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

Static analysis result for SHA-256 279bf00b0c81ab8b…

MALICIOUS

Office (OLE) / .XLS

228.0 KB Created: 2020-11-28 13:42:19 Authoring application: Microsoft Excel
MD5: 1a7cd8bd3fcf0b4a7f351a148dc7e40a SHA-1: e336117d94537924cf4ecef038231b29bafdf261 SHA-256: 279bf00b0c81ab8baeb09989215ad376377c40a3abd4358d041ec06746c986fe
60 Risk Score

Malware Insights

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

The presence of an Excel 4.0 macro sheet with Auto_Open and dangerous formula APIs (RUN) indicates malicious intent. The macro likely attempts to download and execute a payload from the embedded URL. While the URL itself is marked as benign, the macro execution mechanism is inherently suspicious and warrants further investigation.

Heuristics 3

  • 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.
  • 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://tinyurl.com/whh7gqu7�
    • http://tinyurl.com/whh7gqu7

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
7c2678d75e0ddfde7f2edbeeb8ea56469f7eac43f1a6c8790b68fbbe7e1076e4		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 1263 bytes

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