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

Static analysis result for SHA-256 85842dfd7e468da7…

MALICIOUS

Office (OLE) / .XLS

444.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2024-06-11
MD5: 28127336f11129fd4a3af24e421efdb4 SHA-1: b6a789cadba7c9cc3c971bd9fc750d8374298085 SHA-256: 85842dfd7e468da7bbbf264bbeb6970839217dda53f10d1c436a7352933433c9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: Malicious File T1059.005 Command and Scripting Interpreter: Visual Basic

The critical heuristic firing for CVE-2017-0199 indicates the sample is designed to exploit this vulnerability via an OLE object to download a remote payload from the specified URL. Although no VBA code was extracted, the presence of the CVE-2017-0199 exploit and an embedded URL strongly suggests a downloader functionality.

Heuristics 4

  • 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.
  • ClamAV: Xls.Downloader.Trojan-aa0b8f388d8573cd-aa0b8f388d8573cd-9950439-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Trojan-aa0b8f388d8573cd-aa0b8f388d8573cd-9950439-0
  • 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://gf.to/ygLRcWQWW

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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