Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 4a82da8dab375ae4…

MALICIOUS

Office (OLE)

11.5 KB Created: 1996-10-06 11:51:00 Authoring application: Microsoft Word for Windows 95 First seen: 2012-06-14
MD5: 362f22d882af61c9b5b1d7dcebfe9d07 SHA-1: 41fbed2ec65c688e2b20667d86de45253bce4129 SHA-256: 4a82da8dab375ae460570b322c6c6ff443bc34bee566c118416afb77bdbf3b73
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file contains a legacy WordBasic AUTOOPEN macro, indicated by the OLE_LEGACY_WORDBASIC_AUTOEXEC heuristic. This macro is designed to execute automatically when the document is opened, suggesting an attempt to deliver a malicious payload. The ClamAV detection further confirms its malicious nature. The presence of AUTOOPEN implies an initial access vector via spearphishing attachment.

Heuristics 2

  • ClamAV: Win.Trojan.Twno-5 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Twno-5
  • 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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