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

Static analysis result for SHA-256 963ef1f1d728673b…

MALICIOUS

Office (OLE) / .DOC

60.0 KB Created: 2020-04-19 02:19:00 Authoring application: Microsoft Office Word
MD5: 523873f689cda6ab97b53a3a3ec3d629 SHA-1: ca58ee639b3b76d8710b9380d31309fdf5ee9f0d SHA-256: 963ef1f1d728673b7769357ef250a53cf202abf7748fb780158e8b642aa63ba8
400 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1218 Signed Binary Proxy Execution

The sample contains a Document_Open VBA macro that is executed upon opening the document. This macro utilizes WScript.Shell and CreateObject, indicating it's designed to execute arbitrary commands or download further payloads. The ClamAV heuristic also flags it for obfuscation. While the exact payload is not clear from the static analysis, the presence of these critical indicators strongly suggests a malicious intent to compromise the system.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • ClamAV: Xls.Macro.Obfuscation-9804250-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Macro.Obfuscation-9804250-0
  • 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
  • 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
58f51d6b4893d790689a57f0413d709425b47fd384209c9f20350006dd1ca822		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 14615 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved artifact contains 69 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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