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

Static analysis result for SHA-256 312bcc1afef695c0…

MALICIOUS

Office (OLE) / .XLSX

1.15 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: d084c7572eab1482f00202d132bce8d9 SHA-1: 78c0e2d568b92a0feb62e65daaec31a93a1e25f6 SHA-256: 312bcc1afef695c007187b5b5bed190961ecd68e08d4a55079eea0823540ff58
68 Risk Score

Malware Insights

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

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which is designed to download and execute a remote payload from the specified URL. Although the VBA project contains no executable statements, the OLE object itself is the exploit vector. The extracted URL is the primary indicator of compromise.

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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