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

Static analysis result for SHA-256 17e4445ed19c35c7…

MALICIOUS

Office (OLE) / .XLSX

1.14 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: fe9774651d3067a54cee9b53bc68b6ed SHA-1: c5c30f51ee9822e1569c6ef2f221068f145c48a5 SHA-256: 17e4445ed19c35c715f094a3f05833607dc704a754385f84e5be50c25a67fa5b
70 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing indicates exploitation of CVE-2017-0199, which is used to download and execute a remote loader. The embedded URL is the primary indicator for the second-stage payload. No VBA macros were found to be executable, suggesting the exploit is directly leveraged.

Heuristics 3

  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://go.sunrek.org/NSsQYn?&coliseum=omniscient&dagger=bitter&model

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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