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

Static analysis result for SHA-256 9050396227d5aa1f…

MALICIOUS

Office (OLE) / .XLS

165.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 6c2ed51eb9e7160b9ab6a6a9ae8fdc1b SHA-1: 238dd183fb490abaeb7629865d80b249b2b79c31 SHA-256: 9050396227d5aa1fab746a29861ad3c25be2bcf4a7edaa97d67b6f4e24666b3f
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.001 PowerShell

The file is an Excel 4.0 macro-enabled spreadsheet. Heuristics indicate the presence of an Auto_Open macro that uses dangerous functions, specifically the RUN function, to execute arbitrary code. The embedded URL 'http://destinostumundo.com/layout/recruter' is likely used to download and execute a second-stage payload. The document body text is minimal and appears to be a lure.

Heuristics 3

  • 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 http://www.iec.ch
    • http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/photoshop/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
4302061d4d1d673c8e0e80768f37c31c65a30978d2ab0c5df197261363c12f9f		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 1969 bytes

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