Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3f23cb5ccee02a83…

MALICIOUS

Office (OLE)

144.0 KB First seen: 2019-05-10
MD5: c6d964f9fa4c86135871b2e08e7053c2 SHA-1: 9c8a8ee6da98580f9abc7608e101ca156cf72f05 SHA-256: 3f23cb5ccee02a8349eed26ea43d25831d4a276ae43cb751a89001534cb27692
124 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is identified as malicious by ClamAV and exhibits characteristics of a dropper. A legacy WordBasic auto-exec macro named 'Autoopen' was detected, which is configured to execute a shell command. Although VBA extraction failed, the presence of the auto-exec marker and the execution token strongly suggests the document's intent is to download and execute a secondary payload.

Heuristics 5

  • ClamAV: Doc.Dropper.Agent-6538764-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6538764-0
  • 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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