Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 469a22bf6829bac8…

MALICIOUS

Office (OLE)

3.13 MB Created: 2010-02-02 09:42:43 Authoring application: Microsoft Excel
MD5: 407d59d51ff91950af0c9a573339e7af SHA-1: a6d0b9901af615e49bb2b137e389d492156efdbb SHA-256: 469a22bf6829bac81d0191fab623c889b45961d263b655e08313e2f4c053fb7f
128 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1566.001 Spearphishing Attachment

The file contains critical XLM macro virus markers, indicating it is a legacy macro virus. The Auto_Open macro is present and uses the SAVE.COPY.AS function to create a copy of itself with a date-stamped filename, such as 'LuuNgayDD-MM-YYYY.xls'. This behavior suggests an attempt to spread or persist by creating new infected copies. The 'SE_INVOICE_LURE' heuristic further suggests a potential lure, though no specific text was extracted to confirm this.

Heuristics 3

  • Excel 4.0 (XLM) Auto_Open + macro sheet critical OLE_XLM_AUTOOPEN
    Workbook contains an Auto_Open / Auto_Close defined name together with an Excel 4.0 macro sheet — the canonical XLM auto-execution shape used by malware families such as Emotet and QakBot.
  • Legacy XLM macro-virus family marker critical OLE_XLM_LEGACY_MACRO_VIRUS
    Workbook contains an Excel 4.0 macro Auto_Open chain and legacy macro-virus family strings. This is a narrow indicator for infected XLM workbooks rather than ordinary formula use.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators

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