Malicious Office (OLE) / .DOCX — malware analysis report

Static analysis result for SHA-256 c769352bc206024b…

MALICIOUS

Office (OLE) / .DOCX

172.0 KB Created: 2021-01-25 09:42:00 Authoring application: Microsoft Office Word
MD5: 30e0ed6edf9874c15a0e38f53fac2921 SHA-1: f44044e601a6f3842b0156f330127883e0653e5c SHA-256: c769352bc206024ba5ad8d61738498f292708619344d692ff85de43cb326cb52
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment

The file contains VBA macros, specifically a Document_Open macro that is automatically executed when the document is opened. This macro uses a GetObject call, indicating an attempt to execute code. The ClamAV detection 'Doc.Malware.Valyria-10034158-0' strongly suggests malicious intent, likely involving the download and execution of a secondary payload. The document body content is heavily obfuscated and does not provide clear user-facing text, but the heuristic firings are sufficient to infer the attack pattern.

Heuristics 6

  • ClamAV: Doc.Malware.Valyria-10034158-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-10034158-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
1604f6e2e05bd78747d6f8ed2ec7d90b3ad25242821a34c9eac132c9f36477a5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 8432 bytes

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