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

Static analysis result for SHA-256 0100e30dc13a7abe…

MALICIOUS

Office (OLE) / .DOC

95.0 KB Created: 2022-05-08 13:15:00 Authoring application: Microsoft Office Word First seen: 2022-05-08
MD5: 1c423e1f8ffed614e164dd8c69aed49b SHA-1: 346d7479dfedb8b6f0620f2f5ee0f36058aac57f SHA-256: 0100e30dc13a7abe79d5a400a20d0276869dffa620f635e7964eb479caaabd86
362 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The sample contains a VBA macro that leverages WScript.Shell and CreateObject to download a file from an embedded URL and execute it. The Document_Open macro is automatically triggered upon opening the document, indicating a downloader or initial access stage.

Heuristics 9

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC
    VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
  • 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
  • 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
b611cce3283b72f8440de3ee6fcb650139f85dbb48ac5f347ab07ab2e30f2e70		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 23009 bytes

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