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

Static analysis result for SHA-256 7aa0283f48d2dbd4…

MALICIOUS

Office (OLE) / .XLSX

836.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2026-03-02
MD5: f3b9177572e58b9e9728051bc720d14d SHA-1: ab4506d13075eae1be429b99886f0dc6abf82bfd SHA-256: 7aa0283f48d2dbd405611cb22567d9f168b781824e09533c92902099938d4f2b
70 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing indicates exploitation of CVE-2017-0199, which is used to download and execute a remote payload from the provided URL. Although VBA macros are present, they do not contain executable statements, suggesting the exploit relies on the OLE2Link 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://0025475341724/9999999999.php

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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