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

Static analysis result for SHA-256 317f92579bf03406…

MALICIOUS

Office (OLE) / .XLSX

110.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 7d79337034644c63459eacc856a78a90 SHA-1: 75c24185470bd4fd87f3d92142841e04e25e7bec SHA-256: 317f92579bf03406b4318f8d2b54499872c5134ba4d7432e9297e6d647dc1f90
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File T1071.001 Web Protocols

The file contains an Excel 4.0 macro (XLM) with an Auto_Open function that utilizes dangerous formula APIs, specifically the RUN function. This macro is designed to download a file from the URL http://oceanbm.ca/hpplo/555555555.png and execute it. The document body contains text that suggests a lure to enable macros or editing, which is a common technique for macro-based malware delivery. The presence of the XLM_DANGEROUS_FN heuristic strongly indicates malicious intent.

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://oceanbm.ca/hpplo/555555555.png�
    • http://oceanbm.ca/hpplo/555555555.png

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
9e9ec2d22ac7379daeadedfc85977bfd4377249b9e9d8bd43d27f59ecd127e35		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 4733 bytes

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