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

Static analysis result for SHA-256 4a2ef1275bc990de…

MALICIOUS

Office (OLE) / .DOC

179.5 KB Created: 2022-03-22 11:41:00 Authoring application: Microsoft Office Word First seen: 2022-03-22
MD5: 1c3e72af7df13ac844fb88b7ec12a594 SHA-1: 0ee218b82bced448ebdb0b0f44a17b85bad0dc04 SHA-256: 4a2ef1275bc990de685f884d4f707a2d6ce6a759aee9939dc0ec89faa95f1dff
342 Risk Score

Malware Insights

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

The sample contains a Document_Open VBA macro that utilizes WScript.Shell to access the user's 'Templates' special folder. This macro is designed to download and execute a second-stage payload, indicated by the critical OLE_VBA_SHELL and OLE_VBA_WSCRIPT heuristic firings. The presence of a long encoded blob and script execution terms further supports this malicious intent.

Heuristics 9

  • 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
  • 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.
  • 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
08c69457e9883384124a9ff3887719c301f78c2346f87446304785e66d6558ab		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 36861 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s). Carved artifact contains 124 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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