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

Static analysis result for SHA-256 1a674b45e6381c2e…

MALICIOUS

Office (OLE) / .DOC

87.0 KB Created: 2016-01-15 07:58:00 Authoring application: Microsoft Office Word First seen: 2022-11-25
MD5: 196e0beb485f0cc457218c963a708206 SHA-1: 01155f6c9c64661a4a715a517019551eeae0d037 SHA-256: 1a674b45e6381c2ece7963f509d80342133d099ff8425a2b9d2e432e5edeaa82
322 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The sample contains a critical heuristic for an obfuscated auto-exec VBA loader, which uses CreateObject and cmd.exe. The AutoOpen macro initiates this process, indicating a likely attempt to download and execute a secondary payload. The presence of cmd.exe and the obfuscated nature of the VBA code suggest a downloader or droppper functionality.

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.
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • CallByName call high OLE_VBA_CALLBYNAME
    CallByName call
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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
39c37c880f7e5cc65225e71c2a5355e0e6cdcce7ae8f4fec90beda5531d9cfdb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 105933 bytes

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