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

Static analysis result for SHA-256 754c716769375bce…

MALICIOUS

Office (OLE) / .XLSX

1.23 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 6ad78df7705ee835a2f3eaa6e4567e62 SHA-1: 15860b71e1f2c99214b28abdd5b05f74f3ccb0be SHA-256: 754c716769375bcea59d91849845d648881b192c821641d51fae073734c3a8e8
70 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.005 Visual Basic

The sample exploits CVE-2017-0199, a known vulnerability for remote code execution, by leveraging a URL moniker to download a secondary payload from the external URL https://al4.dev/pBwhlR. Although the VBA macros themselves contain no executable statements, the core exploit mechanism is present and active. This indicates a downloader or dropper functionality designed to fetch and execute further malicious content.

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://al4.dev/pBwhlR

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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