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

Static analysis result for SHA-256 c862f2a05f1aeba9…

MALICIOUS

Office (OLE) / .XLS

315.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 5d0195b9bd2edc8eb617f0163125ebda SHA-1: 5e04ef08bb4f608601dcfe39064448344fecc3d5 SHA-256: c862f2a05f1aeba9053787dd0dac9ea05778da34bad8aeb647d83c058c123a23
120 Risk Score

Malware Insights

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

The file contains Excel 4.0 macros, specifically an Auto_Open macro that utilizes dangerous functions like RUN. The presence of embedded URLs suggests a downloader functionality. The ClamAV detection name 'Doc.Downloader.Docusign0521-9864805-0' further supports the conclusion that this is a downloader. The macro likely attempts to fetch and execute a payload from one of the provided URLs.

Heuristics 4

  • ClamAV: Doc.Downloader.Docusign0521-9864805-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Docusign0521-9864805-0
  • 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://body.inmedlabs.co.ke/ds/1702.Dc
    • https://body.inmedlabs.co.ke/ds/1702.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
2d446bf62854e0157873eab09d1af33bc4fba90e1809764f37dacab0e8c14859		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 3540 bytes

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