ValleyRAT Backdoor Hides in Signed Adware That Users Add to Antivirus Exclusions
The Hacker News · Aug 31, 2026
The threat actor known as Silver Fox has been observed distributing the ValleyRAT backdoor disguised as a signed Chinese adware application, running the malware under a trusted process to slip past users who add such software to their antivirus exclusions. Russian cybersecurity vendor Kaspersky said the attackers built the disguise around QN Wallpaper, a genuine Chinese desktop-wallpaper tool
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