Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b230464e26518591…

MALICIOUS

Office (OLE)

11.0 KB Created: 1997-12-31 17:52:00 Authoring application: Microsoft Word for Windows 95 First seen: 2012-06-14
MD5: f235d178a01aae5a0a1b4e04086edc58 SHA-1: 3fcc74d4faac1da58b63620a02f6b14432056cab SHA-256: b230464e265185914fe4a997f9d7a698591794ecc6612052f4b2332d342a8116
80 Risk Score

Malware Insights

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

The sample contains a legacy WordBasic AutoClose macro, a known indicator of malicious documents. The macro is likely intended to execute malicious code upon opening or closing the document, as suggested by the 'AutoClose' marker and the 'Win.Trojan.Nop-4' ClamAV detection. The document body contains text that appears to be part of the macro's execution flow, including a message indicating infection by 'TAOA II'.

Heuristics 2

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