Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 98840968fc82be71…

MALICIOUS

Office (OOXML)

12.6 KB Created: 2017-12-10 11:47:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2017-12-24
MD5: 650667c0bbfb592d52748854ca65133d SHA-1: d2b95e63d121c4b61fbb24b0957ab144b09534f4 SHA-256: 98840968fc82be715bf6e8af9a27cf5a4e4031ee9c49f0dfb89a7adabb7d9c2d
162 Risk Score

Malware Insights

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

The sample contains a critical DDE AUTO command that executes cmd.exe, which in turn runs a PowerShell script. This script downloads a file from 'http://myip.dnsomatic.com/' to 'C:\Users\Тест\1.txt' and then attempts to execute 'C:\Users\Тест\putty.exe'. This indicates a downloader or dropper functionality.

Heuristics 4

  • ClamAV: Doc.Exploit.DDEautoexec-6361400-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.DDEautoexec-6361400-2
  • Malicious DDE command critical OOXML_DDE_MALICIOUS
    DDE field in word/document.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://schemas.microsoft.com/office/word/2010/wordprocessingCanvas In 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)
    • http://myip.dnsomatic.com/In document text (OOXML body / shared strings)

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