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

Static analysis result for SHA-256 fc6a9b001b8b0743…

MALICIOUS

Office (OOXML) / .DOC

14.9 KB Created: 2022-05-31 06:41:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2022-08-17
MD5: 14aff46aaffbad783974ba819dba6e41 SHA-1: 56951a72b332163d916046dd9c38e402f0ccd470 SHA-256: fc6a9b001b8b07437b221d70343259d51a6ec580c625be1648e3f6acf09146fc
222 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The file is identified as malicious due to critical heuristic firings related to CVE-2017-0199 and CVE-2022-30190 (Follina), indicating the exploitation of vulnerabilities via an embedded OLE object. The embedded OLE object points to the URL http://coolrat.xyz/Loading.html, which is likely used to download and execute a second-stage payload. The document body contains Chinese text advertising services related to online gambling, stock trading, and other potentially illicit activities, suggesting a lure for users to open the malicious document.

Heuristics 6

  • CVE-2022-30190 — Follina stage-1 external HTML oleObject critical CVE likely CVE_2022_30190
    External OLEObject relationship targets a remote .html with the Follina delivery shape (oleObject -> HTTP(S) HTML with trailing Moniker '!'). In live Follina samples the ms-msdt: trigger is served by the remote HTML, not the document itself.
  • 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.
  • ClamAV: Win.Exploit.CVE_2022_30190-9951234-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Exploit.CVE_2022_30190-9951234-1
  • 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://coolrat.xyz/Loading.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
5f5e9f0ae88c06e81cc34c036bf40fc37f1257bed7b72474108d29b62f9f06e8		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 111104 bytes
ooxml_oleobject_00_ole10native_00.bin
46c738c59278047c7aa84ce1914147af0147735d8bb3fe973eb143e57e66fea5		 ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 107428 bytes

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