Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 db59fbb3b3ff84c2…

MALICIOUS

Office (OLE)

49.0 KB Created: 2015-01-13 05:17:00 Authoring application: Microsoft Office Word First seen: 2015-06-23
MD5: 6ef2ff81e9ed4b874aee49d8e5ae13f2 SHA-1: 95e790daf3d6d9f6173328c12f08330dd52d483b SHA-256: db59fbb3b3ff84c2b5345e28eeb3f0bce449fa6e81a4e8db7cb803bd7feadb6d
204 Risk Score

Malware Insights

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

The file is a malicious Office document that uses a "Content Hidden. Please enable Macros." lure to prompt the user to enable macros. The presence of legacy WordBasic auto-exec markers and VBA p-code auto-execution with execution tokens indicates that the document is designed to run malicious code upon opening. The heuristic for URLDownloadToFile API suggests the macro likely downloads a second-stage payload.

Heuristics 7

  • ClamAV: Doc.Dropper.Agent-5494487-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-5494487-0
  • Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD
    Reference to URLDownloadToFile API
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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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