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

Static analysis result for SHA-256 e3e3a4dfe0546175…

MALICIOUS

Office (OLE) / .XLS

1.08 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 54588c7f7bcdf066ca0f030ad114c857 SHA-1: c5445efda27c666c128692ed90be5263652ad365 SHA-256: e3e3a4dfe0546175df5a6b788e771b6d2b18200d653f2e2093b2733600d241e8
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.005 Visual Basic

The critical heuristic firing indicates exploitation of CVE-2017-0199, which is a known vulnerability used for remote code execution. The exploit leverages a URL moniker to download a secondary payload from the provided URL. Although the VBA project itself contains no executable statements, the OLE structure is sufficient to trigger the exploit. The file is an Excel spreadsheet, suggesting a social engineering lure to entice the user to open it.

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.
  • 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.

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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