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

Static analysis result for SHA-256 cf8cc209c6c40d92…

MALICIOUS

Office (OLE) / .XLSX

556.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: a0c3d3af99b479f21522bc3d78ae1390 SHA-1: 28a8e1a60fc9f50818b3be7ebe14f0f9f90e8921 SHA-256: cf8cc209c6c40d925749964c61eb7619796edba2679565f2cde0193af24d3f20
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.005 Visual Basic

The sample exploits CVE-2017-0199, a known vulnerability for remote code execution via OLE2Link and URL Moniker. The heuristic explicitly points to a remote loader and provides a URL for the payload. No VBA macros were found to be executable, but the exploit itself is sufficient to indicate malicious intent. The primary IOC is the URL used to fetch the secondary 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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