Based on the principles of transparency, accessibility, usability, verifiability and perceptibility of security capabilities, Antiy releases weekly updates of the AVL SDK anti-virus engine and the full set of capabilities to the public every week.

1.Weekly Update

Statistical period: March 28, 2026 ~ April 3, 2026

Antiy AVL SDK anti-virus engine released a total of 84 virus database updates this week, with an average of 12 updates per day, adding 32 new detectable malware families, 6,126 new detectable malicious code variants, and 23,231 new detection rules.

The following table shows the TOP5 newly detectable malicious code families:

Number	Virus Name	Virus Description
1	Trojan/JS.OrDeR[Downloader]	This family is a type of Trojan. The attackers stole the npm account of a core maintainer of Axios and released malicious samples in the repository. It automatically executes through the postinstall hook of npm packages and downloads the corresponding RAT payload from the C2 server based on the operating system. It also has self-deletion capabilities and is a cross-platform malicious JavaScript downloader.
2	Trojan/Win64.BlackBeard	This family is a type of Trojan, mainly spreading through phishing emails, malicious websites or bundled in cracked software. Once it infects a system, it establishes persistence and connects to a remote server to download and execute malicious programs, posing a serious threat to data and system security.
3	Trojan/Win64.OpagueCulvert[Backdoor]	This family is a type of Trojan that enters the victim’s computer system by deceiving users or carrying other malicious software. Once infected, it runs in the background and steals sensitive information in a hidden manner, monitors user activities and sends data to a remote server.
4	Trojan/Win64.PClocked[Ransom]	This family is a type of Trojan that is usually spread through phishing emails, malicious downloads or exploiting vulnerabilities. Once it infects a system, the malware encrypts the user’s files and demands a ransom for the decryption key, posing a serious threat to the computer system.
5	Trojan/MSIL.KlocmanDrop	This family is a type of Trojan that is mainly spread through network downloads. It has characteristics such as independent propagation and strong concealment. It attempts to hide itself, steal users’ sensitive information and damage the security and stability of the system.

(According to the HASH number of family samples within the period)

For more related content, please visit www.virusview.net (the Computer Virus Encyclopedia).

2. Full Detection Capabilities

As of 24:00 on April 3, 2026, the AVL SDK anti-virus engine can detect 18,533,729 malware variants of 57,670 malware families distributed in 8 basic categories, with a total of 41,770,813 detection rules.

The detection capabilities and the number of rules classified by malicious code are as follows:

Type	Detectable Malicious Code (Types)	Detection rules (Items)
Infectious viruses	59,595	6,805,495
Worms	314,592	3,937,909
Trojans	13,482,882	25,455,104
Hacking tools	457,028	361,996
Risk tools	1,205,502	2,212,008
Rogue software	3,014,093	2,997,124
Junk files	11	1,078
Test programs (for self-test)	26	99
Total	18,533,729	41,770,813

Preprocessing Capabilities (partial) :

There are 31 types of shells that can be unpacked (accurate to the type), and 132 packages that can be disassembled, including all common packages and self-extracting packages.

Supporting Knowledge Output Capabilities:

For malware payloads, the AVL SDK and the accompanying malware knowledge base can output 533 key behavior mapping tags, covering 139 categories of ATT&CK tactical tags, with a coverage rate of 64.29%, basically covering all the statically detectable tags in the ATT&CK framework.

3. Be on Guard Against These Virus Families This Week

This week, we must pay special attention to attacks on the open-source software supply chain. On March 31, 2026, the globally renowned JavaScript HTTP client library Axios was poisoned maliciously in the npm repository, becoming another major open-source supply chain attack following the LiteLLM incident. This poses a significant threat to the AI and Web software ecosystem. The attackers hijacked the maintainer’s account and implanted cross-platform malicious payloads into Axios’s versions 1.14.1 and 0.30.4, achieving “getting infected upon installation”. This library has been downloaded over tens of millions of times per week and is relied upon by numerous Web and AI applications, making the potential infection area extremely wide. Users are reminded to be cautious when downloading and installing related software and to promptly check for potential threats in the system. Antiy AVL SDK anti-virus engine, IEP EDR, and the online analysis platform have completed the rapid upgrade of threat feature libraries and detection rules.

