
Kudos to @Bitdefender 👏
I came across a file that’s part of their software with no DACL set— at first glance, it looked like a serious security issue.
Tried modifying it → blocked. ✅
A quick investigation revealed they use a filesystem filter driver (vlflt) to protect their files.
A simple yet robust approach. Many competitors don’t implement this.
Could be vulnerable if an attacker disables the filter driver.

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