Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e413f0b3c67bc5b5…

MALICIOUS

Office (OLE)

464.5 KB Created: 1997-01-08 22:48:59 Authoring application: Microsoft Excel
MD5: 3253025f69dcefd123d876e9fa6d703f SHA-1: 3ff42c18f4c316549b5eeb2d2f8047ceb1526b66 SHA-256: e413f0b3c67bc5b54aa5a590b5bb53f86cd2fce70ff79a3505fd6b078d80dadd
200 Risk Score

Malware Insights

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

The critical heuristic firing for Shell() call in VBA, combined with the Workbook_Open auto-execution, strongly indicates that the embedded VBA macro is designed to execute arbitrary commands. The presence of suspicious URLs suggests a download and execution chain for a second-stage payload. No document body text was available for further context.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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://kokuo.com/��
    • http://kokuo.com/A@`
    • http://www.vector.co.jp/soft/dl/win95/business/se391869.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
6b0027ac3438c65eee33d744318e17a30d6564efabca05ae382db91ae27fd666		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 169187 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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