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

Static analysis result for SHA-256 fa91ce23ced7e651…

MALICIOUS

Office (OLE) / .XLS

331.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 229d71546477da8f1ba438542bd4fb85 SHA-1: 4bb365d4006c5cd29787bf4bbc99c36832174c2d SHA-256: fa91ce23ced7e651774b98c9806caec1229dc23bec174f1c8510dbc3d01ec68a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File T1059.001 PowerShell

The file contains an Excel 4.0 macro sheet with an Auto_Open function that utilizes dangerous APIs, specifically ShellExecute and RUN. This indicates the macro is designed to execute arbitrary commands. The embedded URL likely points to a second-stage payload. The ClamAV detection name 'Doc.Downloader.Docusign0521-9864805-0' further suggests a downloader functionality.

Heuristics 5

  • ClamAV: Doc.Downloader.Docusign0521-9864805-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Docusign0521-9864805-0
  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • 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://panzr.tech/ds/231120.gif
    • http://panzr.tech/ds/231120.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
c8b1e7a8344e098ddc3906ba00141dccfa02d07406793ff05618684390276899		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6057 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.