Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 782c3251d8277616…

MALICIOUS

Office (OLE)

181.5 KB First seen: 2019-04-17
MD5: 14ae40167613453420b17fa80e291fa4 SHA-1: 52146ebd9367eb42c52ffdea04d5d2d5bec88611 SHA-256: 782c3251d8277616f6f3d791af04e27b9423c8df0b53ed2abe386540bdff5bd0
64 Risk Score

Malware Insights

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

The sample is a malicious OLE file containing a high-severity heuristic firing for a VBA p-code auto-exec macro with execution tokens, specifically the AutoOpen function which also uses Shell. Although VBA extraction failed, the presence of the AutoOpen marker and the Shell execution token strongly suggests the macro attempts to execute arbitrary commands. This is consistent with a macro-based downloader.

Heuristics 4

  • 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://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)

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