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

Static analysis result for SHA-256 a62333d6e3145e93…

MALICIOUS

Office (OLE) / .XLSX

1.18 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 4bf7cb0181edf161b32fa1c81cef0081 SHA-1: fbd0bf79cd12e32caa382bac83bb179c949683f4 SHA-256: a62333d6e3145e93a2ad5e795a6fde5872c49842cfbe10390485e7248ea9322f
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 via an OLE2Link object. This technique is used to load remote content, as evidenced by the extracted URL. The VBA project contains no executable statements, suggesting the exploit is directly embedded within the OLE structure rather than executed via macro code. The primary intent is to download and execute a second-stage payload from the provided URL.

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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