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

Static analysis result for SHA-256 96de9b01e7e40338…

MALICIOUS

Office (OLE) / .DOC

65.5 KB Created: 2015-06-29 05:58:00 Authoring application: Microsoft Office Word First seen: 2022-11-25
MD5: 1396d0cb86bd400f7e364d583958ac33 SHA-1: 89280db8e88b69632dc9832b3ebf0f9dc13e5f32 SHA-256: 96de9b01e7e403388f92696c1f7f14b85e373962824aa248ca144f9314f5ffb3
342 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is a macro-enabled Word document containing an obfuscated auto-exec loader. The VBA macros utilize CreateObject and CallByName functions, indicative of attempts to execute arbitrary code. The presence of an AutoOpen macro and the critical heuristic 'OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER' strongly suggest the document is designed to download and execute a secondary payload, likely from one of the embedded URLs.

Heuristics 9

  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • ClamAV: Doc.Macro.ObfuscatedHeuristic-5931994-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.ObfuscatedHeuristic-5931994-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • CallByName call high OLE_VBA_CALLBYNAME
    CallByName 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://www.mcp.com/sams/�
    • http://www.mcp.com/sams/
    • http://search.yahoo.com/bin/search�
    • http://search.yahoo.com/bin/search
    • http://www.microsoft.com/ie/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
eacf7e4753ae3d0d911372354353523151886f54f69612052a978217a4114b85		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18918 bytes

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