Win.Trojan.Kop-4 — Office (OLE) malware analysis

Static analysis result for SHA-256 df172c3dbcbb582a…

MALICIOUS

Office (OLE)

17.5 KB Created: 1998-12-22 19:28:00 Authoring application: Microsoft Word for Windows 95 First seen: 2012-06-14
MD5: f9da111c86f30f210fbb69dddced66af SHA-1: 511d7f6509de3995b5f1ce1171d5c000411eb8ea SHA-256: df172c3dbcbb582a0adc03e2301779b8252265f41867bf6253a3b2eaf875eced
80 Risk Score

Malware Insights

Win.Trojan.Kop-4 · confidence 90%

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

The file is detected as Win.Trojan.Kop-4 by ClamAV. A legacy WordBasic auto-exec macro marker 'AutoOpen' was found, indicating that the macro will execute automatically upon opening the document. The document body text is a lure for a fictional application called 'Notespad', attempting to trick the user into engaging with the malicious content.

Heuristics 2

  • ClamAV: Win.Trojan.Kop-4 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Kop-4
  • 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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