Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 a19116c601c222bc…

MALICIOUS

Office (OOXML)

10.1 KB Created: 2018-03-07 09:39:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2021-06-13
MD5: f1a569e8c8b115d248c4777af072160e SHA-1: 7d8c138a21650787c57c8d34faa91c59c4ead7eb SHA-256: a19116c601c222bc2ac6fdb93b19c4179fd86508e54a5ea8b12ada263919a954
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file exhibits critical heuristic firings indicating remote template injection and external relationships, both pointing to a malicious URL. ClamAV identifies the file as a downloader, likely associated with the Redline family. The embedded URLs suggest an attempt to fetch and execute a secondary payload from the specified IP address.

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://103.133.106.72/.-------------------.------------------------------/......................................-..........wbk) — 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://103.133.106.72/.-------------------.------------------------------/......................................-.......
  • 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://103.133.106.72/.-------------------.------------------------------/......................................-..........wbk Remote template reference
    • http://103.133.106.72/.-------------------.------------------------------/......................................-Remote template reference
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)

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