Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 fe2feb8104493650…

MALICIOUS

Office (OLE)

14.5 KB Created: 1997-09-22 16:16:00 Authoring application: Microsoft Word for Windows 95 First seen: 2012-06-14
MD5: cecb092df01b5b593fe1c1c76969b24c SHA-1: abec547d8b5b631d7354b91c9c75684d936ab0e5 SHA-256: fe2feb8104493650bcb7ee8a393edf8521448407d7068e847929e59e75845550
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is a legacy Word document containing WordBasic macros, indicated by the OLE_LEGACY_WORDBASIC_AUTOEXEC heuristic firing on the AutoClose marker. The extracted document body reveals numerous macro commands like KillRep and KillFiles, suggesting an intent to delete files or manipulate the system. The presence of legacy auto-exec macros points towards a malicious intent, likely to execute arbitrary commands or delete files upon opening.

Heuristics 2

  • ClamAV: Win.Trojan.KillLuf-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.KillLuf-1
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.

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