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

Static analysis result for SHA-256 e90e555813a05a58…

MALICIOUS

Office (OLE) / .XLS

331.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: babfdfebb830637aef50be0607a85ba9 SHA-1: 21ec0f0fb3c498ae7cc74fe907ffd2609ec37980 SHA-256: e90e555813a05a58f9875ba4c0a3e843caec4a71ffbc0ed1c0aad4e17c81d4a0
160 Risk Score

Malware Insights

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

The sample contains Excel 4.0 macros, specifically triggering the Auto_Open heuristic with dangerous functions like RUN. The ShellExecute API reference further indicates that the macro is designed to execute external commands. The embedded URL likely serves as the download location for a secondary payload. The ClamAV detection name 'Doc.Downloader.Docusign0521-9864805-0' suggests a document-based downloader.

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://5gict.com/ds/261120.gif
    • https://5gict.com/ds/261120.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
a172d04deb874bfc5428cadf9fe508e67386f425fa8a97e12d80c959c827f2d9		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6674 bytes

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