Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 dde4ec99eb5d20fd…

MALICIOUS

Office (OOXML)

72.5 KB Created: 2018-09-17 19:34:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2019-11-20
MD5: 6ce0022945ec3446405a9cbd2ff9cd1c SHA-1: 738e1b6110ff32ad5415bd42886ddba5bd92258c SHA-256: dde4ec99eb5d20fd4d461321739c939b7ea4ade16a765ec531f47d50d3b151dc
202 Risk Score

Malware Insights

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

The sample contains a malicious DDE command that leverages cmd.exe and mshta to execute a PowerShell command. This PowerShell command downloads a second-stage executable from 'https://192.99.62.233/enjoy/Deffult/safe.exe' and executes it. The presence of the DDEAUTO command and the PowerShell execution strongly indicates a malicious intent to download and run a payload.

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: \\system32\\cmd.exe
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 https://192.99.62.233/enjoy/Deffult/safe.exe 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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