Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 2b67ee06e23b0c89…

MALICIOUS

Office (OOXML)

13.2 KB Created: 2018-11-23 07:11:00 UTC Authoring application: Microsoft Office Word 15.0000 First seen: 2019-04-18
MD5: 6dcd0c722fb1f59be9e9dcfcd248ba40 SHA-1: 3364126f8fb13a55efa6b0f72b5fe65c682ff71b SHA-256: 2b67ee06e23b0c892b52bbd8fc00d1d2afc34b80a6d085d709fea6d2dc003fba
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The sample contains a critical heuristic firing for a malicious DDE command, which is designed to execute a PowerShell script. This script, in turn, downloads and executes a second-stage payload from the embedded URL 'http://192.168.101.119/a.ps1'. The use of DDE to launch PowerShell indicates a clear intent to download and execute arbitrary code.

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: \\Microsoft\\Office\\MSword.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://192.168.101.119/a.ps1 In macro / runtime command snippet
    • 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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