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

Static analysis result for SHA-256 1a713e4ddd8b1a61…

MALICIOUS

Office (OLE) / .DOC

111.0 KB Created: 2017-06-12 10:53:00 Authoring application: Microsoft Office Word First seen: 2021-09-23
MD5: 697cbcf62d93e93acafcbf8cc8b26c08 SHA-1: 5c484cba74b0333ec5073e51978d4019ea2eee2c SHA-256: 1a713e4ddd8b1a6117c10afe0c45496dfb61154bff79a6dee0a9ffb0518f33d3
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The critical ClamAV detection and high-severity heuristics for VBA macros, specifically the Document_Open auto-execution and CreateObject calls, indicate malicious intent. The VBA script, although truncated, contains obfuscated strings that are likely used to construct a URL for downloading a second-stage payload. The script's primary function appears to be the execution of this downloaded payload, aligning with a dropper's behavior.

Heuristics 7

  • ClamAV: Doc.Dropper.Agent-6538578-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6538578-0
  • 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://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/photoshop/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
016235e08e6f4dba41b0a900639901115dbc07f4afccee29febaab08a58f826b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 7926 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 5 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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