Digital Forensic Survival Podcast

Latest Episodes:

DFSP # 409 - Regsvcs and Regasm Abuse Dec 19, 2023

Show notes

This week I’m talking about Regsvcs /Regasm exploitation, which is a Windows tactic attackers use to evade defense mechanisms and execute code. Specifically, this technique can be used to bypass process whitelisting and digital certificate validation. I'll break down some interpretation methods that may be used to identify such exploitation....

DFSP # 408 - Nesting Dec 12, 2023

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This week I’m talking about Nested Groups and the risk they pose for security. Built-in to the functionality of Active Directory is the ability to attach a group to another group. While this has advantages for account administration across an organization, it also offers attackers opportunity if certain precautions are not taken. This week I’ll break down Nested Groups in DFIR terms, talk about how attackers take advantage of it and what analysts need to know for investigations.

DFSP # 407 - More About Lateral Movement and Kerberos Dec 05, 2023

Show notes

This week it's more about lateral movement and kerberos events.

DFSP # 406 - All the BIN Directories Nov 28, 2023

Show notes

In a typical Linux "bin" directory, you can find various types of executable files and scripts that are used to perform different tasks. The confusing part is that there are a number of different BIN directories throughout the file system. What is the purpose and difference between these BIN directories? What do you need to know about them for forensic investigations? The answers to those questions and more are coming up...

DFSP # 405 - Werfault Attacks Nov 21, 2023

Show notes

Werfault is in interesting artifact in that there is not a lot of documentation on it but yet it may affect an investigation in different ways. Its appearance in logs sometimes adds a bit of confusion to an investigation because it could mean different things. Add to that a layer of apparent obscurity as to exactly how to interpret the information makes it even more difficult for newer examiners. I took on the question...

DFSP # 404 - Certutil Attacks Nov 14, 2023

Show notes

Certutil, a powerful command-line utility, possesses the potential for misuse by malicious actors to establish illicit network connections. Therefore, it is crucial to familiarize oneself with its legitimate applications and recognize common indicators of misuse. In this episode, we will delve into the utility of Certutil and identify effective methods to promptly detect and address potential abuses. Stay tuned as we explore these topics in depth...

DFSP # 403 - Lateral Movement Kerberos Auth Events Nov 07, 2023

Show notes

This week I'm going to cover an important Windows event that provides valuable information about authentication attempts and potential security breaches. The event may be used to identify compromised accounts, identify brute, force, attacks, or password spraying attacks. It may also be used to detect attack or probing activities. The artifact breakdown and triage methodology is coming up….

DFSP # 402 - Linux Root Directory Files for DFIR Oct 31, 2023

Show notes

In Linux and Unix-based operating systems, the "root" account is the superuser or administrator account with the highest level of privileges. It has complete control over the system and can perform any action, including modifying system files, installing software, and managing user accounts. The root account is sometimes referred to as the "root user" or simply “root"....

DFSP # 401 - INF Fetch Execute Oct 24, 2023

Show notes

This week we are taking a bit of a deep dive into an advanced attack technique to accomplish remote execution called “fetch and execute.” While there are different methods to accomplish the sort of thing what I am going to be focusing on is exploitation using a common Windows executable and installation file. Think of this as one of the touted “living off the land” attack techniques. It has value for compromise assessment methods as well as for threat hunting strategies...

DFSP # 400 - CMSTP Oct 17, 2023

Show notes

This week I am going to focus on a specific remote execution technique that you may see in the wild. Remote execution is important for incident response investigations but also for file use and knowledge investigations, particularly those that conducted due diligence exams for evidence of malware. I have covered remote execution in the past from different angles and I have done so because it is one of the red flags that an analyst should be looking for. In order to be effective in recognizing either an actual malicious execution or the risk of an attempted remote execution you must be reversed in the clever ways attackers attempt to compromise a host using Microsoft applications. The highlight this week will be CMSTP.exe abuse...

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