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

Static analysis result for SHA-256 e1893c8444c92bc2…

MALICIOUS

Office (OLE) / .XLSX

197.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: d45a991ded2ef8cbc00237750bb78f62 SHA-1: e0c7b4d08d6a6115e30cea9296e7313b0a969dba SHA-256: e1893c8444c92bc22d6fa14e153343ab08279ba6f6e1405b181f96bccd194f90
68 Risk Score

Malware Insights

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

The sample is an OLE file that exploits CVE-2017-0199, a known vulnerability for remote code execution. The heuristic firing indicates that the file attempts to load a remote resource from the URL 'https://ubal.do/kcn3Yw'. Although the VBA project contains no executable statements, the exploit itself is sufficient to indicate malicious intent. The file is likely a downloader for a second-stage 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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