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: April 12, 2025 ~ April 18, 2025

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 66 new detectable malware families, 7,041 new detectable malware variants, and 21,785 new detection rules.

The following table shows the TOP5 newly detectable malware families:

Number	Virus Name	Virus Description
1	Trojan/Win32.LummaStealz	This family is a kind of Trojan, which usually disguises itself as some normal files or programs to deceive users into installing. Once infected, it will engage in various malicious behaviors, including stealing users’ personal information and monitoring their online activities.
2	Trojan/Win32.Porto[Banker]	This family is a kind of Trojan, which mainly steals users’ bank account information by infecting computer systems. Its dissemination methods are diverse. It often disguises itself as legitimate software or files and hides in the network. Once implanted in the system, it will quietly execute malicious code to steal information.
3	HackTool/Win32.VPNBrute	This family is a kind of hacking tool, mainly spreading by infiltrating user systems, operating system vulnerabilities or software vulnerabilities, and hiding its malicious programs in the system to steal user information, damage system functions and pose a serious threat to the system.
4	Trojan/Win32.MadPebble	This family is a kind of Trojan that enters the victim’s computer system by deceiving users or carrying other malicious software. Once infected, it will run in the background and steal sensitive information in a hidden way, monitor the user’s activities and send data to the remote server.
5	Trojan/MSIL.EncnCrypt[Ransom]	This family is a kind of Trojan, which usually spreads through phishing emails, malicious downloads or vulnerability exploitation, etc. Once infected, this malicious software will encrypt the user’s files and demand a ransom to obtain the decryption key, posing a serious threat to the computer 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 18, 2025, the AVL SDK anti-virus engine can detect 18,019,940 malware variants of 56,585 malware families distributed in 8 basic categories, with a total of 56,435,750 detection rules.

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

Type	Detectable malware (Types)	Detection rules (Items)
Infectious viruses	57,836	9,609,647
Worms	303,609	5,528,622
Trojans	13,037,745	33,796,095
Hacking tools	444,366	468,851
Risk tools	1,191,101	2,993,267
Rogue software	2,985,259	4,037,678
Junk files	10	1,523
Test programs (for self-test)	14	67
Total	18,019,940	56,435,750

Preprocessing Capabilities (partial) :

There are 31 types of unpackable executable packers and 132 types of recognizable or extractable packages (including self-extracting archives).

Supporting Knowledge Output Capabilities:

For malware payloads, the AVL SDK is used in conjunction with the malware knowledge base, which can output 533 types of key behavior mapping tags and 139 types of ATT&CK threat attack framework technical and 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

Recently, Antiy Labs detected an active sample Trojan/Win32.Porto[Banker] on the Windows platform. This sample was captured in April 2025. The victim’s host is infiltrated through various means such as enterprise Wechat, search engine SEO promotion, and phishing emails. Porto espionage software transmits, downloads and executes malicious payloads through multi-stage obfuscation script execution, steals information from the victim’s host, and connects to suspicious domain names to transfer data.

3.1 Overview of the Porto Family

Family name	Porto
Appearance time	April 2025
Transmission pathways	Enterprise Wechat, search engine SEO promotion, and phishing emails
Targeted system	Windows
Technical features	Obfuscation script
Main hazards	Steal personal information
Utilize components/related families	Rugmi

3.2 Recommendations for Protection

For this Trojan, Antiy recommends the following protective measures:

(1) Install terminal anti-virus software: It is recommended to use host anti-virus and protection products such as Antiy Intelligent Endpoint Protection System that use the AVL SDK engine. It is recommended that users of Antiy IEP enable the ransomware defense tool module (enabled by default).

(2) Enhance password strength: Avoid using weak passwords. It is recommended to use 16-character or longer passwords, including combinations of uppercase and lowercase letters, numbers, and symbols. At the same time, avoid using the same password on multiple servers.

(3) Regularly change passwords: Change system passwords regularly to avoid password leaks that may lead to system intrusions;

(4) Timely update patches: It is recommended to enable the automatic update function to install system patches. System patches should be updated in a timely manner for vulnerable parts such as servers, databases, and middleware.

(5) Close high-risk ports: Adopt the minimization principle to external services and close unused high-risk ports such as 3389, 445, 139, and 135.

(6) Email Security: Handle suspicious emails carefully to avoid downloading unknown attachments or clicking on unfamiliar links.

(7) Disable PowerShell: If you are not using the PowerShell command-line tool, it is recommended to disable it.

(8) Regular data backup: Regularly back up important files, and the backed-up data should be isolated from the host.

Antiy Emergency Response Service

Antiy continuously empowers users to build an effective network attack security protection system and achieve effective security value.

National service hotline: 400-840-9234

Service support email: support@antiy.cn

Be Vigilant Against New Threats, Fortify Data Defenses!

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 malware detection capabilities, and receive continuous updates through the virus database.

For eight malware 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 malware variants. The detection capability fully covers all known malwares 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 malware. 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).