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

Static analysis result for SHA-256 ad3e9133a1bff9ce…

MALICIOUS

Office (OLE) / .XLS

970.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 4d6fe1f68f7a6aede242bd98141a6ac1 SHA-1: 1dd905599a25ab37d42cd4405455b1208bffe6d2 SHA-256: ad3e9133a1bff9ce12c1df9a78d23e2490be366c283a28a351cb53f74cc3226c
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File

The critical heuristic OLE_XLM_AUTOOPEN_DEFINEDNAME indicates the presence of an Excel 4.0 Auto_Open macro, which is designed to execute automatically when the workbook is opened. The DOC BODY and script fragments suggest a lure related to DocuSign, directing the user to the URL http://beachtreepestcontrol.com/viewer/counter.php. This URL is likely used to download and execute a second-stage payload.

Heuristics 2

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
7a4e71f3c35eb5ad8d8ed644d4980a335b4d641facc8695ce281666f33280fad		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 2012 bytes

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