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

Static analysis result for SHA-256 3833142e8b5a9174…

MALICIOUS

Office (OOXML) / .DOC

23.0 KB Created: 2022-08-18 16:37:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2022-09-02
MD5: 15b691f0c5d627e71fed8a5d34fb0328 SHA-1: 1c7cb38d8fc2f01a6331ade0fdf4cb9779a5ae74 SHA-256: 3833142e8b5a9174615c83c1165fa67bd9f46a230058adf8fc9cbb081bb92d30
142 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

The file is identified as malicious due to critical heuristic firings indicating the exploitation of CVE-2021-40444. This exploit leverages an external OLEObject to load a malicious mhtml resource from the provided URL. The embedded URL is the primary indicator of compromise, likely serving as the initial stage for delivering a secondary payload.

Heuristics 4

  • External OLEObject gadget — CVE-2021-40444 critical CVE exact CVE_2021_40444
    External relationship to mhtml:https://qaz.im/load/diy5AH/b6d42680-56fd-4f98-ae0e-ff81e3799df6!x-usc:http — exploitable external OLEObject gadget pattern for CVE-2021-40444
  • ClamAV: Doc.Exploit.CVE-2021-40444-9891698-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.CVE-2021-40444-9891698-2
  • External relationship medium OOXML_EXTERNAL_REL
    External target in word/_rels/document.xml.rels: mhtml:https://qaz.im/load/diy5AH/b6d42680-56fd-4f98-ae0e-ff81e3799df6!x-usc:https://qaz.im/load/diy5AH/b6d42680-56fd-4f9
  • 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://qaz.im/load/diy5AH/b6d42680-56fd-4f98-ae0e-ff81e3799df6!x-usc:http
    • https://qaz.im/load/diy5AH/b6d42680-56fd-4f98-ae0e-ff81e3799df6!x-usc:https://qaz.im/load/diy5AH/b6d42680-56fd-4f98-ae0e-ff81e3799df6
    • https://qaz.im/load/diy5AH/b6d42680-56fd-4f98-ae0e-ff81e3799df6!x-usc:https://qaz.im/load/diy5AH/b6d42680-56fd-4f9
    • 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.microsoft.com/office/2019/extlst
    • 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/2020/wordml/sdtdatahash
    • 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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