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

Static analysis result for SHA-256 7abbe3f99f749abb…

MALICIOUS

Office (OOXML) / .DOC

58.6 KB Created: 2023-02-26 21:57:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2023-02-27
MD5: 926f9368c8ce5ec549671e86c800421c SHA-1: 9efe56506142dbbcd823fe615941f3c3cd37f0fa SHA-256: 7abbe3f99f749abb9130cea7644eb73da82a9173eb8dadc2bcc4cd68715ddc99
82 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The sample leverages the CVE-2017-0199 vulnerability, a known method for exploiting OOXML documents to load remote content. It attempts to download a DLL from 'https://www.mediafire.com/file/oqo5kcut0sy8hcq/excelDNALibrary-AddIn64-packed.xll' via an OLE object, and also references 'https://urlcallinghta.blogspot.com/atom.xml' which is associated with remote code execution. These indicators suggest the document is designed to download and execute a second-stage payload.

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/oqo5kcut0sy8hcq/excelDNALibrary-AddIn64-packed.xll
    • 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://urlcallinghta.blogspot.com/atom.xml

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