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

Static analysis result for SHA-256 8dfea58eea7906bf…

MALICIOUS

Office (OLE) / .XLSX

1.25 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: a27d1e1401cabff239b2d2551d077749 SHA-1: 5554700e3675e627e03260f54440ce893be0eeff SHA-256: 8dfea58eea7906bf9409e200c2ee293875d4389f6a15934fd7a03d15f0fbc12d
60 Risk Score

Malware Insights

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

The sample is an OLE2Link file that exploits CVE-2017-0199. This vulnerability allows the file to act as a remote loader, downloading and executing a second-stage payload from the URL "https://kryx.ru/z3JrPl?&astronomy=powerful". The exploit leverages URL Moniker functionality to achieve this.

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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