xorbot: A Stealthy Botnet Family That Defies Detection

I. Background of xorbot In November 2023, NSFOCUS Global Threat Hunting System detected that a type of elf file was being widely distributed and accompanied by a large amount of suspected encrypted outbound communication traffic. However, the detection rate of mainstream antivirus engines on this file was close to zero, which...

Interpretation of Guidelines for Secure AI System Development

Introduction On November 26, 2023,  the Guidelines for secure AI system development was jointly released by the UK National Cyber Security Centre (NCSC), the US Cybersecurity and Infrastructure Security Agency (CISA), in collaboration with the US National Security Agency (NSA), the Federal Bureau of Investigation (FBI), and the cybersecurity and...

The Imperative for Zero Trust in a Cloud-Native Environment

What is Zero Trust Security? Zero-trust security is not a specific technology or product, but a security model based on the concept that "All entities are untrusted". Forrester defines zero trust as “Zero Trust is an information security model that denies access to applications and data by default. Threat prevention...

Prepare, Prevent, and Response: A Comprehensive Ransomware Protection Guide

Rampant Ransomware Attacks On November 8, 2023, U.S. Eastern Time, ICBC Financial Services (FS), the U.S. arm of China's largest bank, fell victim to a ransomware attack, disrupting certain systems. Reports indicate that the attack, linked to a Citrix vulnerability known as "CitrixBleed," was orchestrated by the LockBit group. ICBC...

Apache ActiveMQ Jolokia Remote Code Execution Vulnerability (CVE-2022-41678) Notification

Overview Recently, NSFOCUS CERT found a remote code execution vulnerability in Apache ActiveMQ Jolokia (CVE-2022-41678). In the configuration of ActiveMQ, jetty allows org.holokia.http.AgentServlet to process requests for/api/Jolokia. An authenticated attacker can send a specially crafted HTTP request to write a malicious file through the Jolokia service, thus implementing remote code...

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