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

Static analysis result for SHA-256 7479a3b015ea5010…

MALICIOUS

Office (OLE) / .XLSX

1.04 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: f70e63b415e06294c4a4d0297166ae32 SHA-1: 34b45ced7f155ec3c5f835a1cba69f0fc83660eb SHA-256: 7479a3b015ea50100be27c4bda29ec946f21448cbdbf0f1f1eab4aa30168ada5
70 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing indicates exploitation of CVE-2017-0199, which is used to download and execute a remote payload from the provided URL. Although VBA macros are present, they do not contain executable statements, suggesting the exploit relies on the OLE object vulnerability itself. The embedded URL is the primary indicator of compromise.

Heuristics 3

  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://link.saja.market/l33LNEfFvd?&candidate=blushing&august=royal&manx

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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