Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8a9d5dca525ab713…

MALICIOUS

Office (OLE)

301.0 KB Created: 2020-07-15 07:56:55 Authoring application: Microsoft Excel
MD5: 2eda538dca27c500c1d8b786c9883ace SHA-1: 419c58c05a1e9d2e72d98cb00a1ae1226f461368 SHA-256: 8a9d5dca525ab713e4468464b6bc444f49fd16afa297026f5aa026e9f1d431f5
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 OLE_XLM_AUTOOPEN heuristic suggests that the macros are designed to run automatically upon opening the document. Due to the encrypted nature and lack of readable document body or script content, the exact payload and delivery mechanism cannot be determined, leading to an unknown family classification.

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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