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

Static analysis result for SHA-256 8deea2151b6a92dc…

MALICIOUS

Office (OLE) / .XLSX

220.5 KB Created: 2020-10-01 02:51:46 Authoring application: Microsoft Excel
MD5: 57196503df38aafec780d8fe8fe8a001 SHA-1: 7683dca3d7c4487a3af513939c34e162d5547b94 SHA-256: 8deea2151b6a92dc013da792ed6e2be65e74224e452eb9f9070adcf8304a6bc4
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an encrypted Excel 4.0 macro sheet, indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. The presence of an AUTOOPEN macro suggests it attempts to run automatically upon opening. The document body is heavily obfuscated and truncated, preventing a detailed analysis of its specific intent or payload. However, the core functionality appears to be macro execution for delivering a secondary 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.