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

Static analysis result for SHA-256 b29ce946f9ac19e1…

MALICIOUS

Office (OLE) / .DOCX

69.5 KB Created: 2022-04-19 16:14:00 Authoring application: Microsoft Office Word First seen: 2022-04-19
MD5: a68d6a202652dfbb58cb08e626acd6e4 SHA-1: 55e1d73e334ac2777bb60fd430ab4ca6cbce772e SHA-256: b29ce946f9ac19e1ddd49669af689fdebd7d1d4405f9ea7a034b31f2085e0c5b
270 Risk Score

Malware Insights

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

The sample contains VBA macros that utilize WScript.Shell and CreateObject to create a VBScript file named 'HelpCenterUpdater.vbs' within a newly created directory 'AdobeHelpCenter' in the user's Documents folder. This script is likely designed to download and execute a second-stage payload. The presence of WScript.Shell and Shell() calls strongly indicates malicious intent for execution and potential further compromise.

Heuristics 8

  • 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
  • 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
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • 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
8b68b2a4fdc1cc463cb64ba30a7f74aa295967c929496b459722af343ce86be9		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 32605 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved artifact contains 62 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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