MALICIOUS
202
Risk Score
Malware Insights
MITRE ATT&CK
T1204 Malicious Link
T1204.001 Malicious Link: User Execution
T1059 Command and Scripting Interpreter
T1071 Application Layer Protocol
T1071.001 Application Layer Protocol: Web Protocols
The sample is a password-encrypted Office document identified by ClamAV as Xls.Downloader.94c25b356b5a6cac-9978798-0. It exploits CVE-2017-0199 via an embedded OLE object to download a second-stage payload from the URL https://khaurl.com/kFrmd?&sign=direful&strap=combative&sheet=abandoned&knee=sincere&shopping=great&rail=dizzy&meeting=blue&cirrus. The document's encrypted nature and the exploit carrier heuristic indicate it is designed to deliver malware.
Heuristics 6
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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.
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ClamAV: Xls.Downloader.94c25b356b5a6cac-9978798-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Xls.Downloader.94c25b356b5a6cac-9978798-0
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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 document is password-encrypted medium OFFICE_ENCRYPTED_PACKAGEOLE container holds MS-OFFCRYPTO encrypted package (Standard Encryption (Office 2007, AES)).
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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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Embedded URL info EMBEDDED_URLOne 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 https://khaurl.com/kFrmd?&sign=direful&strap=combative&sheet=abandoned&knee=sincere&shopping=great&rail=dizzy&meeting=blue&cirrus
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