At Elastic Security Labs, we uncovered PUMAKIT, a sophisticated multi-stage Linux malware with advanced rootkit capabilities. Initially identified through routine threat hunting on VirusTotal, PUMAKIT consists of a dropper (cron), two memory-resident executables, an LKM rootkit module, and a userland shared object (SO) …

At Elastic, we recognize the critical need for securing containerized applications in Kubernetes and cloud environments. To enhance runtime security, we’ve integrated Falco—an open-source cloud-native security tool—directly with Elastic Security. Falco leverages Linux kernel events and plugins to detect abnormal …

At Elastic Security Labs, we analyzed a critical set of vulnerabilities in the CUPS printing system, disclosed by security researcher Simone Margaritelli (@evilsocket) on September 26, 2024. These flaws, affecting CUPS versions ≤ 2.0.1, enable unauthenticated remote attackers to achieve remote code execution (RCE) via …

At Elastic Security Labs, we uncovered a sophisticated Linux malware campaign exploiting Apache2 servers since March 2024. Attackers used multiple malware families, including KAIJI (DDoS) and RUDEDEVIL (crypto miner), along with custom tools for persistence and control. They leveraged C2 channels disguised as kernel …

In this second part of the Linux Persistence Detection Engineering series, I explore the world of more advanced Linux persistence techniques. This part builds upon the knowledge obtained from the previous persistence blog dubbed "Linux Detection Engineering - A Primer on Persistence Mechanisms". This sequel …

In this first installment of the Linux Persistence Detection Engineering series, I delve into Linux persistence mechanisms, exploring both common and complex techniques to enhance the knowledge of defenders and security researchers. I examine how these persistence methods operate, how to set them up, and most …

In this article, I explore how to effectively use Auditd and Auditd Manager for detection engineering. I’ll demonstrate Auditd's powerful features, guide you through the setup process, and show you how to create and modify rules to capture specific behaviors. You'll also learn how to interpret the logs and discover how …

This research delves into large-scale malware analysis conducted by Elastic Security Labs, highlighting how Elastic ingest pipelines were used to filter out benign and duplicate data during dynamic malware analysis. By leveraging these pipelines, we efficiently managed vast datasets, enabling us to focus on identifying …

Today we will be taking a look at the medium box "Undetected" from Hack The Box. The foothold for the box can be found through a vulnerable php script in a directory that should not be world accessible. The script allows for remote code execution onto the box as the www-data user. We then escalate to user by …

Welcome to my Hack The Box walkthrough for the "Meta" box. The box is considered to be of medium difficulty. Meta requires you to perform DNS virtual host enumeration, identify the inner workings of an image upload functionality, and exploit this to get a foothold. We then find a vulnerable version of …