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

Static analysis result for SHA-256 36239d0201d63bdb…

MALICIOUS

Office (OLE) / .DOCX

310.0 KB Created: 2015-10-09 20:25:00 Authoring application: Microsoft Office Word
MD5: c82f3f454f961ac8b42a6b172d8a58e4 SHA-1: 8b9dfa5d9aa1c57cc6750531f81ea66611cb5ab6 SHA-256: 36239d0201d63bdbeabb8704f79e4417d431ecc903b335ec4d17073f0e4ba48e
360 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample contains a malicious VBA macro, specifically a Document_Open macro, which is designed to execute a shell command. This command likely downloads and executes a second-stage payload from the embedded URL http://cpap.com.br/orlando/. The presence of ShellExecute, LoadLibrary, and GetProcAddress API calls further supports the payload execution and potential dynamic loading of malicious code.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • Reference to LoadLibrary API high SC_STR_LOADLIBRARY
    Reference to LoadLibrary API
  • Reference to GetProcAddress API high SC_STR_GETPROCADDRESS
    Reference to GetProcAddress API
  • 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://cpap.com.br/orlando/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
f4b9fcf8b3035a81236a4a3f29666de3fe37146251274fc3cce154adf0434002		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 128869 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 11 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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