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

Static analysis result for SHA-256 c77c9102076b4f53…

MALICIOUS

Office (OOXML) / .XLSX

52.1 KB Created: 2015-06-05 18:17:20 UTC Authoring application: Microsoft Excel 16.0300
MD5: c0e6184d70b829d521fe98687e6d4fe6 SHA-1: e11b511bf962995cea5a0355b7a1a77e7fc47fef SHA-256: c77c9102076b4f53e3ef5874a9cf098728374f0c7c1867aa56199f8ad9694fdc
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file is an OOXML spreadsheet containing VBA macros, indicated by the 'OOXML_VBA' heuristic. The 'OLE_VBA_CREATEOBJ' heuristic suggests the macro attempts to execute arbitrary code. The document body contains a message prompting the user to enable security protection to view the full content, which is a common lure for macro-based attacks. No specific URLs or executable payloads were extracted, limiting further analysis.

Heuristics 3

  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • 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.openxmlformats.org/spreadsheetml/2006/main
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac
    • http://schemas.microsoft.com/office/spreadsheetml/2014/revision
    • http://schemas.microsoft.com/office/spreadsheetml/2015/revision2
    • http://schemas.microsoft.com/office/spreadsheetml/2016/revision3

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
dc27406ffa6e81d40049b02400d281cab30067947a0158d565d9eca734faa4d4		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1860 bytes
vbaProject_00.bin
594266afca3405b944a09044cb348f59bd7dcd5653fe2e5272434deaf1c76862		 vba-project OOXML VBA project: xl/vbaProject.bin 15872 bytes

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