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

Static analysis result for SHA-256 b3819457cfe2833d…

MALICIOUS

Office (OLE) / .DOC

78.0 KB Created: 2016-12-21 04:35:00 Authoring application: Microsoft Office Word
MD5: 549f3ac6b2954f713737bdf054f18d47 SHA-1: afa56271b73e6aca8b694adf433bea7233d1c5b7 SHA-256: b3819457cfe2833de70d1ee91bce45b37984e86b085ef813e3feceb2b35352c3
280 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The file is a malicious OLE document containing VBA macros. The 'AutoOpen' macro is present and configured to execute a shell command, indicating it's designed to download and execute a second-stage payload. The document body contains a lure to enable macros, common for dropper malware. The ClamAV signature 'Doc.Dropper.Downloader-6398287-0' further confirms its nature as a downloader.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Dropper.Downloader-6398287-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Downloader-6398287-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • 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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
95a9b7fbc6b69e46fc0c10fd80896a4d395f75e17b61e9c7ac148bd3e71a4c29		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 8175 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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