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

Static analysis result for SHA-256 a589a26ec4807af3…

MALICIOUS

Office (OLE) / .DOC

82.0 KB Created: 2021-04-06 02:05:00 Authoring application: Microsoft Office Word
MD5: 49d9e75dd3c755c35021c29a88b6c83f SHA-1: ad3fc98f9f66afce7175bf50bc4b1139b726883a SHA-256: a589a26ec4807af3e41d0ced47ed1a86ba7498a26e76773fe5a4b6853d703e38
248 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell

The sample is a malicious DOC file containing VBA macros. The 'Document_Open' macro is configured to execute automatically upon opening the document, utilizing the 'Shell()' function. This indicates the macro's intent is to download and execute a second-stage payload. The presence of Windows Script Host references further supports this execution vector.

Heuristics 8

  • 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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