附：Appendix: Introduction to Antiy AVL SDK Anti-Virus Engine

Antiy AVL SDK anti-virus engine is a threat detection capability middleware developed by Antiy for all architectures and system platforms. By embedding the AVL SDK, Antiy products and ecosystem partners’ products can acquire virus and malicious code detection capabilities, and receive continuous updates through the virus database.

For eight malicious code categories including infectious viruses, worms, Trojans, hacking tools, gray software, risky software, junk files, and test files, it accurately identifies and detects over 50,000 families and 18 million malicious code variants. The detection capability fully covers all known malicious codes and strictly adheres to the CARO convention. The output is structured and named in sections by classification, environment, and family, and based on the behavioral capabilities of malicious samples, it outputs nearly a hundred types of malicious behavior tags for typical malicious behaviors such as encryption ransomware, data theft, remote control, botnet programs, and mining. Antiy Engine can recognize over 300 file formats and conduct in-depth preprocessing on compilable executable formats such as PE and ELF. It also performs recursive unpacking of various packages (including self-extracting archives), and conduct structural analysis of compound documents such as OFFICE and ACAD files that may contain embedded scripts or vulnerability-prone formats. This ensures high robustness against malicious code. Antiy Engine also comes with a trusted file signature library, supporting the product to implement security policies based on blacklist and whitelist controls, significantly enhancing the difficulty for attackers.

Antiy’s detection capabilities can be fully deployed locally. Antiy automatically analyzes and processes over 2 million new file objects on average every day and releases a virus database update every two hours. It also provides support services such as cloud detection, cloud analysis, and computer virus encyclopedia.

Antiy AVL SDK is available in various versions such as traditional PC hosts, smart terminals, network traffic, IT application innovation systems, industrial systems, and unmanned systems. It provides threat detection capabilities for scenarios including host system and workload security, network traffic security, business flow security, email and file service security, etc. It fully supports various architectures such as X86, ARM, MIPS (including Cavium), RISC, and PowerPC, supports a variety of mainstream operating systems including domestic operating systems, Linux, and Windows, as well as real-time industrial operating systems like Vxwork. It also supports high-speed detection in backbone network scenarios.

Antiy AVL SDK empowers over 100 industry partners. In addition to Antiy’s own product deployment, Antiy Engine has cumulatively covered more than 4 billion nodes (including mobile terminals, secure and controllable PC endpoints, cloud-native nodes, network devices, network security devices, etc.), providing inherent security detection capabilities for mobile phones and smart terminals. The main partners using Antiy Engine include mobile phone enterprises such as Huawei, Xiaomi, Honor, VIVO and OPPO, large Internet enterprises such as Ant Financial, and several listed cybersecurity companies. Partner products using Antiy Engine have won internationally renowned evaluation awards such as AV-TEST and NSS Labs. The “L Tomahawk” logo of AVL SDK has become a symbol of reliable anti-virus capabilities.

All of Antiy’s products, including but not limited to IEP security protection system product family, Unified Workload Protect, Persistent Threat Detection System (PTD), Persistent Threat Analysis System (PTA), Attack Capture System, Qingzhu Zhiyu WAF, etc., all use Antiy anti-virus engine.

The AVL SDK anti-virus engine has been under development since 2001 and has undergone significant version upgrades and iterations. It has successively received support from key national initiatives, including: the Ministry of Science and Technology’s Innovation Fund for Technology-based Firms (2004), the Ministry of Science and Technology’s National High-Tech R&D Program (863 Program) (2006), the National Development and Reform Commission’s Information Security Special Project (2008), and the Ministry of Industry and Information Technology’s Engineering Special Project (2019). The mobile version of AVL SDK won the 2014 AV-TEST Best Protection Award for Mobile Devices. Products powered by the AVL SDK, Antiy PTD and PTA, won first place in both the first and second National Cybersecurity Technology Challenge competitions hosted by the National Computer Network Emergency Response Technical Team/Coordination Center of China (CNCERT/CC).