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

Static analysis result for SHA-256 c40a7c9d5947d7b4…

MALICIOUS

Office (OLE) / .XLSX

1021.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 6083d179790656af0b031d43b27cc479 SHA-1: 31f78c96b9024208225e98f3faa00ab24db66e9a SHA-256: c40a7c9d5947d7b4d632241d32f805d5315c042b8f0b79822975b10f965af406
60 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The critical heuristic firing indicates the exploitation of CVE-2017-0199 via an OLE2Link object. This vulnerability is used to load a remote resource from the URL http://tny.wtf/ET. The exploit likely serves as a loader for a second-stage payload, leading to a malicious outcome.

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.

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