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

Static analysis result for SHA-256 90172d47ab45422b…

MALICIOUS

Office (OLE) / .XLS

331.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: b34efede30bcfeb68f7944929eae966d SHA-1: 54b9fca9bee4481150651fe43a5ba97f3c468e67 SHA-256: 90172d47ab45422bbd20f11199fbc46efca84557386764b6f37b47e5986350bb
160 Risk Score

Malware Insights

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

The sample is an Excel 4.0 (XLM) macro sheet, identified by the OLE_XLM_AUTOOPEN heuristic. The presence of dangerous formula APIs like RUN indicates it's designed to execute arbitrary code. The ShellExecute API reference further supports this, suggesting the macro attempts to launch an external process. The embedded URL likely serves as the download location for a secondary payload. The ClamAV detection name 'Doc.Downloader' reinforces 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 https://shmncbd.com/ds/231120.gif
    • https://shmncbd.com/ds/231120.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
235e5c8d20c84fa7e893c28de1bcc715b3fa59f4feb5de8e7a84ebbe334d22cc		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6059 bytes

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