How Your Team’s Culture Determines the Value of Your Tabletop Exercise

September 13, 2022

A tabletop exercise (TTX) measures more than an organization’s technical capabilities and adherence to an incident response plan—it facilitates the confluence of personalities and team cultures, in turn revealing friction not only in processes but also in team dynamics. The success of an organization’s response in both a TTX scenario and, more importantly, a real-world…

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Video Blog: Using DLL Persist to Avoid Detection

September 12, 2022

During an Incident Response case, the TrustedSec IR team came across a novel method used by an attacker to maintain access to the target’s servers. After gaining access to the systems, the attacker then modified a DLL required by a service to include malicious code. This video demonstrates a similar process for embedding malicious code…

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Detection and Alerting: Selecting a SIEM

September 2, 2022

Summary Basic SIEM requirements should be in place to create mature detections for a variety of log sources, including network logs, system logs, and application logs (including custom applications). This focuses on Security Operations and does not include the engineering side of SIEM management, e.g., licensing, hardware/cloud requirements, retention needs, etc. Each component of the…

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Splunk SPL Queries for Detecting gMSA Attacks

May 20, 2022

1    Introduction What is a group Managed Service Account (gMSA)? If your job is to break into networks, a gMSA can be a prime target for a path to escalate privileges, perform credential access, move laterally or even persist in a domain via a ‘golden’ opportunity. If you’re an enterprise defender, it’s something you need…

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CVE 2022-22965 (Spring4Shell) Vulnerability

April 1, 2022

On March 29, 2022, a security researcher with the handle p1n93r disclosed a Spring Framework remote code execution (RCE) vulnerability, which was archived by vx-underground. This vulnerability, known as Spring4Shell, affects applications that use JDK v9 or above that run Apache Tomcat as the Servlet Container in a WAR package and use dependencies of the…

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Simplifying Your Operational Threat Hunt Planning

March 30, 2022

Opening Hopefully you all were able to read our recent Threat Hunting whitepaper and had the chance to listen to our latest Threat Hunting webinar. These references should be used as the foundation of information, which leads us into the next journey: how to build out your first Threat Hunt. Building out an organization’s Threat…

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TrustedSec Okta Breach Recommendations

March 23, 2022

TrustedSec’s Incident Response Team sent urgent communications to all IR retainer clients after the discovery of the compromise of Okta. Below are the recommendations provided with additional updates after reviewing more information on 03/23/2022. On March 22, 2022, the threat group LAPSUS$ announced a successful compromise of Okta, a heavily used identity and access management…

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Back to Basics: The TrustedSec Guide to Strong Cyber Hygiene

March 9, 2022

Every day, new challenges, attacks, and vulnerabilities are publicized. Just as attackers and the threat landscape are constantly changing, adapting, and evolving, so too must the Blue Teams and defenders who protect organizations against these threats. While the old adage may have been that attacks are rare and unlikely to happen, a new mentality of…

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Real or Fake? Spoof-Proofing Email With SPF, DKIM, and DMARC

January 13, 2022

I briefly mentioned using DKIM to verify an email’s sender in a previous blog post that described the steps I took to determine whether a suspicious email was legitimate or a phishing attempt. In this post, we will take a deeper dive into how organizations can help stop email spoofing using a combination of three…

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Real or Fake? How to Spoof Email

January 11, 2022

I briefly mentioned how easy it is to forge email sender addresses in a previous blog post that described the steps I took to determine whether a suspicious email was legitimate or a phishing attempt. In this post, we will take a deeper dive into why email sender addresses are so easy to forge and…

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