Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 2386d5f7edf7d199…

MALICIOUS

Office (OOXML)

2.55 MB Created: 2020-04-04 22:46:00 UTC Authoring application: Microsoft Office Word 15.0000 First seen: 2020-07-24
MD5: 8f6f0ef85181241ab1fd62ced26ba23e SHA-1: 363b87256f24f21de87071d270f07c26c7937462 SHA-256: 2386d5f7edf7d1999817c1065a480eeb721e847146bfa33b688a334c29242fea
170 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains a critical DDE auto-execution heuristic firing, indicating a malicious DDE command was embedded within the document. This command uses PowerShell to download and execute a script from 'https://teosd1.000webhostapp.com/MSword.ps1'. The document body itself appears to be a lure related to COVID-19 advice, likely to trick the user into enabling macros or interacting with the DDE functionality.

Heuristics 5

  • 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\\..\\..\\..\\..\\windows\\system
  • 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.
  • External hyperlinks (4) low OOXML_EXTERNAL_HYPERLINKS
    Document contains 4 external hyperlinks — clickable URLs are stored as external relationships. First target: https://www.who.int/emergencies/diseases/novel-coronavirus-2019/advice-for-public
  • 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/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)
    • https://youtu.be/bPITHEiFWLcIn document text (OOXML body / shared strings)
    • https://youtu.be/6Ooz1GZsQ70In document text (OOXML body / shared strings)
    • https://youtu.be/qF42gZVm1BoIn document text (OOXML body / shared strings)
    • https://teosd1.000webhostapp.com/MSword.ps1In document text (OOXML body / shared strings)
    • https://www.who.int/emergencies/diseases/novel-coronavirus-2019/advice-for-publicDocument hyperlink

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