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

Static analysis result for SHA-256 d451e3e7766abda3…

MALICIOUS

Office (OLE) / .DOC

60.0 KB Created: 2020-04-19 02:19:00 Authoring application: Microsoft Office Word
MD5: 777ae25f201130e51ff9d3cb2dfd9e91 SHA-1: 49445290bc57b4f8b10ea3de4b91cbbd852d390e SHA-256: d451e3e7766abda3a6406d3e52ed8d123daa52409bb7905a44694855fa923888
400 Risk Score

Malware Insights

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

The sample is a malicious OLE document containing VBA macros. Critical heuristics indicate the use of WScript.Shell and a Shell() call within a Document_Open auto-exec macro. This strongly suggests the macro's intent is to execute arbitrary commands, likely to download and run a second-stage payload. The ClamAV detection further confirms its malicious nature.

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
f28c90918599b9e0f0db05a89fe7fb83180fb53ecce753c84227885070c3982f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 14485 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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