Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 0ce047bb77073990…

MALICIOUS

Office (OOXML)

7.8 KB Created: 2019-07-17 10:07:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2020-09-07
MD5: 5bb459a84c488bcb9ee633332b5482d9 SHA-1: ff6a0d066371f796a0792db19ceeaebd35ed0bb9 SHA-256: 0ce047bb77073990a8810f8d6f178dc0d4fc5257603790f80d3d84b0b2405a6c
62 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 pointing to http://oppak.com/one/opa. This indicates the document is designed to fetch and likely execute content from this external URL, a common technique for delivering secondary payloads. The document body itself does not contain exploitable content, but the heuristics strongly suggest a malicious intent to download further stages.

Heuristics 3

  • Remote template injection high OOXML_REMOTE_TEMPLATE
    Document references a remote template URL (http://oppak.com/one/opa) — 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/settings.xml.rels: http://oppak.com/one/opa
  • 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://oppak.com/one/opa 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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