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

Static analysis result for SHA-256 7ff23e2615fd0713…

MALICIOUS

Office (OLE) / .XLS

185.5 KB Created: 2020-11-09 01:16:11 Authoring application: Microsoft Excel
MD5: f2621fe42ced4935e8e63be18574068d SHA-1: 8effc2892b349c2cc3bf00e2116ac6b632bef27f SHA-256: 7ff23e2615fd0713fdcd996294263259e85abe6895b8cd0e6ea318891b11cb46
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications

The sample is an encrypted Excel 4.0 macro sheet, indicated by the OLE_XLM_ENCRYPTED_MACROSHEET and OLE_XLM_AUTOOPEN heuristics. This suggests the file is designed to run malicious code upon opening. No specific IOCs were extracted, and the document body was unreadable.

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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