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

Static analysis result for SHA-256 54bbde3c4ab96dfa…

MALICIOUS

Office (OLE) / .DOCX

968.5 KB Created: 2020-09-21 17:10:00 Authoring application: Microsoft Office Word
MD5: b438c4cb55b41712e38324c2bc8d4b15 SHA-1: 8d29cb5f99422dada065025d8ab90fa670a2a20b SHA-256: 54bbde3c4ab96dfa02a81c9029d68dd0202c3002b4b542451d86d66b3c9ab52a
400 Risk Score

Malware Insights

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

The sample is a Microsoft Office document containing VBA macros. Critical heuristics indicate the use of `Shell()` and `WScript.Shell`, suggesting the macros are intended to execute commands or download additional content. The presence of an `Auto_Close` macro further supports an automated execution flow upon document closure. The ClamAV signature 'Doc.Dropper.Sdrop-9769002-0' also points to a dropper functionality.

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.Dropper.Sdrop-9769002-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Sdrop-9769002-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close 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.
  • 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
4c9238efcbd310b4639ed140e6ecc8e3a2cfd64a7d56323e021e6c1a7fd6b0a7		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 34613 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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