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Silver Fox Uses Fake Tax Notices to Deploy ValleyRAT and New ABCDoor Backdoor

📅 5 May 2026 at 15:19 UTC📰 Cyber Security NewsView original source ↗
Silver Fox Uses Fake Tax Notices to Deploy ValleyRAT and New ABCDoor Backdoor

A Chinese-linked threat group known as Silver Fox has been running a calculated phishing campaign, tricking employees at organizations across multiple countries into opening what appear to be official tax authority notices. The emails, disguised as legitimate government communications, led victims to download a chain of malware that ultimately installed both the known ValleyRAT backdoor […] The post Silver Fox Uses Fake Tax Notices to Deploy ValleyRAT and New ABCDoor Backdoor appeared first on Cyber Security News.

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

Silver Fox, a Chinese-linked threat group, used fake tax notices to trick employees into downloading malware, including ValleyRAT and ABCDoor backdoor. This phishing campaign targeted organizations across multiple countries.

⚙️Technical Details
Affected Systems
Employees' personal devices
Attack Vectors
Phishing emails disguised as official government communications
💥Impact Assessment
Severity: High
Who Is at Risk
Employees of organizations across multiple countries
🛡️Recommended Actions
1Implement robust email filtering and security awareness training for employees
2Regularly update antivirus software to detect ValleyRAT and ABCDoor backdoor
3Conduct thorough network scans for suspicious activity
📦Affected Products
Software:Employees' personal devices

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