Quasar Linux (QLNX) – Inside a Full-Featured Linux RAT


In previous research, Trend Micro have demonstrated how AI can be used to improve detection accuracy when new malware families emerge, particularly those that reuse or share code from open-source repositories.

In this blog entry, Trends Micro researchers present another compelling finding from the same approach. Trend Micro platform recently flagged an unusual Linux implant with low detection, which caught their researchers attention and prompted a deeper investigation. What followed was the discovery of Quasar Linux (QLNX), a previously undocumented Linux remote access trojan (RAT) with rootkit capabilities and a notably minimal detection footprint.

Read more…
Source: Trend Micro


Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox


Related:

  • Accused data thief threw MacBook into a river to destroy evidence

    December 29, 2025

    South Korean e-tailer Coupang claims a former employee has admitted to improperly accessing data describing 33 million of its customers, but says the accused deleted the stolen data. In a post published on Christmas, Coupang revealed it worked with Mandiant, Palo Alto Networks, and Ernst & Young, to conduct a forensic investigation into the incident, and ...

  • South Korea: Shinhan Card reports massive data breaches

    December 26, 2025

    Shinhan Card, one of the country’s top credit card issuers, reported a massive data leak Tuesday. The Seoul-based company said more than 190,000 cases of potential data exposure have been identified that involve merchant partners’ personal and business information. The incident seems to stem from employee actions rather than an external cyberattack. Against this backdrop, Shinhan ...

  • Threat landscape for industrial automation systems in Q3 2025

    December 25, 2025

    In Q3 2025, the percentage of ICS computers on which malicious objects were blocked decreased from the previous quarter by 0.4 pp to 20.1%. This is the lowest level for the observed period. Regionally, the percentage of ICS computers on which malicious objects were blocked ranged from 9.2% in Northern Europe to 27.4% in Africa. The most ...

  • Hackers stole over $2.7B in crypto in 2025, data shows

    December 23, 2025

    Cybercriminals stole $2.7 billion in crypto this year, a new record for crypto-stealing hacks, according to blockchain-monitoring firms. Once again, in 2025, there were dozens of crypto heists hitting several cryptocurrency exchanges and other web3 and decentralized finance (DeFi) projects. The biggest hack by far was the breach at Dubai-based crypto exchange Bybit, where hackers stole ...

  • Nissan says Red Hat breach affected thousands of customers

    December 23, 2025

    Japanese car giant Nissan has confirmed losing sensitive data on thousands of people as a result of a third-party supply chain attack. In a press release, the company said the recent attack on Red Hat affected its customers, as well, as the latter was commissioned by Nissan to develop a customer management system for one of ...

  • US insurance giant Aflac says hackers stole personal and health data of 22.6 million people

    December 23, 2025

    In June, U.S. insurance giant Aflac disclosed a data breach where hackers stole customers’ personal information, including Social Security numbers and health information, without saying how many victims were affected. On Tuesday, the company confirmed it has begun notifying around 22.65 million people whose data was stolen during the cyberattack. In a filing with the Texas ...