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

Static analysis result for SHA-256 f5ec77c5ef4b176a…

MALICIOUS

Office (OLE) / .XLSX

296.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 3e3b3fd7c7b3272acba3987ca8c25e62 SHA-1: aa870c0a968f1926b37eb270bb166775977e54a7 SHA-256: f5ec77c5ef4b176a58b3f883859ade0960137eed6f2ba4dcc4c44ae36a2d5aa0
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 load remote content. The embedded URL 'https://jamp.to/UKEsns' is highly suspicious and likely serves as the initial download source for a secondary payload. Although no VBA code was directly executed, the presence of a VBA project suggests potential for macro-based execution, which is often used in conjunction with such exploits.

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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