Unlike standard archivers like WinRAR or 7-Zip, XTool does not create a final archive itself. Instead, it data to make it significantly smaller before you compress it with another tool.
xtool itself is not malicious, but its outputs (modified installers) often trigger heuristic detections because: razor12911 xtool precompression tool
7z.exe a -mx9 data.7z data_pre.pcf
It "unpacks" these internal streams into a more compressible raw state, allowing final compressors (like LZMA2) to achieve significantly better ratios. Unlike standard archivers like WinRAR or 7-Zip, XTool