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

Static analysis result for SHA-256 a24839909a0b5b15…

MALICIOUS

Office (OLE) / .XLS

331.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 24dfeede02ed4c7d0d2eb6fc0c3b8add SHA-1: 8c2c93eb5cb4543bfa2b323df14f87ec87d9e1c3 SHA-256: a24839909a0b5b154debd7ff9b7a78bb87b135883c2b39b011953240c8a70a10
160 Risk Score

Malware Insights

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

The file contains Excel 4.0 macros, specifically an Auto_Open macro that utilizes dangerous functions like RUN and SHELLEXEC. This indicates the macro is designed to download and execute a second-stage payload from the embedded URL. The ClamAV detection name 'Doc.Downloader.Docusign0521-9864805-0' further supports the 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://ski-travel.pl/ds/231120.gif
    • http://ski-travel.pl/ds/231120.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
d0d7060848f9e43377c289847dba3120f97cf87e725bc4bc328c35415fe210f7		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6298 bytes

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