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

Static analysis result for SHA-256 d7c099b50f50e59e…

MALICIOUS

Office (OLE) / .XLS

90.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 164b52fc8e5316546296b4606e5b542c SHA-1: ecea3c8f6b6f12c87f9007dcf4d9cb08aed52f32 SHA-256: d7c099b50f50e59e6a3b6d744ec9f220b4799bd274c89bbff7e355dc3410ec7c
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 formula APIs, specifically RUN, indicating an attempt to execute arbitrary code. The document body suggests a lure to enable macros, a common technique for malware droppers. The embedded URL is likely used to download 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://45.11.183.252/22.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
0b5b119eb061b1b93590cf2630c71be563ede46fc4362728188f73409889e0bf		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 2597 bytes

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