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

Static analysis result for SHA-256 cdcd56e20b07e13b…

MALICIOUS

Office (OLE) / .DOC

170.0 KB Created: 2022-10-23 23:55:00 Authoring application: Microsoft Office Word First seen: 2022-10-25
MD5: 55afaae0ab2a0700827ba95154ca3d60 SHA-1: 756feff315f88fc172764c7ac996a169a3536a3a SHA-256: cdcd56e20b07e13b585db2c0fd7cd8eaac5eaa2df3fe1f2288e54c364e74d6f7
462 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer T1204.002 Malicious File

The sample contains VBA macros that leverage WScript.Shell to download and execute a file from the URL https://xuhuanstudio.cn/wp-content/plugins/apikey/Zeee.exe. The AutoOpen and Workbook_Open macros are present, indicating an attempt to automatically execute the malicious payload upon opening the document. This behavior is consistent with a dropper malware.

Heuristics 11

  • 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.
  • ClamAV: Doc.Dropper.Agent-6412232-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6412232-1
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_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 https://xuhuanstudio.cn/wp-content/plugins/apikey/Zeee.exe
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ae4f61dbe5fbeb2fa0d86d4a9f1e280d729a23e4d93bdbdb0775b53056b43652		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 66352 bytes

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