Redline Stealer — Office (OOXML) / .DOC malware analysis

Static analysis result for SHA-256 e9f0bbe9fd157b2e…

MALICIOUS

Office (OOXML) / .DOC

10.1 KB Created: 2018-03-07 09:39:00 UTC Authoring application: Microsoft Office Word 12.0000
MD5: 4ebdccbd7b606db3e6cbf0395069c8c8 SHA-1: b424e0e593b5f75ac7486777c6a8da052f2e1af2 SHA-256: e9f0bbe9fd157b2e8e5a48e366905afaee0c6c9021b2d71ba3ba4c3b3b853be1
122 Risk Score

Malware Insights

Redline Stealer · confidence 90%

MITRE ATT&CK
T1218.003 System Binary Proxy Execution: SharePoint T1027 Obfuscated Files or Information T1204.002 User Execution: Malicious File T1059 Command and Scripting Interpreter

The sample is a Word document that utilizes remote template injection via the URL https://toui.cc/NwN to bypass traditional static analysis and fetch a malicious template. This behavior is explicitly flagged by ClamAV as Doc.Downloader.Redline, indicating the delivery of the Redline Stealer. The remote template serves as the same mechanism for executing the same second-stage payload.

Heuristics 4

  • ClamAV: Doc.Downloader.Redline-9972754-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Redline-9972754-0
  • Remote template injection high OOXML_REMOTE_TEMPLATE
    Document references a remote template URL (https://toui.cc/NwN) — a common remote-template-injection vector used by Hancitor, Emotet and many phishing campaigns. Word can fetch and apply the remote template; macros in that template may execute depending on Office policy and trust state.
  • External relationship medium OOXML_EXTERNAL_REL
    External target in word/_rels/webSettings.xml.rels: https://toui.cc/NwN
  • 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://toui.cc/NwN
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2006/wordml

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