Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b758e63368072bda…

MALICIOUS

Office (OLE)

318.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: c790a44d768c4ae9b9119d61d2903420 SHA-1: 8e17762b6a9e1dc1e662c8f8b2ab5e5337954ed2 SHA-256: b758e63368072bda379034314fd29f05bc38fc380b331e2a91ff23a45c154fd8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The file is an Excel 4.0 macro sheet that uses the Auto_Open function to execute dangerous formula APIs, specifically the RUN function. This indicates an attempt to download and execute a second-stage payload from the embedded URL. The document body mentions 'DocuSign' and 'File Download', reinforcing the lure of a fake notification to trick the user into executing the payload.

Heuristics 4

  • ClamAV: Doc.Downloader.Docusign0521-9864805-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Docusign0521-9864805-0
  • 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://mapleleafnetwork.net/ds/1502.gif�
    • https://mapleleafnetwork.net/ds/1502.gif

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
fefece9127c35e2a9dbe91bfa66ed0ec5923eeac8572c5b22807ea99e41abfae		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 4374 bytes

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