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

Static analysis result for SHA-256 7b0011ee840ffbc4…

MALICIOUS

Office (OLE) / .XLS

185.0 KB Created: 2020-10-19 23:28:50 Authoring application: Microsoft Excel
MD5: 3c6238501ffbb4f1334e2bd82698b2fe SHA-1: 8595bb9776f8dc31324f707e269678c82a3abb71 SHA-256: 7b0011ee840ffbc4e54c4d677e59ed5598814b9c2062b785e969385144b5e8a9
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file is an Excel 4.0 macro sheet, identified as encrypted and containing an auto-open macro. This suggests the primary function is to execute arbitrary code upon opening, typical of macro-based malware. The lack of readable document body text or scripts prevents a more detailed analysis of the payload or specific attack vector.

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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