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

Static analysis result for SHA-256 87b72675e8a62457…

MALICIOUS

Office (OLE) / .XLSX

746.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 9c597c391eb1f5c78686b73bdff0a109 SHA-1: 73fa891fe4fde5972bdd61c7a52a87834ea6b255 SHA-256: 87b72675e8a624573c91488e43fd04dc3489d1bc3c614271ab7e0561bee49f68
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 loader. The embedded URL is the primary indicator for the second-stage payload. No VBA macros were found to be executable, suggesting the exploit is directly leveraged.

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 http://000032441063426/0000001.pHp#000003712146143000003712146143000003712146143

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