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

Static analysis result for SHA-256 0258852ec9494dee…

MALICIOUS

Office (OLE) / .XLS

1.05 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 8f93cd036519dfe81051773c2bab728d SHA-1: 5c385b174cde8a0b74552870a3e2be6a319d76bb SHA-256: 0258852ec9494dee60cd3e06e1d8311dd2e536e26e6d9f65a51b613387750dcd
70 Risk Score

Malware Insights

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

The sample is an Excel file that exploits CVE-2017-0199 via an OLE2Link object to download a second-stage payload from the URL http://nx.ax/7Ej. Although VBA macros are present, they do not contain executable statements, indicating the exploit relies on the OLE vulnerability rather than macro execution. The embedded URL is the primary indicator of the malicious payload's origin.

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://nx.ax/7Ej

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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