Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 cf57526e6236150d…

MALICIOUS

Office (OOXML)

10.1 KB Created: 2019-08-20 14:05:00 UTC Authoring application: Microsoft Office Word 12.0000
MD5: dfe50e47bff0669ffd3f62b8823ebf89 SHA-1: cb4b16c02e3a04478a29c586f1e43a1ba29c1a6e SHA-256: cf57526e6236150d369606a4e48ade93c7b4d27180012af952cfd1d53de8d565
122 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample contains a critical heuristic firing for a malicious DDE command, specifically 'DDEAUTO c:\windows\system32\cmd.exe "/k mspaint.exe"'. This indicates an attempt to exploit the Dynamic Data Exchange feature to execute arbitrary commands upon opening the document. The command itself is designed to launch the `mspaint.exe` application, likely as a precursor to further malicious activity or to bypass initial detection.

Heuristics 3

  • Malicious DDE command critical OOXML_DDE_MALICIOUS
    DDE field in word/document.xml launches a dangerous executable: \\system32\\cmd.exe
  • ClamAV: Doc.Exploit.DDEautoexec-6346603-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.DDEautoexec-6346603-1
  • 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://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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