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

Static analysis result for SHA-256 d6ef63cd2f25cf3a…

MALICIOUS

Office (OLE) / .XLS

172.5 KB Created: 2020-11-10 04:28:45 Authoring application: Microsoft Excel
MD5: 3a153e34c8c13466acd9423de22377ee SHA-1: 95af02011e099c2a9a426ae7cfe97a57476045a1 SHA-256: d6ef63cd2f25cf3a23571c8867e35aa9e083427bbd3b8b374bfc87f349141881
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 and OLE_XLM_AUTOOPEN heuristics. This suggests the file is designed to execute arbitrary code upon opening. No document body or script content was available for further analysis, limiting the ability to determine the specific payload or attack goal.

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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