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

Static analysis result for SHA-256 f8bfbbc7c1156606…

MALICIOUS

Office (OLE) / .XLS

706.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 587edd113fe36b3dbb4ade1eea6ec641 SHA-1: 8838f7c585afd3fe6130e91844bf53c0f0a86454 SHA-256: f8bfbbc7c1156606fba8fb13003d71ac8273a9ec621e4cce0ad5b3f32fc41b42
70 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 via an OLE2Link object, which is designed to download and execute a remote payload from the URL https://ccurl.xyz/769O. Although the VBA project itself contains no executable statements, the OLE structure is sufficient to trigger the exploit. The file is therefore acting as a loader for a secondary malicious payload.

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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