Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 437d298a395d9452…

MALICIOUS

Office (OLE)

158.5 KB Created: 1999-04-03 18:49:00 Authoring application: Microsoft Word for Windows 95 First seen: 2012-06-14
MD5: 5cca03cbaafb1f4f8a641499252747f8 SHA-1: cbe28f6f28867632adc6de51050f13564dbd444c SHA-256: 437d298a395d9452955d1e9301fc00fc6a51cc84f5b697c57106ea80e3b0f2bc
80 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file is identified as a legacy WordBasic auto-exec macro marker, specifically 'AutoClose', and is detected by ClamAV as Win.Trojan.MWVCKA-1. The document body explicitly describes itself as a 'Macro Word Virus Construction Kit' for Word 6.0 & 7.0, detailing its purpose to generate source code for macro virii. It lists several common macro virus names and infection routines like AutoOpen, AutoNew, AutoClose, AutoExec, and FileSaveAs, indicating its function is to create and spread malicious macros.

Heuristics 2

  • ClamAV: Win.Trojan.MWVCKA-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.MWVCKA-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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