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

Static analysis result for SHA-256 ecc360802ade998b…

MALICIOUS

Office (OLE) / .XLSX

1.12 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: f871e42b797cf70e3ee4a79e21f02197 SHA-1: b03ebab29eab8c27f1a814494953147a9b90322f SHA-256: ecc360802ade998b33380472d1b5ce4dc95e4039daf93123ba3885e2716dc012
68 Risk Score

Malware Insights

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

The sample is an OLE file that fired a critical heuristic for CVE-2017-0199, indicating it attempts to exploit this vulnerability. The heuristic also extracted a URL, which is likely used to download a secondary payload. No VBA macros were found to be executable, but the presence of the CVE exploit and the extracted URL strongly suggest a remote code execution and download attack pattern.

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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