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: May 16, 2026 ~ May 22, 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 52 new detectable malware families, 6,680 new detectable malicious code variants, and 28,571 new detection rules.

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

Number	Virus Name	Virus Description
1	Trojan/MSIL.MiniPlasma	This family of malware is a Trojan that primarily spreads and infects by exploiting system vulnerabilities. The virus disguises itself as legitimate software or hides within cracked programs and pirated applications to trick users into downloading and executing it, stealing sensitive user information such as bank accounts, passwords, and personal identification details.
2	Trojan/Win32.SepSys[Ransom]	The family is a type of Trojan, typically spreading through phishing emails, malicious downloads, or exploit-based attacks. Once infected, this malware encrypts users’ files and demands a ransom for decryption keys, posing a severe threat to computer systems.
3	Trojan/Win32.Cython[Dropper]	This family is a type of Trojan primarily spread through network downloads. It features independent propagation and strong stealth capabilities, attempts to conceal itself, steals users’ sensitive information, and compromises system security and stability.
4	Trojan/Win32.Megamz	This family is a type of Trojan primarily spread through phishing emails, malicious websites, or bundled with cracked software. Once it infects a system, it establishes persistence and connects to remote servers to download and execute malicious programs, posing a severe threat to data and system security.
5	Trojan/Win32.BUTTSniff	The family is a Trojan that infiltrates victims’ computer systems by deceiving users or carrying other malicious software. Once infected, it operates in the background, stealthily stealing sensitive information, monitoring user activities, and transmitting data to remote servers.

(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 May 22, 2026, the AVL SDK anti-virus engine can detect 18,579,352 malware variants of 57,892 malware families distributed in 8 basic categories, with a total of 41,950,955 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	59,636	6,813,894
Worms	315,183	3,943,303
Trojans	13,524,634	25,592,434
Hacking tools	457,955	364,287
Risk tools	1,206,343	2,226,494
Rogue software	3,015,564	3,009,362
Junk files	11	1,080
Test programs (for self-test)	26	101
Total	18,579,352	41,950,955

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

In the past week, monitoring revealed that the black-market organization “SwimmingSnake (Silver Fox)” primarily disseminated malicious activities through counterfeit websites, malicious installation packages, and spoofed official software websites (such as ToDesk, Sogou Input Method, WPS, and Google Chrome).

Its primary attack methods are:

1. Malicious installation packages create multiple layers of randomly named directories in specific directories, release malicious files, and set strict NTFS permissions on critical directories, making them completely hidden in Windows Explorer and requiring command line access for viewing.

2. Register a Windows service named with a random string to achieve self startup upon startup, and the service will quickly display a “stopped” status after startup, which is highly covert.

3. Using Module Stomping technology, inject Shellcode into the system process sihost.exe.

4. The injected process will connect to port 22 of the C2 server (disguised as SSH traffic) and use an encrypted custom protocol throughout the process.

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).