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

Static analysis result for SHA-256 3c9328be42be9c06…

MALICIOUS

Office (OLE) / .XLS

51.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 4e8a0d80dbab8fbf61eabcf887155eb8 SHA-1: 7580776629aec0c755b5bbafb93274390a346a23 SHA-256: 3c9328be42be9c0620d7c29151afe4361d8bf1278cd28844f4e5845de037c77f
80 Risk Score

Malware Insights

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

The file is an Excel 4.0 macro-enabled spreadsheet. The presence of an Auto_Open macro with dangerous functions, specifically the RUN function, indicates malicious intent. The document also contains a lure to enable macros, a common technique for malware droppers. The embedded URLs are likely used to download and execute a second-stage payload.

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://www.desilverenspiegel.nl/igdeiw/D�
    • http://www.desilverenspiegel.nl/igdeiw/530340.png

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
8721c2f78696255c1e32b31439afa218f8fe51eee8bea3cda1b9b12cb7606bc7
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 3680 bytes