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

Static analysis result for SHA-256 0f53abadce48014e…

MALICIOUS

Office (OLE) / .DOC

101.0 KB Created: 2024-12-16 06:28:00 Authoring application: Microsoft Office Word
MD5: f8de9b2f8b9088be3dda1985fe7b20c3 SHA-1: edba0fb7fdd51294bf183a8d7ab8992bb1762ff5 SHA-256: 0f53abadce48014ec8ea5458af9b732ed1ea6d612b54b261a0e60928e36e86f1
472 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 triggered automatically when the document is opened. This macro uses WScript.Shell to download and execute a payload from a remote URL. The script also appears to use AES encryption for obfuscation, further indicating malicious intent. The presence of ShellExecute and WScript.Shell calls, along with an obfuscated auto-exec loader, strongly suggests a downloader or dropper.

Heuristics 13

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Obfuscated VBA Shell command with URL critical OLE_VBA_OBFUSCATED_SHELL_URL
    VBA macro invokes Shell with command text assembled through decoder or string-manipulation functions and includes a URL. This is a high-confidence downloader/dropper pattern, stronger than Shell or URL evidence on their own.
  • 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 ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • 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
    • https://gitlab.com/app8490744/updatesa/-/raw/main/up$
    • https://gitlab.com/app8490744/updatesa/-/raw/main/up

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
24412ce32329b8e468ca99851fed11fe6f656f476bfe92e7d296a27a3ecf4e3e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 94852 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 46 long base64-like blob(s).

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