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

Static analysis result for SHA-256 20960d5327f45bdc…

MALICIOUS

Office (OLE) / .XLSX

1.17 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: fffa3c88bdb9f50095adaacad4c97adb SHA-1: cd441e1cfec6345f5e9939b598b8432e7c15c17e SHA-256: 20960d5327f45bdcd54e300dd76e530f577df540a1f5f11360cc71e9e6b465d0
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, a known vulnerability for remote code execution. The exploit leverages a URL moniker to fetch a secondary payload from 'https://loooooooooooooooooooog.com/F2zxuDC'. Although the VBA project itself contains no executable statements, the presence of the OLE2Link object and the associated URL strongly suggest a malicious intent to download and execute arbitrary code.

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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