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

Static analysis result for SHA-256 835324b1d2833818…

MALICIOUS

Office (OLE) / .XLS

1.15 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 0b86273c13d780ff07c534123fa15d17 SHA-1: b51d1877a506368c87e5bfb4691927c796fae117 SHA-256: 835324b1d2833818886b859516324e5c275e17c21d1776f195e473f0323e0d00
70 Risk Score

Malware Insights

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

The file is an Excel spreadsheet that exploits CVE-2017-0199 via an OLE2Link object to download a remote payload from the URL 'https://greatdecentpeoplesgivenbestcreationeveremadewithnewkindofdocumentswhich.docx@grsh.link/NFJ4sm'. Although VBA macros were extracted, they contain no executable statements and appear to be boilerplate. The primary malicious functionality is driven by the CVE exploit.

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://greatdecentpeoplesgivenbestcreationeveremadewithnewkindofdocumentswhich.docx@grsh.link/NFJ4sm
    • 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/

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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