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

Static analysis result for SHA-256 50218f194be32da5…

MALICIOUS

Office (OLE) / .XLS

3.95 MB Created: 2010-02-03 09:01:57 Authoring application: Microsoft Excel
MD5: 041f0f084ee7a08ee3616f9041e4f443 SHA-1: 76360d4a59aa714a7d847486efe49ebaea780b49 SHA-256: 50218f194be32da5be2d34649f9114bec0a96b49e6315ff91d2d47c8cff069f4
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File

The file contains legacy Excel 4.0 (XLM) macros, indicated by the OLE_XLM_AUTOOPEN and OLE_XLM_LEGACY_MACRO_VIRUS heuristics. These macros are designed to download and execute a second-stage payload from the URLs http://150.1.154.4/My and http://150.1.154.4/WINDOWS\TEMP\ME-08-P.xls. Although VBA macros are present, they contain no executable statements, suggesting the primary malicious functionality resides within the XLM macros.

Heuristics 4

  • 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.
  • Excel 4.0 (XLM) Auto_Open + macro sheet high 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.
  • VBA project contains no executable statements low OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
  • 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://150.1.154.4/My
    • http://150.1.154.4/WINDOWS\TEMP\ME-08-P.xls

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
63a2e15f033a67d9ad16642d9c6b6d7f322e2e127de587618e34746664bf1957		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1506 bytes

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