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

Static analysis result for SHA-256 9d5bf5b952303b55…

MALICIOUS

Office (OLE) / .XLSX

314.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: b0f43c950bad027f4b1f301f3c7bc167 SHA-1: 5be9f7b0571afbb609a716f182cd7d920833f723 SHA-256: 9d5bf5b952303b55df2262c80220d05479971894fbfcc22b4bb129c3218984ed
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 Service Execution: Visual Basic

The critical heuristic firing indicates exploitation of CVE-2017-0199, which is a known vulnerability used to download and execute remote content. The extracted URL is highly suspicious and likely serves as the payload source. Although VBA macros were present, they contained no executable statements, suggesting the exploit is directly embedded within the OLE structure.

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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