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

Static analysis result for SHA-256 06dce6347439b75a…

MALICIOUS

Office (OLE) / .XLS

45.5 KB Created: 2020-10-30 09:00:49 Authoring application: Microsoft Excel
MD5: 6ed8d1de6a501018ef0340b2e37ea332 SHA-1: a0f4d13aa61bae022b12da878c8f8a0dbaa5b9e0 SHA-256: 06dce6347439b75a3b1e2714e3c9a136e3bec6010bd62031296244014b72c805
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 intent to automatically execute code when the file is opened. Without further deobfuscation or script content, the exact payload and delivery mechanism remain unclear.

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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