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

Static analysis result for SHA-256 305c497c168f5c6a…

MALICIOUS

Office (OLE) / .XLSX

847.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: d3d74f167db1c69b173f6e20ee95db63 SHA-1: fab867db5d76cd7df0986ed5254c8884588a90e3 SHA-256: 305c497c168f5c6a1360022f4b97aabc17fa54734b1843c586321fb9a5105683
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, which attempts to load a remote resource from the provided URL. Although the VBA project itself contains no executable statements, the exploit mechanism is clearly defined by the heuristic. The extracted URL is the primary indicator of compromise, likely serving as a distribution point for a second-stage payload.

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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