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

Static analysis result for SHA-256 715092d1e4ccbe8c…

MALICIOUS

Office (OLE) / .XLS

1.24 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: c17da974d8f81e1c6952fabb2c5f3357 SHA-1: 4e0c28d37aca6eb59575dad54eedefe1f9cc6327 SHA-256: 715092d1e4ccbe8ce5da70031613d17116d3a0fd7b94126364b2ba9d92899f5b
70 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which attempts to load a remote resource from the provided URL. This suggests the file acts as a downloader for a secondary malicious payload. No VBA macros were found to be executable, but the OLE structure itself is the vector for exploitation.

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://kutt.ar-email.com.br/42na3t?&ride=noisy&marble

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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