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

Static analysis result for SHA-256 b12d335508fcabe0…

MALICIOUS

Office (OLE) / .DOCX

128.5 KB Created: 2022-02-10 21:39:00 Authoring application: Microsoft Office Word
MD5: 492a50ac0263c45bfc8be5d7726c4d55 SHA-1: 21e2c8619390c5c0159bc27cda5979f7ffaa8f15 SHA-256: b12d335508fcabe00259e6d55b658cf805dee29350b49cc0734aee6f73cc24a5
242 Risk Score

Malware Insights

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

The sample contains VBA macros that utilize WScript.Shell and CreateObject to download a file from the hardcoded URL 'https://example.com'. The script then saves the downloaded content as a DLL to the temporary directory and executes it using 'rundll32.exe'. This indicates a downloader or droppper functionality, aiming to fetch and run a second-stage payload.

Heuristics 7

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Suspicious extracted artifact medium 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://example.com

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
d575f7f4f0961da4a05926eeba53abb4987cc0d3f5f5541408e05067a550e74f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2877 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s).

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