Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 f9e9d078a2e1299b…

MALICIOUS

Office (OOXML)

11.5 KB Created: 2018-07-13 08:22:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2019-05-16
MD5: d7c8da3f6bc00a349bbc014255325082 SHA-1: 98e16a6d311d6d896eeb6bcaa92d8ec67ece30ab SHA-256: f9e9d078a2e1299b849f296da2af3ee7dc23dd49346c08b4f683396a3fb023fe
162 Risk Score

Malware Insights

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

The sample contains a critical heuristic firing for a malicious DDE command embedded within the document body. This command executes cmd.exe, which in turn runs a PowerShell script. The script is designed to download a file from http://www.testdomain.com/test.exe into the %temp% directory and then execute it. This indicates a downloader or dropper functionality.

Heuristics 4

  • 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: \\\\system32\\\\cmd.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://www.testdomain.com/test.exe In macro / runtime command snippet
    • 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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