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

Static analysis result for SHA-256 5e456b83214c397a…

MALICIOUS

Office (OLE) / .XLSX

1.06 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 0dcc7e4e72aa06224271760b51256d98 SHA-1: 92476d4cf3c8feb873750293677e9be36fbb29e7 SHA-256: 5e456b83214c397a524374434907fcba95d0beaa60d5b62b277037fcbeebdd9d
70 Risk Score

Malware Insights

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

The sample contains a critical heuristic firing for CVE-2017-0199, indicating it attempts to exploit this vulnerability to load a remote resource. The embedded URL, https://kryx.ru/QMSJEd?&hydrogen=zany&writing=loutish, is likely the source of the secondary payload. Although VBA macros are present, they do not contain executable statements, suggesting the exploit is directly leveraged by the OLE object rather than through macro execution.

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://kryx.ru/QMSJEd?&hydrogen=zany&writing=loutish

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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