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

Static analysis result for SHA-256 485d659f6acbd970…

MALICIOUS

Office (OOXML) / .XLSM

1.31 MB Created: 2014-11-24 00:22:00 UTC Authoring application: Microsoft Excel 14.0300 First seen: 2025-07-04
MD5: 2e2e97570f6ee510fc5fd601ff93d852 SHA-1: 5155440a7bab308cfee219696416a854426783d5 SHA-256: 485d659f6acbd970002813bc642b42887be254718f3a294f5202c6a78652f459
258 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1059.001 PowerShell T1204.002 Malicious File

The sample is a macro-enabled Excel file (XLSM) containing obfuscated VBA code designed to execute upon opening. The Workbook_Open macro uses CreateObject to make an HTTP request to 'http://13.127.108.165:8080/Services/sizeChartTemplateService.svc/getsizecharttemplate' to download and process data, likely a second-stage payload. This indicates an Ingress Tool Transfer (T1105) attack pattern.

Heuristics 9

  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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.
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present
  • External hyperlinks (2) low OOXML_EXTERNAL_HYPERLINKS
    Document contains 2 external hyperlinks — clickable URLs are stored as external relationships. First target: mailto:04021010@5
  • Hidden worksheet (hidden) low OOXML_HIDDEN_SHEET
    Excel workbook contains 1 hidden sheet(s) — hidden sheets are commonly used to conceal macro code, staging data, or intermediate payload construction
  • 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://in-procure.brainbees.com/purchaseapibackend/index.php/PoexceldataController/
    • http://stagepurchase.fcappservices.in/Indiastage/CommonFiles/
    • http://13.127.108.165:8080/Services/sizeChartTemplateService.svc/getsizecharttemplate
    • http://13.127.108.165:8080/Services/sizeChartTemplateService.svc/getclothesmaterialinfo
    • https://cdn.ae1stcry.com/brainbees/contentapp/dataprocess/productinfo/productmaterialinfo/productmaterialinfo.json
    • http://13.127.108.165:8080/Services/sizeChartTemplateService.svc/getshoessolematerialinfo
    • https://cdn.ae1stcry.com/brainbees/contentapp/dataprocess/productinfo/shoessolematerialinfo/shoessolematerialinfo.json
    • https://in-procure.brainbees.com/purchaseapibackend/index.php/PoexceldataController/getbrandmasterlist
    • http://stagepurchase.fcappservices.in/Indiastage/CommonFiles/Brands.json
    • https://in-procure.brainbees.com/purchaseapibackend/index.php/PoexceldataController/getcolormasterlist
    • https://in-procure.brainbees.com/purchaseapibackend/index.php/PoexceldataController/getcategorylist
    • http://stagepurchase.fcappservices.in/Indiastage/CommonFiles/Category.json
    • https://in-procure.brainbees.com/purchaseapibackend/index.php/PoexceldataController/getsubcategorylist
    • http://stagepurchase.fcappservices.in/Indiastage/CommonFiles/SubCategory.json
    • http://10.0.0.56:8080/UAT/POType1.json
    • http://10.0.0.56:8080/UAT/SilhouetteShape1.json
    • http://10.0.0.56:8080/UAT/FactorySize.json
    • http://10.0.0.56:8080/UAT/getjsonfroms3ageonesize.json
    • http://stagepurchase.fcappservices.in/Indiastage/CommonFiles/StyleGrading.json
    • http://stagepurchase.fcappservices.in/purchaseapibackend/index.php/PoexceldataController/getfootwaredefaultsizelist
    • http://stagepurchase.fcappservices.in/purchaseapibackend/index.php/PoexceldataController/getfootwearsizelist
    • http://stagepurchase.fcappservices.in/purchaseapibackend/index.php/PoexceldataController/getjsonfroms3StoryName
    • https://cdn.ae1stcry.com/brainbees/contentapp/dataprocess/productinfo/sizecharttemplate/sizecharttemplate.json
    • https://github.com/VBA-tools/VBA-JSON
    • http://www.vbaccelerator.com/home/VB/Code/Techniques/RunTime_Debug_Tracing/VB6_Tracer_Utility_zip_cStringBuilder_cls.asp
    • https://github.com/VBA-tools/VBA-UtcConverter
    • http://www.shutupdean.com/ExcelWebServices/VBAWebServices.asmx
    • http://www.opensource.org/licenses/mit-license.php
    • http://code.google.com/p/vba-json/
    • http://msdn.microsoft.com/en-us/library/windows/desktop/ms724421.aspx
    • http://msdn.microsoft.com/en-us/library/windows/desktop/ms724949.aspx
    • http://msdn.microsoft.com/en-us/library/windows/desktop/ms725485.aspx
    • http://support.microsoft.com/kb/269370
    • http://www.ietf.org/rfc/rfc4627.txt
    • https://support.microsoft.com/en-us/kb/272138
    • http://www.w3.org/1999/XSL/Transform
    • http://www.opensource.org/licenses/mit-license.php)�

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
66c2da5f74dfbf5ca5e18f27d566ed50b0a402a9378343ec70b3f0c5454961d7		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 242538 bytes
vbaProject_00.bin
b25ec9c0f06fc2bf2416d6f194ca3f69c064b596f7f9270261eb85d4b7194b6b		 vba-project OOXML VBA project: xl/vbaProject.bin 475136 bytes

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