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

Static analysis result for SHA-256 2ee39a241252fdaf…

MALICIOUS

Office (OLE) / .XLS

331.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: a313e062adc5c9912551083888d9423c SHA-1: e6cac97baa3ea13dde4dbd9c8e3060e03451ca77 SHA-256: 2ee39a241252fdafb7d3043c1879df00e2eb0120cb4e09a8b61750ff278f81ce
160 Risk Score

Malware Insights

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

The file contains Excel 4.0 macros, specifically triggering the 'Auto_Open' function with dangerous formulas like RUN. This indicates the macro is designed to execute arbitrary commands. The presence of 'ShellExecute' API reference further supports this, suggesting the macro attempts to download and execute a second-stage payload from the embedded URLs. The ClamAV detection name 'Doc.Downloader' also aligns with this behavior.

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://jpsteel.in/ds/261120.gif
    • https://jpsteel.in/ds/261120.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
0d33d3f7accc92fdd60dbf912082de478929da664f047bbfbed4791982921d46		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6676 bytes

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