating User Passwords with Mimikatz

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Introduction: Manipulating User Passwords with Mimikatz Mimikatz now supports the ability to manipulate user passwords with new commands: SetNTLM and ChangeNTLM. These commands give attackers a new way to change user passwords and escalate privileges within Active Directory. Let’s take a look at these NTLM commands and what they do. ChangeNTLM This performs a password change event. To use this command, you must know the old password in order to set a new one. One deviation is that this command…

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