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

Static analysis result for SHA-256 c9251eca7ba7465e…

MALICIOUS

Office (OLE) / .XLS

191.5 KB Created: 2021-02-23 19:30:17 Authoring application: Microsoft Excel
MD5: 4c6ff041b7f425a47a8371d747fab529 SHA-1: f8580abb74823f129c21fc5b83dfc32f0167a480 SHA-256: c9251eca7ba7465e39bc842b6d37be96d66b21cb3412067e5c008308de1ee99c
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an encrypted Excel 4.0 macro sheet, as indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. This strongly suggests a malicious macro-based document. The absence of readable document body text and scripts prevents a more detailed analysis of the specific lure or payload, leading to an 'unknown family' classification and a slightly reduced confidence score.

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.

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