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

Static analysis result for SHA-256 c810a7800ef73b31…

MALICIOUS

Office (OOXML) / .DOC

122.5 KB Created: 2023-03-09 22:53:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2023-03-10
MD5: 7ef9162b0a6b549a08dee6fcd4ddc8fc SHA-1: e85dde4b5961a46f3a5933544c654a8c9f745cbd SHA-256: c810a7800ef73b31ff80c0ccd7b81c911e622d42d9ba5d86381e60287147f8f0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.005 PowerShell

The sample contains an embedded OLE object that leverages CVE-2017-0199 to fetch a secondary payload from the URL https://urlcallinghta4.blogspot.com/atom.xml. The embedded VBA macro project also points to https://powpowpowffs2.blogspot.com/atom.xml, indicating a downloader mechanism designed to retrieve and execute further malicious content.

Heuristics 5

  • 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.
  • Embedded Office object carries macros critical OFFICE_EMBEDDED_MACRO_OBJECT
    This document embeds a second Office file that itself contains a VBA macro project or an Excel 4.0 (XLM) macro sheet. Hiding a macro-bearing workbook or document inside another document — frequently under an obfuscated, non-standard part name — is a macro-smuggling technique that defeats scanners which only inspect the outer document's macro storage. No benign authoring workflow stages a hidden macro project this way.
  • 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 OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • 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://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://urlcallinghta4.blogspot.com/atom.xml
    • https://powpowpowffs2.blogspot.com/atom.xml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
48ee0c3c3b615e2e0e2f72d55f68cdbf46b9289f033544270f0605ceee487613		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/1.--- 16237 bytes

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