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

Static analysis result for SHA-256 76c840d0f68f0df5…

MALICIOUS

Office (OLE) / .DOCX

164.3 KB Created: 2021-01-05 07:28:00 Authoring application: Microsoft Office Word
MD5: 2325ebf241ab3582ac69f23e7c68640d SHA-1: a06c2cb79df575eb3dc4a70d2d77b6e32b05d9b2 SHA-256: 76c840d0f68f0df5c597b7034cf2461c184b1b425a79a88f9b25316030673e77
262 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer

The sample contains a heavily obfuscated VBA macro that executes upon opening the document. The macro utilizes CreateObject to interact with the file system, attempting to write files to specific paths. The ClamAV detection and the nature of the obfuscated auto-exec loader strongly suggest a downloader or droppper functionality, likely for a second-stage payload.

Heuristics 7

  • 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.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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
a19bea0b68e66c642d89ca357193de473f2db600ca0ce526dc79ce8aaabe41a9		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10612 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.