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

Static analysis result for SHA-256 9a5cb8fcb528bbbb…

MALICIOUS

Office (OLE) / .XLS

1.04 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 9665cc9d79c04f75ccf1be7b9a06647d SHA-1: d9a93dcb558a24869c9bbf96e142dee3940a9620 SHA-256: 9a5cb8fcb528bbbbf5f5afafb79430e0e7b355a3d39a9f890a5c1a25624fd531
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 attempts to load a remote resource. The extracted URL is the primary indicator of compromise. Although VBA macros were present, they contained no executable statements, suggesting the exploit is delivered through the OLE object itself rather than macro execution.

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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