Win.Downloader.DDEObfuscatedCmdExec-6715128-0 — Office (OOXML) malware analysis

Static analysis result for SHA-256 0e4dd0d85a3449d0…

MALICIOUS

Office (OOXML)

14.5 KB Created: 2017-11-16 22:39:00 UTC Authoring application: Microsoft Office Word 15.0000 First seen: 2019-03-18
MD5: 7385336c62cab493a0db7a3115979170 SHA-1: 189d00a2ae16931f561554969afc02d4467df505 SHA-256: 0e4dd0d85a3449d04d93424ba7102fa8dd7c5de162bc3a4ded7a15f7b7e99636
162 Risk Score

Malware Insights

Win.Downloader.DDEObfuscatedCmdExec-6715128-0 · confidence 95%

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

The sample contains a malicious DDE AUTO command that leverages PowerShell to download and execute a second-stage payload. The command explicitly uses PowerShell to download content from http://[evil_ip]/shell.txt and another URL pointing to Invoke-Mimikatz.ps1, indicating a downloader or infostealer functionality. This behavior is consistent with a spearphishing attachment designed to deliver malware.

Heuristics 4

  • ClamAV: Win.Downloader.DDEObfuscatedCmdExec-6715128-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Downloader.DDEObfuscatedCmdExec-6715128-0
  • Malicious DDE command critical OOXML_DDE_MALICIOUS
    DDE field in word/document.xml launches a dangerous executable: \\Microsoft\\Office\\MSWord.exe\\..\\..\\..\\..\\windows\\sy
  • 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://[evil_ip]/shell.txt In document text (OOXML body / shared strings)
    • https://github.com/PowerShellMafia/PowerSploit/raw/master/Exfiltration/Invoke-Mimikatz.ps1In 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/2012/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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