Redline — Office (OOXML) / .DOC malware analysis

Static analysis result for SHA-256 eb76a1b7832ebb4b…

MALICIOUS

Office (OOXML) / .DOC

10.1 KB Created: 2018-03-07 09:39:00 UTC Authoring application: Microsoft Office Word 12.0000
MD5: b64114610fa9833da2970e53887cfe9f SHA-1: 9ff5cb5d8ef730f8a0f1ccbd8d22b96b37271b8e SHA-256: eb76a1b7832ebb4b67c30832f0c918b8dd4762a4a4a632740e19e91a6f271ac8
122 Risk Score

Malware Insights

Redline · confidence 90%

MITRE ATT&CK
T1218.005 Signed Binary Proxy Execution: Visual Basic Application T1027 Obfuscated Files or Information T1204.002 User Execution: Malicious File T1218

The sample is a malicious OOXML document that utilizes remote template injection via the URL https://toui.cc/ydu. ClamAV has specifically identified this file as Doc.Downloader.Redline, indicating that the payload delivered via the template is likely the Redline Stealer. The lack of a script section indicates that the payload execution logic is contained within the remote template rather than the same file.

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/ydu) — 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/ydu
  • 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/ydu
    • 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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