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

Static analysis result for SHA-256 d106446ba75a9d36…

MALICIOUS

Office (OLE) / .XLSX

1.25 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: e3afcc72b9f65030bcee289cda558807 SHA-1: 2de4b10d11a2741ffa6c3943433184caa9eef6d2 SHA-256: d106446ba75a9d3612477acd3ef7c5c5b172709196d6e2962ecfabfb10e04132
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 used to load remote content, as evidenced by the extracted URL. The VBA macro, while not containing executable statements directly, is part of the exploit chain. The file's purpose is to act as a loader for a secondary malicious 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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