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

Static analysis result for SHA-256 4cf055d3a8ce7e88…

MALICIOUS

Office (OLE) / .XLSX

174.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-10-25
MD5: 914db2d12934ec83bff60abd6fdac823 SHA-1: 01f71f701f8cf01571603b41bc6c09030e8ba3cd SHA-256: 4cf055d3a8ce7e88354a688ae5ff9e2e36f468cf8e899dfc01ab72ecdc0e4b9c
70 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 OLE object, which attempts to load a remote document from the URL http://94.156.253.236/HTMLIECachesBrowser.dOC. Although no VBA code was found to be executable, the presence of the OLE object and the embedded URL strongly suggests a remote code execution attempt. The file is an Excel spreadsheet, likely used as a lure to trick users into opening it and triggering the exploit.

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://94.156.253.236/HTMLIECachesBrowser.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

Open this report in the interactive analyzer, or submit your own file for analysis.