>>1203that's because sokuroll (rollback aid; tool to have online matches without extreme amounts of lag), which comes with the repack of the full download injects itself into soku .exe on launch
it's not virus, but moriyashrine copy likely doesn't have the following:
1) SWR hooked up to it (to access SWR characters and their decks)
2) netplay aids (sokuroll)
3) score file to get access to all cards (downloadable from the wiki)
repack is not virus!