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

Static analysis result for SHA-256 e5e0471361d78032…

MALICIOUS

Office (OLE) / .DOCX

98.5 KB Created: 2020-10-27 15:23:00 Authoring application: Microsoft Office Word
MD5: e80fbff9e287d2fa4a8b9e3b8abd4bd1 SHA-1: 34b1b7852f742096f59b8a6f157606dffb12269b SHA-256: e5e0471361d780326fdfe8a9a20226178afb3623737bd3019c3befba45ffc619
440 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1218.011 Signed Binary Proxy Execution: Rundll32 T1059.005 Visual Basic

The sample contains a Document_Open VBA macro that utilizes WScript.Shell and CreateObject to execute commands. This is a common technique for downloading and executing further malicious payloads. The presence of the 'SC_STR_WSCRIPT' and 'OLE_VBA_SHELL' heuristics strongly indicates malicious script execution. The embedded URL is likely used for command and control or payload delivery.

Heuristics 11

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • ClamAV: Doc.Malware.Valyria-10034015-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Valyria-10034015-0
  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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 https://reporting.attachment-asbas.ch/log/?type=attachmentinfection&uuid=
    • 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
    • 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
142b00d59bc6f39b0230c7ee8726ea55293dc353e785efe5deb164cbec804701		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1296 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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