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

Static analysis result for SHA-256 04dd3e36ee06b5ac…

MALICIOUS

Office (OLE) / .XLS

653.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: d5c0296562466d2f4a76a065bc3376e2 SHA-1: ee6f8ee9b3a2163c1350ca45b164c7b6e2b0f0df SHA-256: 04dd3e36ee06b5acf2613881f0fb156f6a7dc050982aa26490869710d362f0a9
70 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.005 Visual Basic

The critical heuristic firing indicates exploitation of CVE-2017-0199, which is used to download and execute a remote loader from the URL http://ir.cx/ikjVu. Although VBA macros are present, they do not contain executable statements, suggesting the exploit relies on the OLE object vulnerability rather than macro execution. The presence of the OLE2Link object and the embedded URL strongly support this attack pattern.

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://ir.cx/ikjVu

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