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

Static analysis result for SHA-256 eab46740083c8299…

MALICIOUS

Office (OLE) / .XLSX

329.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: aa2d1436772c72db7fdc0e047fc50b9f SHA-1: acd1ddf85c2c47dcb1ee22de0b71380aedec29d9 SHA-256: eab46740083c8299c17490991860ed4db743e34dae8b1fe5635d70575a2ef741
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File T1059.001 PowerShell T1059.003 Windows Command Shell

The presence of Excel 4.0 (XLM) macros, specifically an Auto_Open macro utilizing dangerous functions like RUN, strongly indicates malicious intent. The heuristic firings suggest the macro is designed to execute external code, likely by leveraging ShellExecute. The embedded URL points to a GIF file, which is a common lure to disguise a malicious payload download. The ClamAV detection name 'Doc.Downloader' further supports this analysis.

Heuristics 5

  • ClamAV: Doc.Downloader.Docusign0521-9864805-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Docusign0521-9864805-0
  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • 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.
  • 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://bemojo.com/ds/161120.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
c7e4e7ed3c1ce4a0357cad7ea2d4765567912ff9637c55ef23ac64833b3a62a6		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6274 bytes

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