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

Static analysis result for SHA-256 e5bd266373d1de00…

MALICIOUS

Office (OLE) / .XLS

110.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: eb4393ce305a7de0ca3a6fd00264dba2 SHA-1: 548ff0d2020596b1cc0383a787e3fe8e42cfc949 SHA-256: e5bd266373d1de00ad5d90cab4b340c5805b45c6ee6bacd948402480eeda5e2d
80 Risk Score

Malware Insights

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

The presence of an Excel 4.0 macro sheet with an Auto_Open function and the 'SE_ENABLE_LURE' heuristic indicate a macro-based attack. The macro uses dangerous functions like RUN to execute code, and the embedded URL 'http://bartstoppel.com/rqfardzsgihu/555555555.png' is likely used to download a secondary payload. The document body contains text that appears to be sheet names and some API function names, further supporting the macro execution.

Heuristics 4

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://bartstoppel.com/rqfardzsgihu/555555555.png�
    • http://bartstoppel.com/rqfardzsgihu/555555555.png

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
2ae78684fbae61c5ba58bf278920340a68f1c332376f4df6517f78d1e3d8c92e		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 4731 bytes

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