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

Static analysis result for SHA-256 5161665dbc1b2619…

MALICIOUS

Office (OLE) / .XLS

164.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: ce1851e628a215e39eee820b3f629b5e SHA-1: fe805111a02aeb15d1cbece930b899195785956a SHA-256: 5161665dbc1b26196029cfc7eb77f87d0868a714cb692c698a0da2d84265e714
60 Risk Score

Malware Insights

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

The file is an Excel 4.0 spreadsheet containing an Auto_Open macro. This macro utilizes dangerous formula APIs, specifically the RUN function, to execute code. The embedded URL 'sundancemotelwy.com/dummy/counter' is highly suspicious and likely serves as the download location for a second-stage payload. The macro's intent is to download and execute this payload, leading to a malicious outcome.

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
bb7801d8828573115884615a5a94ba6dff737bcb28b0580f679905d467723f17		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 2242 bytes

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