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

Static analysis result for SHA-256 e4db7df3f7d9cd96…

MALICIOUS

Office (OLE) / .XLSX

881.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 06618933e6efdddeea385d41483bfba8 SHA-1: 7885503a276d3f460a1c41a166813a30711e045f SHA-256: e4db7df3f7d9cd9634ceb577dc3d5995139e6cceba6cfc9af74c04756aa86a1d
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, which attempts to load a remote resource from the URL https://peprolinbot.es/wmQjoU. Although the VBA project itself contains no executable statements, the presence of the OLE2Link object and the associated URL strongly suggest that this document is designed to act as a loader for a secondary malicious payload. The file is an Excel spreadsheet, and the exploit targets a vulnerability in how Office applications handle OLE objects.

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://schemas.openxmlformats.org/drawingml/2006/main

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