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

Static analysis result for SHA-256 244ef4d9586c9001…

MALICIOUS

Office (OOXML) / .DOC

10.1 KB Created: 2018-03-07 09:39:00 UTC Authoring application: Microsoft Office Word 12.0000
MD5: f901087f008f239a3bafb0b075c23480 SHA-1: c3e5bd0721eade0a50701973f09d1790702e0f93 SHA-256: 244ef4d9586c9001fd5b4bcffdfe88ad195e6deebbfe3545ad7ec93ff0e978b2
122 Risk Score

Malware Insights

RedLine Stealer · confidence 90%

MITRE ATT&CK
T1218.010 Signed Binary Proxy Execution: Remote Template Injection T1566.001 Phishing: Spearphishing Attachment T1027 Obfuscated Files or Information

The sample uses a remote template injection technique to fetch a content file from https://bitestan.com/c4fxhTcO, bypassing traditional macro-based detection. The ClamAV detection specifically identifies this as a downloader for RedLine Stealer, which is consistent with this delivery mechanism.

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://bitestan.com/c4fxhTcO) — 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://bitestan.com/c4fxhTcO
  • 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://bitestan.com/c4fxhTcO
    • 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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