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

Static analysis result for SHA-256 e91b4984341cb944…

MALICIOUS

Office (OLE) / .DOC

223.4 KB Created: 2019-03-12 07:53:00 Authoring application: Microsoft Office Word
MD5: 001c3cdd02e72474698d8dbedd5faaf1 SHA-1: 183bb7c4c877fbf894050fae55ff2911cf7a41a1 SHA-256: e91b4984341cb9445bc3836cde8f7c6f60636d757e529e5f6204fff5f41027ae
260 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1218 Signed Binary Proxy Execution

The sample contains a high-confidence AutoOpen VBA macro that utilizes GetObject and CreateObject to launch the Win32_Process WMI class. This indicates the macro is designed to execute arbitrary commands or download and run a second-stage payload. The ClamAV detection name 'Doc.Downloader.00536d-6890740-0' further supports its role as a downloader. The document body content is heavily corrupted and unreadable, providing no additional context.

Heuristics 7

  • VBA WMI Win32_Process launcher critical OLE_VBA_WMI_PROCESS_CREATE
    VBA macro builds or references a WMI moniker for Win32_Process and invokes .Create to start a command. This is a high-confidence macro execution chain that often hides the WMI class name through string concatenation or helper functions.
  • ClamAV: Doc.Downloader.00536d-6890740-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.00536d-6890740-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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.
  • 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
344566484c4bb55e1fe894f785a55f41d5f0f4dd9962dc4ad313799767362789		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 49210 bytes

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