Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 62e069332425decf…

MALICIOUS

Office (OOXML)

11.2 KB Created: 2019-01-16 10:41:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2020-05-25
MD5: a441723514f79d83a88e50196121710d SHA-1: 1a67b0b6194de593b35cf0e7f85933e3cb151f15 SHA-256: 62e069332425decf71b36c7a93b7451725f7ba126e3bf0cc8a226f54cf16e4f1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample contains a malicious DDE command that executes cmd.exe, which in turn runs a PowerShell command. This PowerShell command is designed to download a file from 'http://oasishotels.com/robots.txt' and execute it. This indicates the document is a lure to download and run a second-stage payload, likely for further malicious activity.

Heuristics 3

  • Malicious DDE command critical OOXML_DDE_MALICIOUS
    DDE field in word/document.xml launches a dangerous executable: cmd
  • 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://oasishotels.com/robots.txt 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.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/2006/wordmlIn document text (OOXML body / shared strings)

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