Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6143ab424487d458…

MALICIOUS

Office (OLE)

101.5 KB Created: 2018-05-28 10:30:00 Authoring application: Microsoft Office Word First seen: 2019-01-11
MD5: 8263c77790c30d38cee360fb4e06bf36 SHA-1: 9c878453d9e2305c10063b39e6142134ba42881f SHA-256: 6143ab424487d458f030c29fb160f7bfa2e60a93796071fa3c44e214f6f2c4bc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The file contains a legacy WordBasic auto-exec marker ('Autoopen') and evidence of p-code execution with an 'Shell' token, indicating an attempt to run arbitrary code. ClamAV detection confirms this as malware (Doc.Malware.Valyria-6735999-0). Although VBA extraction failed, the presence of these indicators strongly suggests the document is designed to download and execute a secondary payload.

Heuristics 5

  • ClamAV: Doc.Malware.Valyria-6735999-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-6735999-0
  • 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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