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

Static analysis result for SHA-256 9cf196c4f190f87d…

MALICIOUS

Office (OLE) / .XLSX

1.17 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 78be28f099fabbbd675937567919339c SHA-1: ae09d06552680bb86776f7b01fc48524f7d15342 SHA-256: 9cf196c4f190f87d7115277656ab4583ad3234dff5e015d99d79f4de6930eba0
68 Risk Score

Malware Insights

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

The sample is an OLE file that exploits CVE-2017-0199 via a URL moniker to load a remote resource. The extracted URL points to a suspicious domain and is likely the source of the secondary payload. No VBA macros were found to be executable, but the exploit itself is sufficient for initial compromise.

Heuristics 2

  • 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.

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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