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

Static analysis result for SHA-256 f1ad3a22a9234150…

MALICIOUS

Office (OLE) / .XLSX

681.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2024-06-11
MD5: f40b66b96a052c413e36f01af1ff319c SHA-1: defca2fb7bc151546bae1e4031417bd7204764c5 SHA-256: f1ad3a22a923415051e1d65947e181d31f8c2842a9aa0f2ea6b180a4d2f62086
70 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1059 Command and Scripting Interpreter T1059.005 Command and Scripting Interpreter: Visual Basic

The file exploits CVE-2017-0199, a known vulnerability for remote code execution, by leveraging a URL moniker to download a secondary payload from http://gf.to/hSwSnAFmc. Although the VBA project itself contains no executable statements, the exploit mechanism is clearly indicated by the heuristic firing. This suggests the file acts as a downloader for further malicious activity.

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 http://gf.to/hSwSnAFmc

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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