Unable to detect this Trojan (Trojan family name: SilverFox)

Hello.

I live in mainland China and recently, a malicious software named SilverFox (note: the name was misspelled as SliverFox due to a typo by the namer) has been spreading in China.

However, Avast cannot detect it, and the SilverFox family of malware continues to update its anti-detection measures. I hope Avast can strengthen its detection of this malware family.

Virus database: 250113-4

Here is a sample of SilverFox that I captured today, with the decryption password being “infected”.

Reference materials are below.

(English)MalwareBazaar | Checking your browser

(English)https://www.fortinet.com/blog/threat-research/valleyrat-campaign-targeting-chinese-speakers

(Chinese)微步在线X情报社区-威胁情报查询_威胁分析平台_开放社区

(Chinese)“银狐”家族木马升级攻击活动分析 - 安全内参 | 决策者的网络安全知识库

(Chinese)惊现“银狐”新木马,通过微信群传播 - 安全内参 | 决策者的网络安全知识库

(Chinese)多版本“银狐”木马加密要素分析 - 安全牛

Hope it will be detected soon.
You can send malware samples directly via this webform:

Hope it will be detected soon.
You can send malware samples directly via this webform:

This doesn’t work. Avast’s malware sample submission page has an unreasonably short timeout setting. This makes it impossible for users living in mainland China to submit any malware samples.

Moreover, what I hope for is that Avast adds a “specific detection method” for this malware family (as far as I know, ESET, Huorong, and Tencent have already done so).