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

Static analysis result for SHA-256 898393252986f98c…

MALICIOUS

Office (OLE) / .XLSX

248.0 KB First seen: 2026-05-14
MD5: 8fc431ff8d79b3255f5e6809946a76dc SHA-1: 33b2344e90f4ddee8a4a247c86e5df88f774e9f6 SHA-256: 898393252986f98c477f3a14b7edab93ec3bff05dc395f357aff1fbe3d6476f5
142 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is an Office document encrypted with a default password, indicating it's likely an exploit carrier. It contains an embedded OLE object that exploits CVE-2017-0199, a known vulnerability for remote code execution. This exploit attempts to download a secondary payload from the URL http://wsdy1scmtonhumanrightjusticeorganizatin.duckdns.org/receipt/invoice_100470.doc, which is then likely executed on the victim's machine.

Heuristics 5

  • 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.
  • Default-encrypted OOXML exploit carrier layout high OOXML_ENCRYPTED_EXPLOIT_CARRIER_SHAPE
    Default-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.
  • Office document is password-encrypted medium OFFICE_ENCRYPTED_PACKAGE
    OLE container holds MS-OFFCRYPTO encrypted package (Standard Encryption (Office 2007+, AES-128)).
  • Office OOXML encrypted with default VelvetSweatshop password medium OFFICE_DEFAULT_PASSWORD_ENCRYPTED_OOXML
    OLE 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.
  • Embedded URL info EMBEDDED_URL
    One 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 http://wsdy1scmtonhumanrightjusticeorganizatin.duckdns.org/receipt/invoice_100470.doc In document text (OLE body)

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