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

Static analysis result for SHA-256 57caa0626b9e752a…

MALICIOUS

Office (OLE) / .XLSX

170.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2024-08-18
MD5: 64c78508c2d5ee0170fe6f0a5538bde3 SHA-1: e96bdf0aa8aa24c83564afb8206a8dd69639d16b SHA-256: 57caa0626b9e752a236dd3eaf35409d371a5a5698c0419d77bebf9b76cf59881
70 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 provided URL. The VBA macros are present but do not contain executable statements, suggesting they are not the primary execution vector. The embedded URL is the most critical indicator for the next stage of the attack.

Heuristics 3

  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jio.cx/RjyXye

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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