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

Static analysis result for SHA-256 9d816c8d8b40b7c7…

MALICIOUS

Office (OLE) / .XLS

86.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: b57731c3986c313103f06462cdaaacf1 SHA-1: 041a130e7708d7d909d4038eabd35d49d1587fb3 SHA-256: 9d816c8d8b40b7c7a6f9525dd306f7ff83d53ff5162edaf4ba4cd969c4f41f0d
80 Risk Score

Malware Insights

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

The sample is an Excel 4.0 (XLM) macro-enabled spreadsheet. It contains an Auto_Open macro that uses dangerous API functions, specifically the RUN function, indicating it's designed to execute arbitrary code. The document body contains text that appears to be obfuscated instructions or data related to downloading a file from the embedded URL. The presence of the 'SE_ENABLE_LURE' heuristic confirms that the document likely instructs the user to enable macros, a common social engineering tactic.

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://vyhml26anpfyb02aqsehz.com/fera/frid.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
7c4e6e8611159b572e384e022cb7e9edbaa0a964189883c047d79a06d41903f6
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 2390 bytes