Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 91f2044137428a3e…

MALICIOUS

Office (OOXML)

10.1 KB Created: 2018-03-07 09:39:00 UTC Authoring application: Microsoft Office Word 12.0000
MD5: 26be021f0a980f4f623c0c42eb2d22e0 SHA-1: 2c9d65d2affd770412187a3943414d7e47aa8ac5 SHA-256: 91f2044137428a3eb71275b72752a9b0a00cee1b4945ddfc64bbd410f7d9cb5f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is an OOXML document that exhibits remote template injection and external relationship heuristics, both pointing to the URL https://hiokurl.com/ApjVL. This suggests the document is designed to download and execute a secondary payload from this external source. The ClamAV detection as 'Doc.Downloader.Redline-9972754-0' further supports its role as a downloader.

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://hiokurl.com/ApjVL) — 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://hiokurl.com/ApjVL
  • 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://hiokurl.com/ApjVL
    • 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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