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

Static analysis result for SHA-256 504976a341549585…

MALICIOUS

Office (OLE) / .XLS

331.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: d87e453b784180be1b88d85e8ab4616f SHA-1: b928b6c62172076606ac08ed57d9bef0fed0bc38 SHA-256: 504976a341549585f2127ca456c93b3aea4d037430e8b623c8d851a0d3156e84
160 Risk Score

Malware Insights

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

The file contains a critical ClamAV detection for Doc.Downloader.Docusign0521-9864805-0, indicating it's a downloader. The presence of an Excel 4.0 macro with an Auto_Open function and a reference to ShellExecute strongly suggests it's designed to automatically execute malicious code upon opening. The macro likely uses the embedded URL to download and execute a second-stage payload. The document body text is minimal and does not provide further context.

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://bgms.co.in/ds/261120.gif
    • https://bgms.co.in/ds/261120.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
e213645668ce9f5d68f4226afb5b9b5e6c2ad49807658d9b833212b471c7c00d
xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6675 bytes