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

Static analysis result for SHA-256 e2c69e91f38acba4…

MALICIOUS

Office (OLE) / .XLS

331.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 180605876f821e1dbf968bc54e60af62 SHA-1: eb16225fdd9c6dbb1430f11ddd3a66e6fb2ea3dc SHA-256: e2c69e91f38acba46e85dd87c545f3820ec385e6ceda41abfc402d6fb1563496
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File T1059.004 Scripting - PowerShell T1105 Ingress Tool Transfer

The critical ClamAV heuristic and the presence of an Excel 4.0 macro (OLE_XLM_AUTOOPEN) indicate malicious intent. The macro uses ShellExecute (SC_STR_SHELLEXEC) and dangerous functions (OLE_XLM_DANGEROUS_FN) to likely download and execute a payload from the embedded URL. The document body text is minimal and does not provide further context on the lure.

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://5gict.com/ds/261120.gif
    • https://5gict.com/ds/261120.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
a172d04deb874bfc5428cadf9fe508e67386f425fa8a97e12d80c959c827f2d9		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6674 bytes

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