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

Static analysis result for SHA-256 0b59afb80d97e623…

MALICIOUS

Office (OLE) / .DOCX

96.5 KB Created: 2024-12-16 06:28:00 Authoring application: Microsoft Office Word
MD5: 9b6d32a2049de15b7054cbdf1e603dbb SHA-1: 1b46dce266ea31ba3365d9f6152d5fee68ae184f SHA-256: 0b59afb80d97e62328ab8719df49c0c2e45c1ce243bc0b3299f97e2c01cf33f5
372 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample contains a Document_Open VBA macro that is heavily obfuscated and uses CreateObject and Shell() calls, indicating it attempts to download and execute a second-stage payload. The script also references WScript.Shell, suggesting it may interact with the Windows scripting host. The reconstructed AES key and encrypted payload are indicative of a downloader or dropper.

Heuristics 11

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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.
  • 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)
  • Suspicious extracted artifact info 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.
  • 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
6c2826af6dbb323a6eb71862010b636304b5ee8d0faafde2e0ab003c939c2df2		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 87324 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 46 long base64-like blob(s).

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