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

Static analysis result for SHA-256 c391b81586137c44…

MALICIOUS

Office (OLE) / .XLSX

1.24 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: d6e987444c4db25f0f398f036f583dca SHA-1: 5d6170a51f539e0cd87d0b1a01e70ab01bd12439 SHA-256: c391b81586137c44bd20e90b160daf7faa3ef7e351e2ab9f29266844d35c24c7
68 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. This technique is commonly used to download and execute a second-stage payload from a remote URL. The extracted URL, https://cpbr.link/QfXMm4?&stockings, is highly suspicious and likely serves as the distribution point for the malicious payload. Although the VBA project contains no executable statements, the OLE object itself is the vector for exploitation.

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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