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

Static analysis result for SHA-256 7909a4673bccb471…

MALICIOUS

Office (OLE) / .XLS

147.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-10-25
MD5: bdaf0ebe82efae3c5f73be7b71403518 SHA-1: dbe84b60b4b8879b0b6c1d10393c1511bb83b7a0 SHA-256: 7909a4673bccb4713ea284ab3de8112a326e0176387cb4bd88689f4dfb649e26
70 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.005 Visual Basic

The sample is an Excel file that exploits CVE-2017-0199 via an OLE2Link object to download a secondary payload from the URL http://192.3.64.154/windows/whs/HTMLcacheIEsession.dOC. Although VBA macros were extracted, they contain no executable statements, indicating the exploit relies on the OLE vulnerability itself rather than macro execution. The file's purpose is to act as a remote loader for further malicious activity.

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://192.3.64.154/windows/whs/HTMLcacheIEsession.dOC

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