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

Static analysis result for SHA-256 ef30b686955d11c9…

MALICIOUS

Office (OLE) / .XLS

184.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-10-10
MD5: 871a1bb5da74f0a5b7facc79ba2abfe3 SHA-1: 9eb6be3e283f4e456c877c9625881794a4eb4139 SHA-256: ef30b686955d11c92ab89e6c5c5e4e61fc3d9797aca3d16d3011a1a6474847a6
62 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The sample leverages the CVE-2017-0199 vulnerability, which is a known method for remote code execution. It attempts to download a secondary payload from the embedded URL http://23.95.106.3/479/qw/0iuoioooUIOIOiiiu0u0uioiui0iuiooi0i0u0##################################0iuI00UIuoioioU00I0uiuiuiuIUIUiuiu000###################000.dOC, indicating a downloader or dropper functionality.

Heuristics 2

  • 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.
  • 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://23.95.106.3/479/qw/0iuoioooUIOIOiiiu0u0uioiui0iuiooi0i0u0%23%23%23%23%23%23%23%23%23%23%23%23%23%230iuI00UIuoioioU00I0uiuiuiuIUIUiuiu000%23%23%23%23%23%23%23%23%23%23%23%23%23%23000.dOC