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

Static analysis result for SHA-256 099bc1f6985cbfc6…

MALICIOUS

Office (OLE) / .XLS

59.0 KB Created: 2020-04-22 04:43:55 Authoring application: Microsoft Excel
MD5: dbe9985f6fcf134088b633fc9ba0652e SHA-1: d9720c03936704b08eb909670c85fdaf554fc16a SHA-256: 099bc1f6985cbfc6945a597d51dd0adfe767917ef60719ba1df4bf5e130b79dd
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an Excel 4.0 macro sheet that is encrypted, indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. The presence of an auto-open macro (OLE_XLM_AUTOOPEN) suggests an attempt to automatically execute code when the spreadsheet is opened. The document body was unreadable, preventing further analysis of its specific lure 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.

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