Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 0c432c11df9e8d3b…

MALICIOUS

Office (OOXML)

81.1 KB Created: 2021-06-18 06:12:57 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2021-07-02
MD5: 70ce936904b26d94a413a21e07b13892 SHA-1: ab6bdb072d2126d628dab88554474b73aa142cd0 SHA-256: 0c432c11df9e8d3b8ce279b7400301137f4f83e8ea6bc6b2d63b5c0e21d523fc
122 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample contains a critical heuristic indicating a DDE link that abuses cmd.exe to launch PowerShell. The PowerShell command is designed to download a JAR file from the provided URL and execute it. This indicates a downloader or dropper functionality, likely delivered via spearphishing.

Heuristics 3

  • ClamAV: Xml.Exploit.DDE_Abuse-9987933-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xml.Exploit.DDE_Abuse-9987933-1
  • Spreadsheet DDE link launches a dangerous command critical OOXML_SPREADSHEET_DDE_MALICIOUS
    Excel workbook contains an externalLinks/ddeLink entry whose ddeService/ddeTopic launches a dangerous executable. This is SpreadsheetML DDE command execution, distinct from WordprocessingML DDE field instructions.
  • 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://xxx.github.io In document text (OOXML body / shared strings)

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