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

Static analysis result for SHA-256 d9b13ef49c80375e…

MALICIOUS

Office (OLE) / .XLS

294.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 58eaac6124749d0e93df6d05a4380c22 SHA-1: 7e14c560484cb7e8ae065224a7d4978b9939ef9a SHA-256: d9b13ef49c80375e0a8cf20b840b1e8283b35c1a1a6adcbb4173eb25490530e0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File T1105 Ingress Tool Transfer

The file contains Excel 4.0 macros, specifically an Auto_Open macro that utilizes dangerous functions like RUN. The macro is designed to download and execute a payload from the URL https://morrislibraryconsulting.com/favicam/gertnm.php. This is further supported by ClamAV detection as a downloader.

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://morrislibraryconsulting.com/favicam/gertnm.php�
    • https://morrislibraryconsulting.com/favicam/gertnm.php

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
1285c5b3361ce10c1ced2dab5dc41ca4103395a9a3f8d497f56927e732f04b53		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 4516 bytes

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