Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 845bdad86f39c23e…

MALICIOUS

Office (OLE) / .XLS

892.0 KB Created: 2009-09-04 05:05:56 Authoring application: Microsoft Excel
MD5: 8fb9e3ef22158c281169af1bbdcbc3c6 SHA-1: e1452eabdf6cbf6605875ae34052bf55ed09ac70 SHA-256: 845bdad86f39c23e9c9667da18117967206ed55e009332fc5ac12e90018932f0
182 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an Excel 4.0 macro-enabled workbook containing legacy macro virus markers and an Auto_Open function. The macros are designed to hide workbook sheets and include logic for copying the infected file, indicating a self-propagation attempt. The embedded URL is referenced by the macro, suggesting it may be used for payload delivery or command and control.

Heuristics 4

  • XLM Auto_Open workbook with payload URL or enable-content lure critical OLE_XLM_AUTOOPEN_PAYLOAD_LURE
    Workbook contains an Excel 4.0 macro sheet with Auto_Open / Auto_Close and also exposes a payload URL or enable-content lure in the OLE bytes. This combination is a high-confidence XLM downloader/social-engineering pattern even when formula recovery cannot decode the full macro chain.
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://lgekrhqms35.lge.com/Documents

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