Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ffa4a48cd6693cae…

MALICIOUS

Office (OLE)

343.5 KB Created: 2020-07-21 07:21:33 Authoring application: Microsoft Excel First seen: 2020-09-15
MD5: de70b10f2b85c3d2f07fa7fcd005cc12 SHA-1: caa077e757cbb1b880858f9ec99d3c8f9d923f43 SHA-256: ffa4a48cd6693cae6ca39f57209792de03517fbc1840a94c1978d3fab5dccce4
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

Static analysis revealed an encrypted Excel 4.0 macro sheet, indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. The presence of an AUTOOPEN macro suggests an attempt to automatically execute code when the spreadsheet is opened. The document body was unreadable, preventing further analysis of its 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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