Tag: HUNTING

This blog entry delves into MxDR’s unraveling of the AsyncRAT infection chain across multiple cases, shedding light on the misuse of aspnet_compiler.exe, a legitimate Microsoft process originally designed for precompiling ASP.NET web applications.

During our recent investigations, the Trend Micro Managed XDR (MxDR) team handled various cases involving AsyncRAT, a Remote Access Tool (RAT) with multiple capabilities, such as keylogging and remote desktop control, that make it a substantial threat to victims.…

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In the ever-evolving landscape of cybersecurity threats, one name that consistently surfaces as a force to be reckoned with is “PlugX.” This covert and insidious malware has left a trail of digital intrigue, combining advanced features with a knack for eluding detection. Its history is interwoven with cyber espionage, targeted attacks, and a continuous cat-and-mouse game with security experts (1)(2).…

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Cybereason issues Threat Alerts to inform customers of emerging impacting threats. The Cybereason Incident Response (IR) team documented such critical attack scenarios, which started from a GootLoader infection to ultimately deploy more capabilities. Cybereason Threat Alerts summarize these threats and provide practical recommendations for protecting against them.…

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By Securonix Threat Research: D.Iuzvyk, T.Peck, O.Kolesnikov

tl;dr

Threat actors working as part of DB#JAMMER attack campaigns are compromising exposed MSSQL databases using brute force attacks and appear to be well tooled and ready to deliver ransomware and Cobalt Strike payloads.

In an interesting attack campaign, the Securonix Threat Research team has identified threat actors targeting exposed Microsoft SQL (MSSQL) services using brute force attacks.…

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This post is a continuation of “Malware Unpacking With Hardware Breakpoints”.

Here we will be utilising Ghidra to locate the shellcode, analyse the decryption logic and obtain the final decrypted content using Cyberchef.

Locating the Shellcode Decryption Function In Ghidra

At the point where the hardware breakpoint was first triggered, the primary executable was likely in the middle of the decryption function.…

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Key FindingsCheck Point Research is actively tracking the evolution of SysJoker, a previously publicly unattributed multi-platform backdoor, which we asses was utilized by a Hamas-affiliated APT to target Israel. Among the most prominent changes is the shift to Rust language, which indicates the malware code was entirely rewritten, while still maintaining similar functionalities.…
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Table of Contents

During a recent hunt, Qualys Threat Research has come across a ransomware family known as Phobos, impersonating VX-Underground. Phobos ransomware has been knocking on our door since early 2019 and is often seen being distributed via stolen Remote Desktop Protocol (RDP) connections. Strongly believed to be closely tied to the preceding Dharma malware, Phobos usually operates as a Ransomware-as-a-Service (RaaS) threat model.…

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Microsoft Threat Intelligence has uncovered a supply chain attack by the North Korea-based threat actor Diamond Sleet (ZINC) involving a malicious variant of an application developed by CyberLink Corp., a software company that develops multimedia software products. This malicious file is a legitimate CyberLink application installer that has been modified to include malicious code that downloads, decrypts, and loads a second-stage payload.…

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SUMMARY

Note: This joint Cybersecurity Advisory (CSA) is part of an ongoing #StopRansomware effort to publish advisories for network defenders that detail various ransomware variants and ransomware threat actors. These #StopRansomware advisories include recently and historically observed tactics, techniques, and procedures (TTPs) and indicators of compromise (IOCs) to help organizations protect against ransomware.…

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Authors: Shilpesh Trivedi and Nisarga C M

In April 2023, the cybersecurity community faced a significant challenge with the discovery of CVE-2023-38831, a vulnerability affecting versions of WinRAR prior to 6.23. This security flaw has become a critical concern due to its exploitation by various advanced persistent threat (APT) groups, who have used it to gain control of victim systems through deceptive methods.…

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By Securonix Threat Research: Den Iuzvyk, Tim Peck, Oleg Kolesnikov

tldr:

An interesting ongoing SEO poisoning/malvertising campaign leveraging WinSCP lures along with a stealthy  infection chain lures victims into installing malware (alongside the legitimate WinSCP software). Attackers are likely leveraging dynamic search ads which let threat actors inject their own malicious code while mimicking legitimate sources like Google search pages.…

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