Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 40d784072debca46…

MALICIOUS

Office (OLE)

161.5 KB Created: 2018-10-18 07:26:00 Authoring application: Microsoft Office Word First seen: 2019-04-18
MD5: de8c0a7fc41b7770a029c18fc67268d8 SHA-1: d49d9f81672d95caff725e51a39d96d4fcc2648a SHA-256: 40d784072debca462d12368ff50a473afba8b828ab315bfa9b562e596e89c600
302 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file contains a heavily obfuscated VBA macro with an auto-execution loader, indicated by multiple critical heuristic firings. The macro uses CreateObject and CallByName, suggesting it attempts to execute arbitrary code, likely to download and run a second-stage payload. ClamAV also detected this file as Doc.Malware.Valyria-6749505-0.

Heuristics 8

  • ClamAV: Doc.Malware.Valyria-6749505-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-6749505-0
  • VBA macros detected medium 5 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • CallByName call high OLE_VBA_CALLBYNAME
    CallByName call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 8615 bytes
SHA-256: a5cd781674963381e62ce20ca4e4f5c5d389a9c2594b179915a9b8ae439be612
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
Option Explicit


Sub CreateReport()

    Dim coll As Collection
    ' read the data
    Set coll = ReadAlbums(1990, 2001)
    
    ' Print the album details
    PrintAlbum coll

    ' Print the total sales
    PrintTotalSales coll
    
End Sub

Sub PrintAlbum(coll As Collection)
    
    Dim oAlbum As clsAlbum
    For Each oAlbum In coll
        Debug.Print oAlbum.Title, oAlbum.Artist
    Next
    
End Sub
Sub PrintTotalSales(coll As Collection)
    
    Dim oAlbum As clsAlbum, sales As Double
    For Each oAlbum In coll
        sales = sales + oAlbum.sales
    Next
    
    Debug.Print "Total number sales is " & sales
    
End Sub
Private Sub CommandB1_Click()
    Dim strFileName As String
    Dim objPic As Picture
    Dim rngDest As Range
    strFileName = Application.GetOpenFilename( _
        FileFilter:="Images (*.jpg;*.gif;*.png),*.jpg;*.gif;*.png", _
        Title:="Please select an image...")
    If strFileName = "False" Then Exit Sub
    Set rngDest = Me.Range("A18:C18")
    Set objPic = Me.Pictures.Insert(strFileName)
    With objPic
        .ShapeRange.LockAspectRatio = msoFalse
        .Left = 300
        .Top = 745
        .Width = 100
        .Height = 54
    End With

End Sub

Private Sub WorkshionChange(ByVal Target As Range)
  If Target.Count > 20 Then Exit Sub
   If Target.Column = 20 Then
       Target.Columns.ColumnWidth = 15
       Else
       Columns(20).ColumnWidth = 10
       Columns(21).ColumnWidth = 4
       Columns(22).ColumnWidth = 2
       
   End If
    If Target.Count > 25 Then Exit Sub
    If Target.Column = 25 Then
       Target.Columns.ColumnWidth = 45
       Else
      Columns(25).ColumnWidth = 16
   End If
    If Range("I41").Value = 1 Then
        Range("G39").Value = "[ Type ]"
   End If
    If Range("G34").Value = "" Then
        Range("G34").Value = "[ Type]"
   End If
       
     If Range("X42").Value = "" Then
        Range("X42").Value = "Type"
   End If
End Sub

Function ReadAlbums(startYear As Long, endYear As Long) _
              As Collection
    
    Dim rg As Range
    Set rg = Sheet1.Range("A1").CurrentRegion
    
    ' Create a collection to store the albums
    Dim coll As New Collection
    Dim oAlbum As clsAlbum
    
    Dim i As Long, Year As Long
    For i = 2 To rg.Rows.Count
        
        Year = rg.Cells(i, 3)
        If startYear <= Year And endYear >= Year Then
            ' Create new album
            Set oAlbum = New clsAlbum
            ' Add the details
            oAlbum.Artist = rg.Cells(i, 1)
            oAlbum.Title = rg.Cells(i, 2)
            oAlbum.Year = Year
            oAlbum.Genre = rg.Cells(i, 4)
            oAlbum.sales = rg.Cells(i, 5)
            ' Add the album objecdt to the collection
            coll.Add oAlbum
        End If
        
    Next i
    
    Set ReadAlbums = coll
    
End Function
Private Sub Create_XML()

Dim objDom As DOMDocument
Dim objRootElem As IXMLDOMElement
Dim objMemberElem As IXMLDOMElement
Dim objMemberRel As IXMLDOMAttribute
Dim objMemberName As IXMLDOMElement

Set objDom = New DOMDocument

' Creates root element
Set objRootElem = objDom.createElement("Family")
objDom.appendChild objRootElem
objMemberName.Text = "Some Guy"
' Saves XML data to disk.
objDom.Save ("H:\documents\The Project\XML File\XML_Test3.xml")
End Sub
Sub PivotSourceListAll()
Dim wb As Workbook
Dim ws As Worksheet
Dim wsList As Worksheet
Dim pt As PivotTable
Dim lPT As Long
On Error Resume Next

Set wb = ActiveWorkbook
Set wsList = Worksheets.Add
With wsList
  .Range(.Cells(1, 1), .Cells(1, 3)).Value _
      = Array("Sheet", "PivotTable", "Source Data")
End With
lPT = 2

For Each ws In wb.Worksheets
  For Each pt I
... (truncated)

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