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

Static analysis result for SHA-256 64c6ba33444e5db3…

MALICIOUS

Office (OLE) / .XLSX

141.5 KB Created: 2006-09-28 05:33:49 Authoring application: Microsoft Excel
MD5: 716c3aa1e0da98b6e99cadd60363ae7e SHA-1: 094623e555e4d525293ae7fa240bc445a3fbcecd SHA-256: 64c6ba33444e5db3cc9c99613d04fd163ec1971ee5eb90041a17068e37578fc0
300 Risk Score

Heuristics 7

  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • ClamAV: Doc.Downloader.EmotetExcel02226-9938630-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetExcel02226-9938630-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7cae011969aa9023a96862024ae54721dc634690f8d21045a624f9f2ddcc442e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4177 bytes

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