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

Static analysis result for SHA-256 2879adfdc75edca4…

MALICIOUS

Office (OLE) / .XLS

51.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 4ab3cd041c47d3f028ed2226cae80aba SHA-1: 8de60fbbca4775c39fb06f48ad2847781b84c4fc SHA-256: 2879adfdc75edca43bc8f932be560b6ee1ad6c0925493c9916375a6960b778c8
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File T1071.001 Web Protocols

The presence of an XLM macro sheet with an Auto_Open function and the use of dangerous formula APIs indicate malicious intent. The document body's instruction to enable macros, combined with the embedded URLs, suggests a downloader mechanism. The XLM macro likely executes the 'RUN' API to download and execute a second-stage payload from the provided URLs.

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://celebridge.in/ptqsrjbebf/Dm
    • http://celebridge.in/ptqsrjbebf/530340.png

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
72f12b17a9d25725aa4b560dbfe2fabaa29f83c85cc22467bb403af77a7e5c13		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 3397 bytes

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