Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 ef66b7c54e8a5876…

MALICIOUS

Office (OOXML)

83.7 KB Created: 2017-10-31 18:59:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2017-11-13
MD5: b25c10cfde962868a4df638eec10411e SHA-1: b29e92500c05d99e197b7f64c9e89257455f3422 SHA-256: ef66b7c54e8a5876182b12b7b93536b7d76819548d182f8b53d8e969f395dd67
162 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The sample contains a critical heuristic firing for a malicious DDE command, which leverages cmd.exe to execute a PowerShell command. This PowerShell command attempts to download content from the URL 'http://totallyevilfakedomain142.com'. The DDE execution is a common technique for initial execution of malicious payloads.

Heuristics 4

  • ClamAV: Doc.Exploit.DDEautoexec-6346603-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.DDEautoexec-6346603-1
  • Malicious DDE command critical OOXML_DDE_MALICIOUS
    DDE field in word/footer1.xml launches a dangerous executable: \\System32\\cmd.exe
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://totallyevilfakedomain142.com In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvasIn document text (OOXML body / shared strings)
    • 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.microsoft.com/office/word/2010/wordprocessingDrawingIn 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/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

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