Malicious Office (OLE) / .XLSX — malware analysis report

Static analysis result for SHA-256 fbca7bc0eeb96c76…

MALICIOUS

Office (OLE) / .XLSX

109.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2024-07-01
MD5: 2e031d091acee967e8ae9fdb9bbb83fe SHA-1: 31e029605ada12ea168d4f5da2966a4db6958e3d SHA-256: fbca7bc0eeb96c760cb962baf39b6bbf9c277f9377c668fb2136df06b267f74f
70 Risk Score

Malware Insights

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

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to download and execute a remote payload from the specified URL. The VBA macros are present but appear to contain no executable statements, suggesting the primary malicious functionality is within the OLE object itself. The embedded URL is the highest priority IOC.

Heuristics 3

  • OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199
    Document contains an embedded OLE link object whose URL Moniker points to a remote URL. When the host file is opened, Office follows the link, downloads the URL, and processes the response based on its Content-Type (HTA -> mshta.exe, RTF → Word, etc.) — the documented CVE-2017-0199 primitive. The URL extension is not a reliable filter; servers can return different payloads to Office's user agent.
  • VBA project contains no executable statements low OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
  • 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://woi.gg/1v6uTh

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes

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