Phishing and ransomware. Ransomware and phishing. The two are inextricably connected and are now often chained together as the most potent exploit tools in a cybercriminal’s arsenal.

A ransomware attack is a bug that we can’t shake off. Or perhaps, it can even be called a shape-shifter that somehow finds a way into networks, no matter how many armed sentries you’ve deployed in and around your perimeter. The line between ransomware and a data breach is slowly fading. Threat actors prefer ransomware over other modes of attack because they work.

As a security analyst on Elastic’s InfoSec team, a common scenario we see is users coming to our team and asking: “Is this file safe to open?” Or one user reports a phishing email with an attachment that they didn’t open, but we see from the logs that 10 other users also received that email but didn’t report it and no alerts went off on their systems.

Adrozek is a malicious browser modifier that, when installed on users’ machines, infects them with adware. This particular strain of malware has been making rounds since May 2020; according to Microsoft, it was at its peak in August, when as many as 30,000 computers were affected per day. Although classified as adware, Adrozek is also designed to collect information extracted from browsers by modifying browser settings and extensions.

It is with great excitement that we announce our first-ever supervised ML and security integration! Today, we are releasing a supervised ML solution package to detect domain generation algorithm (DGA) activity in your network data. In addition to a fully trained detection model, our release contains ingest pipeline configurations, anomaly detection jobs, and detection rules that will make your journey from setup to DGA detection smooth and easy.

TL;DR: This blog contains some immediate guidance on using Splunk Core and Splunk Enterprise Security to protect (and detect activity on) your network from the Sunburst Backdoor malware delivered via SolarWinds Orion software. Splunk’s threat research team will release more guidance in the coming week. Also please note that you may see some malicious network activity but it may not mean your network is compromised. As always review carefully.

Universal Health Services (UHS), a Fortune 500 company and healthcare services provider, has reportedly shut down systems at facilities throughout the United States after the Ryuk ransomware hit its network on September 27, according to an article on the Health IT Security website. What is Ryuk ransomware? Ryuk is a sophisticated ransomware threat that targets businesses, hospitals, and government institutions across the world.