Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 12735482351d0b7b…

MALICIOUS

Office (OOXML)

13.2 KB Created: 2013-10-31 15:25:00 UTC Authoring application: Microsoft Office Word 15.0000 First seen: 2021-11-24
MD5: 95e86f13ad08cbf7653ca14ee01a9496 SHA-1: ca9a468ca020b40cf3e4e9f82700ddd5d3426929 SHA-256: 12735482351d0b7b5018f46f78b124c2c0c39a8a3479c44e73f646ce1bb49f95
282 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is identified as malicious due to critical heuristic firings related to CVE-2017-0199 and CVE-2022-30190, indicating exploitation of known vulnerabilities in Microsoft Office. These heuristics point to an external OLE object relationship that attempts to load content from 'http://tigerdrill.xyz/EYWCET97LV2U.html'. This mechanism is commonly used to download and execute a second-stage payload, likely leading to further compromise.

Heuristics 7

  • 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.
  • MSHTML-style external object relationship critical CVE related OFFICE_MSHTML_EXTERNAL_OBJECT
    External relationship to http://tigerdrill.xyz/EYWCET97LV2U.html!x-usc:http://tigerdrill.xyz/EYWCET97LV2U — exploitable MSHTML/CAB/MHTML/HTA-style Office attack surface
  • 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: Doc.Exploit.CVE-2021-40444-9891698-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.CVE-2021-40444-9891698-2
  • 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.
  • External relationship medium OOXML_EXTERNAL_REL
    External target in word/_rels/document.xml.rels: NULL
  • 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://tigerdrill.xyz/EYWCET97LV2U.html!x-usc:http://tigerdrill.xyz/EYWCET97LV2U.html OOXML external relationship
    • http://tigerdrill.xyz/EYWCET97LV2U.html!x-usc:http://tigerdrill.xyz/EYWCET97LV2UOOXML external relationship
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvasOOXML external relationship
    • http://schemas.openxmlformats.org/markup-compatibility/2006OOXML external relationship
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsOOXML external relationship
    • http://schemas.openxmlformats.org/officeDocument/2006/mathOOXML external relationship
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingOOXML external relationship
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingOOXML external relationship
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainOOXML external relationship
    • http://schemas.microsoft.com/office/word/2010/wordmlOOXML external relationship
    • http://schemas.microsoft.com/office/word/2012/wordmlOOXML external relationship
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupOOXML external relationship
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkOOXML external relationship
    • http://schemas.microsoft.com/office/word/2006/wordmlOOXML external relationship
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeOOXML external relationship

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