MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File
The critical heuristic firing for CVE-2017-0199 indicates the document is designed to exploit a vulnerability in OLE2Link and URL Moniker to load remote content. The OOXML_ENCRYPTED_EXPLOIT_CARRIER_SHAPE heuristic further suggests this is an exploit carrier. The extracted URL is highly suspicious and likely points to the secondary payload. The document is encrypted with a default password, a common tactic to hinder analysis.
Heuristics 3
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OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199Document 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.URL https://n9.cl/fwnn7
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Default-encrypted OOXML exploit carrier layout high OOXML_ENCRYPTED_EXPLOIT_CARRIER_SHAPEDefault-password encrypted OOXML package contains embedded OLE object parts and additional activation/decoy parts. This layout is common in malicious Excel exploit delivery and requires inspecting the decrypted package.
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Office OOXML encrypted with default VelvetSweatshop password medium OFFICE_DEFAULT_PASSWORD_ENCRYPTED_OOXMLOLE EncryptedPackage decrypts with Excel's built-in VelvetSweatshop password. Office opens this transparently, and malware uses it to hide OOXML exploit parts from scanners that only inspect the outer OLE container.
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