Malicious Office (OOXML) / .DOC — malware analysis report

Static analysis result for SHA-256 b5cd4d2483b1809d…

MALICIOUS

Office (OOXML) / .DOC

10.4 KB Created: 2023-02-24 05:23:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2023-02-24
MD5: 0f13233fd5065012d52aaddca75ce3ad SHA-1: 7d28f509c9e0bd4dfebc5b3432016a3e2f619f86 SHA-256: b5cd4d2483b1809db9ad22bf252f0d73f44e89256055abd0a39be4e2e14da598
82 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious File T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell T1190 Exploit Public-Facing Application

The sample is an OOXML document that leverages CVE-2017-0199 to load an external OLE object from the URL https://urlintimacygoomb.blogspot.com/atom.xml. This technique is commonly used to download and execute a secondary payload, such as an XLL file hosted on services like MediaFire. The embedded URL and the nature of the exploit strongly suggest a downloader or initial access mechanism.

Heuristics 3

  • OOXML OLE2Link remote loader — CVE-2017-0199 related high CVE related CVE_2017_0199_RELATED
    Document contains an o:OLEObject Type=Link whose external oleObject relationship points to a remote URL. This is the OOXML OLE2Link activation shape associated with CVE-2017-0199 delivery, but the local file does not expose URL Moniker bytes or a weaponized extension/content type, so the exact CVE cannot be proven statically.
  • External OLE object relationship high OOXML_EXTERNAL_OLE_OBJECT
    Document contains an oleObject relationship whose target is an external HTTP(S) URL. Office resolves this through OLE/object update paths rather than as a normal user-clicked hyperlink.
  • 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 https://www.mediafire.com/file/myv87yle174zkkr/excelDNALibrary-AddIn-packed.xll/file
    • https://www.mediafire.com/file/6zyaz4ypgd7vllk/excelDNALibrary-AddIn64.xll/file
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2006/wordml
    • https://urlintimacygoomb.blogspot.com/atom.xml

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