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

Static analysis result for SHA-256 d20120cc046cef3c…

MALICIOUS

Office (OOXML) / .DOC

9.9 KB Created: 2022-05-30 06:30:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2022-06-07
MD5: e7015438268464cedad98b1544d643ad SHA-1: 03ef0e06d678a07f0413d95f0deb8968190e4f6b SHA-256: d20120cc046cef3c3f0292c6cbc406fcf2a714aa8e048c9188f1184e4bb16c93
82 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample is a Microsoft Office document that leverages CVE-2021-40444 by including an external OLEObject. This technique is commonly used to download and execute arbitrary code from a remote source. The heuristic firings directly indicate the exploitation of CVE-2021-40444 and the presence of an external relationship pointing to http://185.234.247.119:80/123.RES, which is highly suspicious.

Heuristics 3

  • External OLEObject gadget — CVE-2021-40444 critical CVE exact CVE_2021_40444
    External relationship to mhtml:http://185.234.247.119:80/123.RES!http://185.234.247.119:80/123.RES — exploitable external OLEObject gadget pattern for CVE-2021-40444
  • External relationship medium OOXML_EXTERNAL_REL
    External target in word/_rels/document.xml.rels: mhtml:http://185.234.247.119:80/123.RES!http://185.234.247.119:80/123.RES
  • 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://185.234.247.119:80/123.RES!http://185.234.247.119:80/123.RES
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartex
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/drawing/2016/ink
    • http://schemas.microsoft.com/office/drawing/2017/model3d
    • 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/2018/wordml/cex
    • http://schemas.microsoft.com/office/word/2016/wordml/cid
    • http://schemas.microsoft.com/office/word/2018/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

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