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

Static analysis result for SHA-256 ee35dcce424eac80…

MALICIOUS

Office (OLE) / .DOC

182.1 KB Created: 2019-04-16 12:52:00 Authoring application: Microsoft Office Word
MD5: 5d6c2aaca70c1ab08636bd377c4c14c6 SHA-1: 91d405a08879a659e1c70123f08ec9a1e54bb780 SHA-256: ee35dcce424eac80d775ef58046ae6dc21fc97ce89dbdd22f0a1b28f6f3d54e7
260 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell

The sample is a malicious OLE document containing a high number of VBA macro firings, including critical detections for WMI process creation and auto-execution. The AutoOpen macro and GetObject calls indicate that the embedded VBA code is designed to run automatically upon opening the document. Specifically, the VBA WMI Win32_Process launcher suggests the script attempts to create a new process using WMI. This is a common technique for downloading and executing a second-stage payload.

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.Malware.00536d-6942037-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.00536d-6942037-0
  • 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
487f5a305c7f036f903c216ef81babd1946166a9ecdf97a6eac62ec0511f0d52		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 30084 bytes

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