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

Static analysis result for SHA-256 be4d644175baadbc…

MALICIOUS

Office (OLE) / .XLSX

147.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-10-25
MD5: 04b4bc6ca23dcf641ffc95b32f16fa86 SHA-1: 39b92a99fc1494e77d2483dfe0b384ac3b361330 SHA-256: be4d644175baadbceacd9780f8233a6591f4290d9d27334fd7167861ab79fc64
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 attempts to load a remote document from the URL http://185.254.37.174/HTMLEVENbrowser.dOC. Although the VBA project itself contains no executable statements, the OLE structure facilitates the exploit. This indicates a likely downloader or dropper functionality.

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://185.254.37.174/HTMLEVENbrowser.dOC

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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