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

Static analysis result for SHA-256 b846a72f2f901047…

MALICIOUS

Office (OLE)

15.0 KB Created: 1996-09-01 09:04:00 Authoring application: Microsoft Word 6.0 First seen: 2012-06-14
MD5: 52668663f0a34ea6f2c5bcb2c9f39aff SHA-1: cd8dd1c3eba7a81e6f4a99c740a293a272a95fb0 SHA-256: b846a72f2f901047042c017a467eb80cffc84925456647e56d8799362fe13645
80 Risk Score

Malware Insights

Win.Trojan.Smiley-4 · confidence 90%

MITRE ATT&CK
T1059.005 Visual Basic

The file is identified as malicious by ClamAV with the signature Win.Trojan.Smiley-4. It contains legacy WordBasic macros, specifically an AutoOpen macro, which is a known indicator of malicious activity. The macros display environmental awareness messages but also contain commands that attempt to format the C: drive, indicating a destructive intent.

Heuristics 2

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