Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e07a5802ea2a4bea…

MALICIOUS

Office (OLE)

67.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2020-09-15
MD5: ab84ccb4ee2842746775d24088356946 SHA-1: 806ab4b21840f042ad72d3bb31e914ed2a52a899 SHA-256: e07a5802ea2a4bea9e58cfd524c42d8cf586ca67652b9436ff2bb8de3b33d8a0
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is identified as an encrypted Excel 4.0 macro sheet, which is a strong indicator of malicious intent. The presence of an 'AUTOOPEN' macro further suggests that the file is configured to execute automatically when opened. While no specific family is identifiable, the technique points towards a macro-based attack.

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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