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

Static analysis result for SHA-256 56c652846740fbdd…

MALICIOUS

Office (OLE) / .XLS

59.0 KB Created: 2020-04-27 23:19:44 Authoring application: Microsoft Excel
MD5: 980f336fa0cfce062d02a097daa2f38f SHA-1: b192a0d63dc8d3550fb2a4b90de0d736186770a5 SHA-256: 56c652846740fbdd2d0e534cb756fff4715baf813ef49b514624fc7708e64521
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications

The sample is an encrypted Excel 4.0 macro sheet, indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. This type of file is often used as a loader for other malicious payloads. No specific IOCs were extracted, and the document body was unreadable.

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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