Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 19edc556845d56f0…

MALICIOUS

Office (OLE)

11.0 KB Created: 1995-12-01 18:06:00 Authoring application: Microsoft Word for Windows 95 First seen: 2012-06-14
MD5: c1029ff32fe4af3aa11d20998b6cc486 SHA-1: 5758bfa91c0cfd56351c27d7099ca1e238a83ac8 SHA-256: 19edc556845d56f0e10e30f1e51a3921f556fcd59d528475e3858f7d915f1493
80 Risk Score

Malware Insights

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

The sample is an OLE file containing legacy WordBasic macros, specifically an AutoOpen macro, which is a strong indicator of malicious intent. The presence of the 'Win.Trojan.Wazzu-26' ClamAV detection further supports this. The AutoOpen macro is likely designed to execute automatically when the document is opened, facilitating the download and execution of a secondary payload.

Heuristics 2

  • ClamAV: Win.Trojan.Wazzu-26 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Wazzu-26
  • 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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