Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 182b2e77fd427efe…

MALICIOUS

Office (OLE)

246.0 KB Created: 2020-09-14 21:28:14 Authoring application: Microsoft Excel
MD5: c6ca732e3b969f57cdbe29498779af69 SHA-1: ca407c60819e4f12f840c99803df5b2f475921a5 SHA-256: 182b2e77fd427efe6480f01e4868a72d2e8eb2e63ab5c1f573c66d590f60dba1
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an Excel file identified as containing an encrypted Excel 4.0 macro sheet. This type of macro is often used to download and execute malicious payloads. The presence of an encrypted macro sheet and the 'AUTOOPEN' heuristic strongly suggest malicious intent, likely for initial execution of a secondary stage.

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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