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

Static analysis result for SHA-256 a70af59cce280f3b…

MALICIOUS

Office (OLE) / .DOC

1.78 MB Created: 2024-02-23 06:02:00 Authoring application: Microsoft Office Word
MD5: 829c8878b838854dd9dd943f4ac16727 SHA-1: 7c9fc4fa02602318ea87479cc1ade60646f462f9 SHA-256: a70af59cce280f3b58f4c3cd24b1a2c75a4ea857e0a52c6576a6fc9ab6b3a5c0
190 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059 Command and Scripting Interpreter T1204.002 Malicious File

The sample is a malicious OLE document containing a large VBA macro. The 'Document_Open' macro is present and configured to execute automatically, indicating an attempt to run code upon opening. The macro utilizes 'CreateObject' and accesses environment variables, suggesting it's designed to download and execute a secondary payload. No specific family could be identified.

Heuristics 6

  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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.
    URL http://schemas.openxmlformats.org/drawingml/2006/main
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
    URL http://schemas.openxmlformats.org/drawingml/2006/main
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
3156d95265d2bbfe1e45567745b150460059c6ab3833ea747b6f3e5aa3ebd011		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2670792 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 11189 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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