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

Static analysis result for SHA-256 e131fb1d372c84dd…

MALICIOUS

Office (OLE) / .XLS

90.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: f9516d3d3d1cd593e265e44d5861977c SHA-1: 106e98c1ed305665d67f0b4c2226dfde047e6f21 SHA-256: e131fb1d372c84dda8c99969331a37daec1179ca6746c42e37ca8cf881c01b4f
80 Risk Score

Malware Insights

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

The file contains Excel 4.0 macros, specifically an Auto_Open macro that utilizes dangerous functions like RUN. The document body contains text that appears to be a lure to enable macros. The embedded URL is likely used to download and execute a second-stage payload. The presence of XLM macros and the download-and-execute pattern suggest a downloader.

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://45.11.183.181/22.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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