Compass Security Blog

Offensive Defense

Why You Should Implement a Banned Password List

The ntds.dit file from a domain controller contains all password hashes of the domain. In a company with employees around the globe we were allowed to analyze the hashes. Here are the results, and the reason why you should implement a banned password list.

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No Passwords More Problems

Passwordless products promise greater security and convenience by allowing users to log in to Windows systems with only their smartphone. But what is going on behind the scenes and how could a domain’s security stance be worsened by such a solution? In this post I will explain how these products are implemented and detail the vulnerabilities and weaknesses discovered in three tested products.

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BloodHound Inner Workings & Limitations – Part 3: Session Enumeration Through Remote Registry & Summary

BloodHound is the way to go to for finding attack paths in an Active Directory (AD) environment. However, it is not always clear how the data is gathered without looking at the code of SharpHound, the data ingestor for BloodHound. Microsoft hardened their systems over time through updates, which makes enumeration of Active Directory (AD) […]

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BloodHound Inner Workings & Limitations – Part 2: Session Enumeration Through NetWkstaUserEnum & NetSessionEnum

BloodHound is the way to go to for finding attack paths in an Active Directory (AD) environment. However, it is not always clear how the data is gathered without looking at the code of SharpHound, the data ingestor for BloodHound. Microsoft hardened their systems over time through updates, which makes enumeration of Active Directory (AD) […]

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BloodHound Inner Workings & Limitations – Part 1: User Rights Enumeration Through SAMR & GPOLocalGroup

BloodHound is the way to go to for finding attack paths in an Active Directory (AD) environment. However, it is not always clear how the data is gathered without looking at the code of SharpHound, the data ingestor for BloodHound. Microsoft hardened their systems over time through updates, which makes enumeration of Active Directory (AD) […]

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Weekly penetration tests for agile software – Does it work well?

Agile software development models have become the de-facto standard. They are taught at universities and implemented in practice as far as possible. Anyone who doesn’t develop software using agile processes is on the verge, and already tilting towards that. At least that is how it seems. Consequently, the question is not whether the integration of […]

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A Years Worth of Active Directory Privilege Escalation

The end of the year is a good time to sit back and reflect for a moment on the past year. So let us take a look at the ten most common ways how I got Domain Admin privileges in our Active Directory penetration tests in 2021.

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Relaying NTLM authentication over RPC again…

A little bit over a year ago, I wrote an article on this blog about CVE-2020-1113 and how it enabled to execute code on a remote machine through relaying NTLM authentication over RPC triggering a scheduled task on the remote system. History repeats itself and a vulnerability of the same category has been fixed by Microsoft in June this year.

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SAML Raider Release 1.4.0

SAML Raider 1.4.0 is out which contains several new features like UI changes, new text editor, raw mode, XSW match/replace, parameter name definition and attack templates for XXE and XSLT attacks.

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The Good Old DNS Rebinding

A post on how to trick browsers to work as a gateway to internal web servers and IoT devices, the concepts behind and how to easily exploit DNS rebinding using the Singularity of Origin framework.

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