Name: BAT.Vr.71 Category: Viruses Description: Details BAT.Vr.718 It is a harmless nonmemory resident parasitic batch virus. It searches for BAT files, then writes itself to the end of the file and inserts in the beginning of file a jump command and label. When an infected file is executed, the virus gets control, infects other batch files, returns control the host file, and terminates. Before infection After infection +--------+ +--------+ | Host | | jump |-+ | file | |--------| | | | +>| | | | | | | | | +--------+ | | | | | |--------|<+ +-| Virus |-+ | | | +--------+<+ The virus is named after the labels in its code - they begin with letters 'Vr'. The virus does not manifest itself in any way.