Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 cb670101e6346aea…

MALICIOUS

Office (OLE)

70.5 KB Created: 2020-04-15 05:50:52 Authoring application: Microsoft Excel First seen: 2020-07-24
MD5: ccc9d40f5b95fef3543c918949fb8bbf SHA-1: 15b594c8812108064a46a40a6145df0d04f58368 SHA-256: cb670101e6346aea625395fc844cf1ee7c7b0fd98c0979863eaa4ccf030b0d57
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file is an Excel 4.0 macro sheet, identified by heuristics indicating encrypted macros and an auto-open macro. The presence of these elements strongly suggests an attempt to execute arbitrary code upon opening the document. The document body was unreadable, preventing further analysis of 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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