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

Static analysis result for SHA-256 fc49f63b65f6ec54…

MALICIOUS

Office (OLE) / .XLSX

1.17 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: dad37e3090b45447788f8175d0d25a67 SHA-1: be59341ac2a206ddc30a67bdb8951a792a690b96 SHA-256: fc49f63b65f6ec5493e8ac495c22e1ac56ced2531cdbe24c37be758723695c53
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: Malicious File T1059.005 Command and Scripting Interpreter: Visual Basic

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which attempts to load a remote resource. The extracted URL is the primary indicator of the malicious payload's origin. Although the VBA project contains source code, it does not contain executable statements, suggesting the exploit relies on the OLE vulnerability rather than macro execution.

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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