In our previous publication, we detailed our internal artifact-scanning service that continuously monitors packages from multiple sources to detect malicious packages and supply chain attacks. While this automated scanning capability has proven invaluable for threat...
Yesterday we published a short write-up about the malicious VS Code extension posing as “Material Icon Theme”. That post covered the discovery, the extension’s release timeline, and the fact that version 5.29.1 shipped with two Rust implants. This follow-up focuses on...
The recently exploited SharePoint vulnerability chain known as ToolShell (CVE-2025-53770) has shown once again that patching alone isn't enough. Attackers gained unauthenticated remote access to vulnerable on-premises SharePoint servers, planted web shells, and...
We’ve released a CLI utility that converts THOR logs into a Timesketch-compatible format. This allows analysts to import and visualize THOR’s forensic findings as timestamped events on a unified timeline, together with data from other sources. The thor2ts utility...
In this analysis, we will delve into the technical details of Katz Stealer, a credential-stealing malware as a service. We will explore its infection chain and the various techniques it employs to evade detection and exfiltrate sensitive data. We will also discuss...
Obfuscation is a technique widely used by cybercriminals, Advanced Persistent Threat (APT) groups, and even red-teaming operations. APTs, in particular, rely on obfuscation to remain undetected within networks for extended periods. However, modern malware, ransomware,...
Security strategies often assume that systems can be patched, upgraded, or replaced. In reality, many critical environments operate on legacy platforms where these options are impractical. Industrial control networks, healthcare systems, and government infrastructure...
Many organizations make a critical mistake when responding to actively exploited zero-day vulnerabilities: they patch but don’t investigate. Think about it this way: If your front door was left wide open for weeks, would you just lock it and walk away? If attackers...
Introduction Lynx ransomware is a newly emerged and sophisticated malware threat that has been active since mid-2024. Lynx ransomware has claimed over 20 victims across a range of industries. Once it infiltrates a system, it encrypts critical files, appending a...
Understanding the importance of web shell detection is crucial in today’s cybersecurity landscape. Traditional antivirus solutions often fall short, but specialized tools like Nextron’s THOR APT scanner provide advanced protection against these stealthy threats, ensuring comprehensive security.
Back in January 2023 Group-IB first reported and documented the TTPs of DarkPink, an APT group that targets the Asia-Pacific regions. We’ve been monitoring KamiKakaBot samples since September of last year. And at the start of this year in January we’ve noticed 2 new...
Every month the Nextron Threat Research Team (NTRT) shares insights into evasive threats that we’ve seen in the wild via our Valhalla service. The aim is to highlight interesting samples our rules detected and have or had very low detection rates as reported by...
In this article, we will explore the FalseFont Backdoor used by Peach Sandstorm APT to target defense contractors worldwide. The backdoor was initially identified and reported on by Microsoft. The malware features data exfiltration and remote access capabilities. It...