Sload — Office (OLE) malware analysis

Static analysis result for SHA-256 e1b5cc47eeb4c946…

MALICIOUS

Office (OLE)

115.2 KB Created: 2018-10-02 18:52:00 Authoring application: Microsoft Office Word First seen: 2018-10-19
MD5: 98e4982938e175b6053f25ed532e2984 SHA-1: a029f2ead4b2d142b663afac657d1282721f2706 SHA-256: e1b5cc47eeb4c946e9bff94aa4c2eb546a6717a6ea5541dc63615543d34f4ad0
84 Risk Score

Malware Insights

Sload · confidence 90%

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

The file is detected as malicious by ClamAV with the signature Doc.Downloader.Sload-6827538-0, indicating it belongs to the Sload family. A legacy WordBasic auto-exec macro marker (AutoOpen) was found, suggesting an attempt to execute malicious code upon opening. Although VBA macros could not be extracted, the presence of the auto-exec marker and the ClamAV detection strongly imply a downloader functionality.

Heuristics 4

  • ClamAV: Doc.Downloader.Sload-6827538-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Sload-6827538-0
  • 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
    olevba could not extract VBA macros (AssertionError); format-agnostic byte-level scans still ran. Likely legacy, encrypted, or malformed OLE/OOXML — re-scanning the same bytes will yield the same outcome.
  • 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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