Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9aaa5ea23ec5700b…

MALICIOUS

Office (OLE)

296.5 KB Created: 2020-07-15 07:56:55 Authoring application: Microsoft Excel
MD5: 96e87a61e620b1baf182361512ec7e6e SHA-1: 3e8052094a4cdaf0acfb501f407b2650f562b31c SHA-256: 9aaa5ea23ec5700b15b0d6547ff16d0f0690aa77612ca71d6d76b0d024437952
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file is an encrypted Excel 4.0 macro sheet, indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. The presence of an AUTOOPEN macro (OLE_XLM_AUTOOPEN) suggests that malicious code is intended to execute automatically when the document is opened. The document body is heavily obfuscated and truncated, preventing further analysis of its specific intent or payload.

Heuristics 2

  • Encrypted Excel 4.0 macro sheet high OLE_XLM_ENCRYPTED_MACROSHEET
    Workbook contains an Excel 4.0 macro sheet and BIFF FILEPASS encryption. Password-protected XLM macro sheets, especially the default Excel password path, are a common malware evasion pattern because static formula extraction may fail until the workbook is decrypted.
  • 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.

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