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

Static analysis result for SHA-256 5c5bdbafd1f62769…

MALICIOUS

Office (OLE) / .XLS

192.0 KB Created: 1999-12-24 16:36:33 Authoring application: Microsoft Excel
MD5: 44b66a5f4d1acf1bae8efc5ef277f4c3 SHA-1: a503513856af7beb889c2f2c632cd11ef134f12f SHA-256: 5c5bdbafd1f62769f542bc18fa9e80a2683cbe84c473bb08e71e3037fad5e8d5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file contains both VBA and Excel 4.0 macros, with a Workbook_Open event triggering the execution of the Excel 4.0 macros. The presence of an embedded URL suggests the intent is to download and execute a secondary payload, likely a Windows executable. The specific macro logic appears to be related to a game interface, but the primary malicious function is the payload download.

Heuristics 4

  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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://ccwater.com/dvd/d.exe�

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
1e2146545f848881b6974ace600b15cc6a57bb6c0dbcce63506efaed6758b4fd		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 17500 bytes
macros.bas
4f20ba194974de741021461a615367ae108d6239dda75d8a62f9cad6cfac3ff0		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 27327 bytes

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