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

Static analysis result for SHA-256 992df82cf31a91ac…

MALICIOUS

Office (OOXML) / .DOC

71.6 KB Created: 2022-02-01 04:47:00 UTC Authoring application: 16.0000 First seen: 2022-02-16
MD5: 4d01975268c215fc26ed79ebd17ec22d SHA-1: 64c6752af3632f6f49fd6db091182e753e5d9f80 SHA-256: 992df82cf31a91acd034411bb43a1ec127fa15d613b108287384882807f81764
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell T1105 Ingress Tool Transfer

The sample is an OOXML document containing an embedded OLE object. Heuristics indicate this object is a script dropper that downloads and executes a payload from the URL https://cdn.discordapp.com/attachments/932413459872747544/938291977735266344/putty.exe. The embedded payload is identified as a risky executable file. The document body appears to be a lure, possibly related to official communications, to trick the user into opening the malicious content.

Heuristics 4

  • Ole10Native package payload is a download-and-execute script critical OFFICE_PACKAGE_SCRIPT_DROPPER
    The OLE Package's embedded payload contains a script that hosts a shell (PowerShell/WScript/mshta), fetches a remote resource, and executes it — a download-and-run dropper. Embedding such a script inside an Office document via the Object Packager is a direct user-execution delivery technique (MITRE T1204.002), not a benign attachment.
  • Ole10Native package drops an auto-executable payload critical OFFICE_PACKAGE_RISKY_FILE
    OLE Package displayName or fullPath ends in a directly auto-executable extension (a runnable binary or a script the default shell host runs on double-click). Embedding such a payload inside an Office document has no benign authoring use — it is a malware-delivery dropper.
  • 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 https://cdn.discordapp.com/attachments/932413459872747544/938291977735266344/putty.exe
    • 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
    • http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/iX/1.0/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
131722bb8405d06b4102febee95b22429e1a67d7cc98cdaaddd8fba8a7bc7a18		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject3.bin 10240 bytes
ooxml_oleobject_00_ole10native_00.bin
8e2046758b783e41bf06829f15e414277ac18c4d761a605419cf59df0ee9031e		 ole-package OOXML word/embeddings/oleObject3.bin Ole10Native stream: Ole10Native 864 bytes
emf_00.emf
27f73c111b924fdde231b3b61cb92bce7015eb0b6deb7b70964ff7bdc08e942a		 ooxml-emf OOXML EMF part: word/media/image2.emf 7456 bytes

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