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

Static analysis result for SHA-256 e3dbf118d6c7df1e…

MALICIOUS

Office (OLE) / .DOC

62.0 KB Created: 2021-04-01 03:48:00 Authoring application: Microsoft Office Word
MD5: 05d1313dcb7be4a8c663a12abd2b48c2 SHA-1: d12e717ebdc9a65698ed67982c1eadb001ace23c SHA-256: e3dbf118d6c7df1ef21ad8935f4751dd7c64c40700f7d5e9db078f6c4bb28bdb
360 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample contains a VBA macro that automatically executes upon opening, as indicated by the 'Document_Open' macro and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic. The macro utilizes 'WScript.Shell' and 'CreateObject' to execute commands, likely to download and run a second-stage payload. The 'SE_ENABLE_LURE' heuristic and the 'Confidential Document' text in the DOC BODY strongly suggest a social engineering tactic to bypass macro security.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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.
  • 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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
603e866afbfa2a53291162e0c1ca39de3ec3e9d6f0455790180d9579fc3e2a2e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10161 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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