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

Static analysis result for SHA-256 54451239a4aed110…

MALICIOUS

Office (OLE) / .XLSX

1.04 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 14133e8bfba49d1294b9a77de28a6fa8 SHA-1: c4c303af18f1ecbfdd42b23377f38f3e1946458b SHA-256: 54451239a4aed110bd174af183f53992f5727bd203b41ea2fa8cfac0f8fdf30f
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 download and execute a remote payload from the provided URL. Although VBA macros were present, they contained no executable statements, suggesting the exploit relies solely on the OLE vulnerability. The extracted URL is the primary indicator for the second-stage 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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