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

Static analysis result for SHA-256 06fe1295e799d02c…

MALICIOUS

Office (OOXML) / .XLSX

1.45 MB Created: 2005-04-09 08:34:04 UTC Authoring application: Microsoft Excel 14.0300 First seen: 2022-09-23
MD5: 4362838bbce0147b109d33e2c8a8fab0 SHA-1: 0c61ef20573043650d5e11dc1e8e48d0430e610e SHA-256: 06fe1295e799d02c61a2bde2e64c7a24144c34b0d8459b8c5e169b75d242b1c2
270 Risk Score

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • 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.
  • 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 project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present
  • Hidden worksheet (hidden) low OOXML_HIDDEN_SHEET
    Excel workbook contains 1 hidden sheet(s) — hidden sheets are commonly used to conceal macro code, staging data, or intermediate payload construction
  • Large OOXML part skipped info SCAN_INCOMPLETE
    One or more high-value OOXML parts exceeded the scanner's per-entry size cap and may not have been fully inspected.

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