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

Static analysis result for SHA-256 2ce530e6fc450ece…

MALICIOUS

Office (OLE) / .XLSX

32.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 370a6b5f219d9b5a633570c607dccc40 SHA-1: 5f9960857369fe8e45435689cffe7150639aac13 SHA-256: 2ce530e6fc450ece63ab0a2901f77b75d4510fa2df9b2e07f9bd046744b55c5b
88 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.004 Scripting: Visual Basic T1204.002 Malicious Link

The file is an Excel 4.0 (XLM) macro-enabled spreadsheet. It contains an Auto_Open macro that uses dangerous formula APIs, specifically the RUN function, indicating it attempts to execute external code. The presence of an 'enable lure' heuristic confirms the document likely prompts the user to enable macros. The embedded URL is likely used to download a second-stage payload.

Heuristics 5

  • XLM Auto_Open with dangerous formula APIs high OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • VBA project contains no executable statements low OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
  • 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://188.127.224.100/%f%

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
2be15c634779cf2b3e1484f4136edc55a719f6036cc7272362139fc35b4cd6f1		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 747 bytes
macros.bas
6ef16962a7d1736287e80a5790fa109ca5c76acb8ae2190be54273430dbfbedb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 371 bytes

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