Quasar RAT | Breaking Cybersecurity News | The Hacker News

Cybersecurity researchers have discovered a malicious package on the npm package registry that masquerades as a library for detecting vulnerabilities in Ethereum smart contracts but, in reality, drops an open-source remote access trojan called Quasar RAT onto developer systems. The heavily obfuscated package, named ethereumvulncontracthandler , was published to npm on December 18, 2024, by a user named "solidit-dev-416." As of writing, it continues to be available for download. It has been downloaded 66 times to date. "Upon installation, it retrieves a malicious script from a remote server, executing it silently to deploy the RAT on Windows systems," Socket security researcher Kirill Boychenko said in an analysis published last month. The malicious code embedded into ethereumvulncontracthandler is obscured with multiple layers of obfuscation, leveraging techniques like Base64- and XOR-encoding, as well as minification to resist analysis and detection efforts. ...

Cyber attackers never stop inventing new ways to compromise their targets. That's why organizations must stay updated on the latest threats.  Here's a quick rundown of the current malware and phishing attacks you need to know about to safeguard your infrastructure before they reach you. Zero-day Attack: Corrupted Malicious Files Evade Detection by Most Security Systems  The analyst team at ANY.RUN recently shared their analysis of an ongoing zero-day attack . It has been active since at least August and still remains unaddressed by most detection software to this day. The attack involves the use of intentionally corrupted Word documents and ZIP archives with malicious files inside. VirusTotal shows 0 detections for one of the corrupted files Due to corruption, security systems cannot properly identify the type of these files and run analysis on them, which results in zero threat detections. Word will ask the user if they want to restore a corrupted file Once these fi...

A suspected Vietnamese-origin threat actor has been observed targeting victims in several Asian and Southeast Asian countries with malware designed to harvest valuable data since at least May 2023. Cisco Talos is tracking the cluster under the name  CoralRaider , describing it as financially motivated. Targets of the campaign include India, China, South Korea, Bangladesh, Pakistan, Indonesia, and Vietnam. "This group focuses on stealing victims' credentials, financial data, and social media accounts, including business and advertisement accounts," security researchers Chetan Raghuprasad and Joey Chen  said . "They use RotBot, a customized variant of Quasar RAT, and XClient stealer as payloads." Other commodity malware used by the group comprises a combination of remote access trojans and information stealers such as  AsyncRAT ,  NetSupport RAT , and Rhadamanthys . The targeting of business and advertisement accounts has been of particular focus for attacke...

The open-source remote access trojan known as  Quasar RAT  has been observed leveraging DLL side-loading to fly under the radar and stealthily siphon data from compromised Windows hosts. "This technique capitalizes on the inherent trust these files command within the Windows environment," Uptycs researchers Tejaswini Sandapolla and Karthickkumar Kathiresan  said  in a report published last week, detailing the malware's reliance on ctfmon.exe and calc.exe as part of the attack chain. Also known by the names CinaRAT or Yggdrasil, Quasar RAT is a C#-based remote administration tool capable of gathering system information, a list of running applications, files, keystrokes, screenshots, and executing arbitrary shell commands. DLL side-loading  is a  popular   technique  adopted by  many threat actors  to execute their own payloads by planting a spoofed DLL file with a name that a benign executable is known to be looking for. "Adversarie...