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

Static analysis result for SHA-256 c303ee2423cc33e6…

MALICIOUS

Office (OLE) / .XLSX

1.19 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: d511ae489cb9a0423d525f78caac4951 SHA-1: 6ae3db7ac95bdb8ccdde6f4d3ccedda5c482dba4 SHA-256: c303ee2423cc33e651ae0049dea314b05a96dd34e2bcdd0b0131dcfec1fb94a0
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 is designed to load remote content. The extracted URL is the likely source of the secondary payload. Although the VBA project contains no executable statements, the presence of the OLE object and the specific CVE exploit strongly suggest a remote code execution attempt.

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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