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

Static analysis result for SHA-256 3722989fb37d2b30…

MALICIOUS

Office (OLE) / .XLS

186.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 6586786ff2d63581546545fe37f711db SHA-1: 227eef347b15fe072cbf41c49a42d4d9f6bb4888 SHA-256: 3722989fb37d2b30e4e04404660ee6757fe8dc872540ddf57e5c04b8f6307315
60 Risk Score

Malware Insights

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

The critical heuristic firing indicates the exploitation of CVE-2017-0199 via an OLE2Link object. This vulnerability is used to download and execute a remote loader from the URL http://hop.fyi/r1FbC. The file is an Excel spreadsheet, suggesting a macro-based or exploit-based delivery mechanism.

Heuristics 1

  • 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.