Security | Threat Detection | Cyberattacks | DevSecOps | Compliance

The Sumo Logic Threat Labs team previously outlined the risks associated with unprotected cloud credentials found on Windows endpoints. This article builds on that work by providing detection and hunting guidance in the context of endpoints that run the Linux operating system. Although workloads that support business functionality are increasingly moving to the cloud, these workloads are often managed through an endpoint that is often found on premises.

PAM360 is ManageEngine’s comprehensive privileged access management (PAM) solution designed for enterprises to protect sensitive, privileged identities from internal and external threats. With the principle of least privilege enshrined across the product, PAM360’s privilege elevation and delegation management (PEDM) capabilities help enterprises eliminate standing privileges and provide granular privileged access in a restricted, time-based manner.

NTFS is a filesystem developed by Microsoft that was introduced in 1993. Since then, it has become the primary filesystem for Windows. In recent years, the need for an NTFS implementation for macOS and Linux has risen, and as a result, new NTFS drivers for those operating systems have been developed. This blog post presents some information about the NTFS driver for Linux and shows a bug we found in one of the filesystem’s features.

KSMBD, as defined by the kernel documentation1, is a linux kernel server which implements SMB3 protocol in kernel space for sharing files over network. It was introduced in kernel version ‘v5.15-rc1’ so it’s still relatively new. Most distributions do not have KSMBD compiled into the kernel or enabled by default. Recently, another vulnerability (ZDI-22-16902) was discovered in KSMBD, which allowed for unauthenticated remote code execution in the kernel context.

If you've ever used Linux, you’ve probably heard about SELinux or Security-enhanced Linux. For a very long time, my interaction with it was just restricted to: Like many other security solutions, SELinux can sometimes be annoying, and understanding even the basic concepts can change our bigger enemy to our best friend.

Linux servers have been in use for specific uses for a long time. One ought to be conscious that a new Linux server’s degree of protection is exceptionally low by default configuration. This is in order to permit as much functionality and competency as feasible while installing it. Consequently, it’s essential to carry out fundamental hardening procedures prior to installing the server in a production environment.

In this post, I want to scratch at the surface of a very interesting technology that Elastic’s Universal Profiler and Security solution both use called eBPF and explain why it is a critically important technology for modern observability. I’ll talk a little bit about how it works and how it can be used to create powerful monitoring solutions — and dream up ways eBPF could be used in the future for observability use cases.