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

Static analysis result for SHA-256 7beef77604001a9a…

MALICIOUS

Office (OLE) / .DOC

82.0 KB Created: 2021-04-06 02:06:00 Authoring application: Microsoft Office Word
MD5: 7f989b54b5eccb99da386e4f6f6efd2f SHA-1: 0dee54eba5e7eb803a97ad7e0ad0232dad07e5ca SHA-256: 7beef77604001a9a03fc7a267eef0de3b8c89975ddfd3675a8e6cf6e510b036c
210 Risk Score

Malware Insights

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

The document contains a VBA macro that executes upon opening, as indicated by the 'Document_Open' subroutine and the 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic. This macro writes obfuscated content to a file named 'ChromePro.vbe' in the user's AppData directory and then likely executes it. The 'OLE_VBA_SHELL' heuristic firing further supports the execution of external code. The presence of 'WScript' references suggests the potential use of Windows Script Host for execution.

Heuristics 7

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • 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
    • http://schemas.openxmlformats.org/officeDocument/2006/bibliography
    • http://schemas.openxmlformats.org/officeDocument/2006/customXml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
97fdf7202dbe710f644fdb9c04afc6d965d67264f936524414717c9e1bf0b021		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2867 bytes

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