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

Static analysis result for SHA-256 725b064b6c147eea…

MALICIOUS

Office (OLE) / .XLSX

555.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 41b8340efc8d51b8a7254b9a86d33e31 SHA-1: 01a38b98ef1b7e3538366fbaefd9d66816fac725 SHA-256: 725b064b6c147eea4e11238bc5285d7db77e581775c68e781f2be9745cc51091
70 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.005 Visual Basic

The critical heuristic firing indicates exploitation of CVE-2017-0199, which is used to download and execute a remote loader from the URL https://zhort.de/suMIIV. Although VBA macros are present, they do not contain executable statements, suggesting the exploit is leveraged directly. The presence of the OLE2Link and URL Moniker stream further supports this attack vector.

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 https://zhort.de/suMIIV

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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