Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 e994224b9318b2a7…

MALICIOUS

Office (OOXML)

10.1 KB Created: 2018-03-07 09:39:00 UTC Authoring application: Microsoft Office Word 12.0000
MD5: 007b07e9a594fa36da4cbd4b5263ad7d SHA-1: a2f83af2390707c41451f1ea6dd3b8e309acb348 SHA-256: e994224b9318b2a7746f89f5b774dfbf8872a0b36988a81e95488f6a0b34526c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample exhibits critical heuristic firings for remote template injection and external relationships, both pointing to the URL http://www.5z8.info/cockfights_e9g5fw_aryanbr0ther00d. ClamAV detection as Doc.Downloader.Redline-9972754-0 further confirms its malicious nature as a downloader. The embedded URL is likely used to fetch and execute a secondary 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 (http://www.5z8.info/cockfights_e9g5fw_aryanbr0ther00d) — 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: http://www.5z8.info/cockfights_e9g5fw_aryanbr0ther00d
  • 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://www.5z8.info/cockfights_e9g5fw_aryanbr0ther00d
    • 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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