Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 450b65a3bb7a28c4…

MALICIOUS

Office (OLE)

161.0 KB Created: 2021-01-15 17:38:53 Authoring application: Microsoft Excel
MD5: e88fdb597a983317ebe4ad915cb337b2 SHA-1: 4497fed6b02be06596a27e8d9e0fb5031d53f2a3 SHA-256: 450b65a3bb7a28c469dc30984f606c28c6f212095c9dd90bb49b2d008e9684ab
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 auto-open macro (OLE_XLM_AUTOOPEN) suggests it is designed to execute automatically upon opening. The document body is heavily corrupted and unreadable, providing no further context on the specific lure or 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.

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