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

Static analysis result for SHA-256 c5548defceff8b67…

MALICIOUS

Office (OLE) / .XLSX

1.37 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 2955e18273fbdcfa7c4ecc36d87369a2 SHA-1: 21722a9717eb87ed989332a2e4e9aabbc165f804 SHA-256: c5548defceff8b67cb5b120eb5ce33eb97ab0956c45d13e9783573c3deee2441
60 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object. This technique is used to download and execute a remote payload from the provided URL. The embedded URL is the primary indicator of compromise, likely serving as the initial stage for a secondary payload. No scripts were extracted from this sample.

Heuristics 2

  • 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.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/exif/1.0/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://www.extensis.com/meta/FontSense/
    • http://ns.adobe.com/photoshop/1.0/

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