Tag Archive: LSASS

Jan 01

Attack Methods for Gaining Domain Admin Rights in Active Directory

There are many ways an attacker can gain Domain Admin rights in Active Directory. This post is meant to describe some of the more popular ones in current use. The techniques described here “assume breach” where an attacker already has a foothold on an internal system and has gained domain user credentials (aka post-exploitation). The …

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Aug 13

Active Directory Security Risk #101: Kerberos Unconstrained Delegation (or How Compromise of a Single Server Can Compromise the Domain)

At Black Hat USA 2015 this summer (2015), I spoke about the danger in having Kerberos Unconstrained Delegation configured in the environment. When Active Directory was first released with Windows 2000 Server, Microsoft had to provide a simple mechanism to support scenarios where a user authenticates to a Web Server via Kerberos and needs to …

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May 11

Detecting Mimikatz Use

Benjamin Delpy published some YARA rules in detecting Mimikatz use in your environment. More information on Mimikatz capability is in the “Unofficial Mimikatz Guide & Command Reference” on this site. YARA is described as: YARA is a tool aimed at (but not limited to) helping malware researchers to identify and classify malware samples. With YARA …

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May 07

Windows 10 Microsoft Passport (aka Microsoft Next Generation Credential) In Detail

At the Microsoft Ignite conference this week, there are several sessions covering Windows 10 features. One of biggest changes in Windows 10 is the new credential management method and the related “Next Generation Credential”, now named Microsoft Passport. There hasn’t been much information on how the new credential system works, so I challenged myself to …

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Jan 19

Attackers Can Now Use Mimikatz to Implant Skeleton Key on Domain Controllers & BackDoor Your Active Directory Forest

Once an attacker has gained Domain Admin rights to your Active Directory environment, there are several methods for keeping privileged access. Skeleton Key is an ideal persistence method for the modern attacker. More information on Skeleton Key is in my earlier post. Note that the behavior documented in this post was observed in a lab …

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Jan 16

Active Directory Domain Controller Skeleton Key Malware & Mimikatz

Dell SecureWorks posted about the Skeleton Key malware discovered at a customer site. The Skeleton Key malware is installed on one or multiple Domain Controllers running a supported 64bit OS. The malware “patches” the security system enabling a new master password to be accepted for any domain user, including admins. This enables the attacker to …

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Sep 06

The Evolution of Protected Processes Part 1: Pass-the-Hash Mitigations in Windows 8.1

Pass-the-Hash has been around for years The post on Alex Ionescu’s blog, The Evolution of Protected Processes Part 1: Pass-the-Hash Mitigations in Windows 8.1, describes the latest mitigation techniques Microsoft is incorporating in the latest versions of Windows. He describes the importance of LSASS in his post: (emphasis/bold text is my own) The LSASS Process In …

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