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

Static analysis result for SHA-256 4ab56a1abbf6adc9…

MALICIOUS

Office (OOXML) / .DOC

886.1 KB Created: 2020-12-11 15:53:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 1edefac4bbbbd4659bc2b0546ec16825 SHA-1: 7603820ad35012cd406e2866eb9a23e83dc54699 SHA-256: 4ab56a1abbf6adc9c6e3e2444bf5807c5269309c8dfddd658d365d0d6f23e6d2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The sample is a malicious OOXML document that uses remote template injection and embeds an OLE object. The embedded OLE object and the remote template URL are strong indicators of a downloader or droppper functionality. The document body contains what appears to be a table of contents and a sidebar prompt, suggesting a lure to engage the user.

Heuristics 5

  • Remote template injection high OOXML_REMOTE_TEMPLATE
    Document references a remote template URL (http://res-backup.com/bin/3.dotm) — a common remote-template-injection vector used by Hancitor, Emotet and many phishing campaigns. Word can fetch and apply the remote template; macros in that template may execute depending on Office policy and trust state.
  • External relationship medium OOXML_EXTERNAL_REL
    External target in word/_rels/settings.xml.rels: http://res-backup.com/bin/3.dotm
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/photoshop/1.0/
    • http://www.iec.ch
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2012/wordml
    • http://schemas.microsoft.com/office/word/2015/wordml/symex
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
053a3f7e14d6e8f1eec1e4d92b73ed60e299c8f35137c40ce735e5cf41578656		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 455680 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.97, consistent with packed or encrypted content.
ooxml_oleobject_00_ole10native_00.bin
10ecaf3592fa6a09b3de80ccc8ed056a41b4f35cf9b35f4ec0ffcf2cdaf489ac		 ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 439116 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.
emf_00.emf
83c986b1bc409e50164565cedd1de32c11e847cf1e9ae18bb4209ca9ba2529ac		 ooxml-emf OOXML EMF part: word/media/image2.emf 10088 bytes

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