Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 70ef7a7f59633343…

MALICIOUS

Office (OLE)

46.5 KB Created: 2015-01-19 13:05:00 Authoring application: Microsoft Office Word First seen: 2015-03-15
MD5: cbe78f1b5cc67bd972b2db7629d80001 SHA-1: 52b57695529f6d15d8e4c90a8e8dfe5c1a262584 SHA-256: 70ef7a7f59633343ac0b77b988f18419a6fd5f302b61ba1b241854d06a4906b5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample is identified as malicious by ClamAV and exhibits characteristics of a dropper. A legacy WordBasic 'autoopen' macro is present, which is configured to execute code via 'CreateObject'. While VBA extraction failed, the presence of the auto-exec marker and the 'CreateObject' call strongly suggest the intent to download and execute a secondary payload from the embedded URL. The URL itself was flagged as confirmed benign, but this is likely due to its static nature and not indicative of the payload it would have served.

Heuristics 5

  • ClamAV: Doc.Dropper.Agent-6412232-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6412232-1
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • 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.
  • Unsupported Office format for VBA extraction info OFFICE_FORMAT_UNSUPPORTED
    The Analyzer could not extract VBA macros: the document may be legacy, encrypted or malformed.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://hoodoba.cba.pl/js/bin.exe� In document text (OLE body)

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