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

Static analysis result for SHA-256 c4902a7a5058fe9b…

MALICIOUS

Office (OLE) / .DOC

210.0 KB Created: 2019-04-11 12:28:00 Authoring application: Microsoft Office Word
MD5: 2176e4f4af4abb52c7ae77cc4a30bb2d SHA-1: 9dcaeb06fc0d3fd31b48875b271f48fd5450fb9e SHA-256: c4902a7a5058fe9b65d47d59dc62e36f5049146e5f551c1d5622226649da9888
260 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1218 Signed Binary Proxy Execution T1059.005 Visual Basic

The file contains VBA macros, including an AutoOpen macro, which is a common delivery mechanism for malicious documents. The critical heuristic OLE_VBA_WMI_PROCESS_CREATE indicates that the macros attempt to launch processes using WMI. This suggests the macro's intent is to download and execute a second-stage payload. The presence of a ClamAV detection further supports its malicious nature. No specific family could be identified.

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-6937309-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.00536d-6937309-0
  • 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
02e2a18d61a87dc9e1aef168bb21dea131334e3ad128d660ce0c0b3a71312354		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 41825 bytes

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