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

Static analysis result for SHA-256 e742d5eafa91695b…

MALICIOUS

Office (OLE) / .XLS

24.5 KB Created: 2020-09-20 21:17:44
MD5: 95260231f4e87d8a58ad35b8d2b6e965 SHA-1: 129226d22bb541495ff427e9f4a421cb09557a12 SHA-256: e742d5eafa91695b74f952297eaf1e108c6d8519cff80570acb52a97e3622dd6
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.001 PowerShell

The sample is an Excel 4.0 macro-enabled spreadsheet. Heuristics indicate the presence of an Auto_Open macro that uses dangerous formula APIs, specifically the RUN function, which is highly indicative of malicious intent. The macro likely attempts to download and execute a second-stage payload from the embedded URL. The confidence is high due to the direct use of XLM macros and the RUN function.

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 https://cutt.ly/GhWMjQy

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
ae66e83199c6eb1afd4e6fafc08d43398edbb529488894880f162521f8dc6761		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 1599 bytes

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