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

Static analysis result for SHA-256 3f2db9052f37fc8e…

MALICIOUS

Office (OLE) / .XLSX

209.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 039a9de07bd8b4f6f6e932ee65d1d63d SHA-1: 99403912a0f8f3b390a6851da91fb2968fd9ad69 SHA-256: 3f2db9052f37fc8ed4872c2f36cf487d695d1662b74f61e982120eda93f77f87
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 the provided URL. The VBA macros, while not containing executable statements directly, are part of the exploit chain. The extracted URL is the primary indicator for the 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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