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

Static analysis result for SHA-256 be8e3a4d3c081e05…

MALICIOUS

Office (OLE) / .DOC

77.0 KB Created: 2021-12-22 09:40:00 Authoring application: Microsoft Office Word
MD5: 6c877ccd6366293e8899c17dee0fd743 SHA-1: 0dd91a8200800b129503762539a1791950f21167 SHA-256: be8e3a4d3c081e05222a72cad891c8d8fb587f5cc1df7fd29e4522a1d0979739
402 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample contains VBA macros, including a Document_Open macro, which is designed to execute automatically. The script utilizes WScript.Shell to execute a command that saves a file named 'mouseCardTable.h' and then executes it. This indicates a downloader functionality, aiming to retrieve and run a secondary payload. The obfuscated document body content does not provide further context on the lure.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • ClamAV: Doc.Downloader.WordBlueFont12213-9918948-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.WordBlueFont12213-9918948-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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.
  • 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.
  • 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
d672bf879bdc2efdfb2e46d82093ff49e29d9778187f330f8d688ddb012e87be		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 998 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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