Verifying permissions for “Macintosh HD”

Hello,

I just performed a verify disk permissions with disk utility and received this message " Warning: SUID file “System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAg ent” has been modified and will not be repaired. " please can you help. I am worrying if it is a virus?

Thanks in advance.

D