Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 b481b38dcf9d25dc…

MALICIOUS

Office (OOXML)

10.1 KB Created: 2018-03-07 09:39:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2021-11-23
MD5: 39ec26266c98e40654f88f1e60922b47 SHA-1: e350e7d497331c04b62af934cff267d1befa4395 SHA-256: b481b38dcf9d25dc23717c6a6556236de2b054d42010d9e0bb6c22ed1fc34141
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains heuristics indicating remote template injection and external relationships, pointing to a malicious document. ClamAV identifies it as Doc.Downloader.Redline-9972754-0, a downloader. The embedded URLs are highly suspicious and likely serve as the source for a second-stage payload. The document body is minimal and does not provide further context.

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://198.12.127.139/.....-....................--...............------------------................-/....-.......................-..........) — 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://198.12.127.139/.....-....................--...............------------------................-/....-..............
  • 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://198.12.127.139/.....-....................--...............------------------................-/....-.......................- Remote template reference
    • http://198.12.127.139/.....-....................--...............------------------................-/....-.......................-.....................................-................wRemote template reference
    • http://198.12.127.139/.....-....................--...............------------------................-/....-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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