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

Static analysis result for SHA-256 fd60aaaac26e6506…

MALICIOUS

Office (OLE) / .XLSX

213.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: c42970e3e90b3d0fc55932afafc0ef2b SHA-1: 19fa440c79317b5675a7a7b26afb3377ecc3df66 SHA-256: fd60aaaac26e65067050cea8a90a4ede9989ce86ef3bdb2ac358ac6bc9754b5e
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 Service Execution: Visual Basic

The critical heuristic firing indicates exploitation of CVE-2017-0199 via OLE2Link and URL Moniker, which is a known technique for downloading and executing remote content. The extracted URL is highly suspicious and likely serves as the source for the secondary payload. Although VBA macros were present, they contained no executable statements, suggesting the exploit is delivered through the OLE object itself rather than macro code.

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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