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

Static analysis result for SHA-256 b8618bdd3c9997c6…

MALICIOUS

Office (OLE) / .XLSX

1.06 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 935764fa28852107de1eb3156ccb56f8 SHA-1: 82dc9647b8e12b8fe72dc4d71afcfffef621491a SHA-256: b8618bdd3c9997c6d11c63e1b90864c82a33b01641c6a84b0e6f2db4b962cd39
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 explicitly identifies the exploit and the URL used to download the secondary payload. Although the VBA project itself contains no executable statements, the exploit mechanism is embedded within the OLE structure, indicating a malicious intent to load external content.

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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