WebCookiesSniffer is a safe, legitimate utility when downloaded directly from the official NirSoft website. It is a freeware network packet sniffer that captures and displays website cookies sent between web browsers and servers in real-time.
However, because the tool captures sensitive data, it is heavily scrutinized by antivirus software. Below is an in-depth security analysis of the tool. Why Antivirus Flags WebCookiesSniffer
If your antivirus triggers a warning when you download or run WebCookiesSniffer, this is a false positive. WebCookiesSniffer – Capture Web site cookies – NirSoft
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