Blog

Microsoft August Security Updates for Multiple High-Risk Product Vulnerabilities

agosto 27, 2021 | Jie Ji

Overview According to NSFOCUS CERT’s monitoring, Microsoft released August 2021 Security Updates on August 11 to fix 46 vulnerabilities, including high-risk remote code execution and privilege escalation, in widely used products like Windows, Microsoft Office, ASP.NET Core, Visual Studio, and Azure. This month’s security updates fix seven critical vulnerabilities and 39 important ones, including three […]

Security Visibility Augmented by Cloud Native

agosto 25, 2021 | Jie Ji

In the cloud native era, containerized infrastructure makes possible much more lightweight applications that run faster. Dozens or even hundreds of containers can be rapidly deployed and run on a host. What’s more, Kubernetes and other container orchestration platforms provide excellent security management mechanisms like load balancing, task scheduling, and fault tolerance. Therefore, in a […]

NSFOCUS Appraised Maturity Level 5 of CMMI Development V2.0

agosto 23, 2021 | Jie Ji

We are very excited to announce that NSFOCUS has been appraised at Maturity Level 5 of the CMMI Institute’s Capability Maturity Model Integration (CMMI)® Version 2.0. CMMI is a proven set of global best practices that drives business performance through building and benchmarking key capabilities. It is an integrated framework of best practices that can rapidly […]

SASE, Born for Digital Age

agosto 19, 2021 | Jie Ji

SASE (Security Access Services Edge, pronounced sassy /ˈsæsi/) is a network security service architecture introduced by Gartner in 2019. Gartner defines it as “an emerging offering combining comprehensive WAN capabilities with comprehensive network security functions (such as SWG, CASB, FWaaS, and ZTNA) to support the dynamic security access needs of digital enterprises.” In the diagram below, […]

Security Risks and Threats of Containerized Infrastructure

agosto 17, 2021 | Jie Ji

As a kind of lightweight virtualization technology, containers run in the operating system kernel of a host. Therefore, traditional security issues remain in hosts and networks. Besides, container escape risks, container image risks, virtual network risks, and configuration risks will become new security threats facing containerized infrastructure. Attacks on Container Images With the prevalence of […]

The New Trend of Ransomware: Triple Extortion

agosto 16, 2021 | Jie Ji

Threat actors who specialize in ransomware are always using Double Extortion Tactics in which they not only encrypt the victim’s data but also threaten to leak sensitive data publicly unless the ransom is paid. Double Extortion Tactics first started appearing in late 2019, becoming an increasingly common trend through 2020. The attack against Allied Universal […]

Linux Kernel Privilege Escalation Vulnerability (CVE-2021-33909) Threat Alert

agosto 13, 2021 | Jie Ji

Overview Recently, NSFOCUS CERT discovered that the Qualys research team disclosed a local privilege escalation vulnerability (CVE-2021-33909, aka Sequoia) in the filesystem layer in the Linux kernel. It is a size_t-to-int type conversion vulnerability in the seq_file interface in the Linux kernel. fs/seq_file.c’s improper restriction of the seq buffer allocation may cause an integer overflow, […]

What is Cloud Native Security

agosto 5, 2021 | Jie Ji

After nearly 20 years of cloud computing development, we have stepped into the cloud native era. Cloud native technologies, exemplified by container, service mesh, and micro-service, are bringing disruptive changes to IT infrastructure, platforms, and application systems deployed for various sectors and are also permeating industrial Internet platforms with IT/OT convergence, 5G infrastructure with IT/CT […]

Reflection on Detection of Encrypted Malware Traffic

julho 29, 2021 | Jie Ji

The Internet has become an indispensable part of our lives, and it is of vital importance to work out how to guarantee the security of users’ sensitive information and privacy in cyberspace. Most of the Internet traffic is encrypted with Transport Layer Security (TLS), which cannot guarantee absolute security. Malware has been seen to use […]

A Look into Source Code of Paradise Ransomware, a “Custom-Built” Virus – 2

julho 20, 2021 | Jie Ji

2. Encrypter: DP_Main 2.2 Self Copy and Automatic Running at Startup The program copies itself to %APPDATA%/DP/DP_Main.exe, and modifies the registry for automatic running at startup. 2.3 Deletion of Volume Shadow Backups The program uses CMD command parameters to delete volume shadow backups. 2.4 Upload of Encryption Information After obtaining disk information, the program begins […]