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

Static analysis result for SHA-256 5076d3967b43464d…

MALICIOUS

Office (OLE) / .XLSX

489.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: f4e5bd08e746421de95b317a43080db7 SHA-1: f8997db97b1799a0d517aede8eaed8239357ad93 SHA-256: 5076d3967b43464d02b838b30b974b544df9a2a7b64b0480c38cabf306c79309
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 download and execute a remote payload from a specified URL. The extracted URL is the primary indicator of the malicious payload's origin. No VBA macros were found to be executable, but the OLE structure 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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