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

Static analysis result for SHA-256 5740597cab760481…

MALICIOUS

Office (OLE) / .DOC

509.0 KB Created: 2020-06-16 08:32:00 Authoring application: Microsoft Office Word
MD5: 1cc3e165448a1507ce5e59b18a7de037 SHA-1: 1f88a72ea7e6819edbe8af361e2258d661fc9ea5 SHA-256: 5740597cab760481789304022438aac74fc44994073c340b08577ee582dba776
348 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 VBA macros that utilize WScript.Shell to execute commands. Specifically, the script attempts to download a payload from 'https://batriaruum.com/dasruol.dll' or 'https://penotorc.com/topwin.dll'. The AutoOpen macro and Shell() call heuristics indicate immediate execution upon opening the document, suggesting a downloader or droppper functionality.

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
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen 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
  • 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 https://batriaruum.com/dasruol.dll
    • https://penotorc.com/topwin.dll
    • http://www.w3.org/1999/XSL/Transform
    • 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
067098ea1787e892b1b9e663d6e3be6340c95bc7e0e30626a25b9665c91cde9d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 9012 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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